Monday, July 15, 2019, 15:54 : TBHT high current cables moved to Coil feedthroughs.

Coil high current cables moved to TBHT feedthroughs.

Resistor across  Coil feedthroughs E and F are now moved between TBHT feedthroughs A and B.

Tuesday, July 16, 2019, 09:00

A braided cable between F and H was changed due to the burnt aspect it had. Most likely this cable was burnt along the previous ones (see entry 740) but since it was uniformed blacked and not broken I didn't noticed it.

Resistor/Varistor between TGHT and TBHT removed.

 Reminder. Mini pump still linked to SV1. DO NOT OPEN SV2!!!

1. Optimize (tune) the beam to FC0 and then to FC6.
2. Compensate beam energy by substracting the value of anode voltage to the high voltage. Thursday, June 25, 2020, 16:07: FEBIAD is on cathode bias
   
3. Perform an efficiency measurement to know the correct work of the mini pump and also the time needed for 1 measurement.
4. Perform at least 3 efficiency measurements of the same configuration as a sanity check on the reproducibility of the measurements.

The system is prone to trip if the build-up pressure for the gas lines is higher than 7e-6T.  I will try to wait as long as reasonably possible to make sure the gas lines are pumped to good vacuum levels.

COVID-19 protocol: buddy is Marla Cervantes

New idea: Screenshot e-log on the ISAC TS team notebook: 20-06-26 FEBIAD development day  (Web view)

Thursday, June 25, 2020, 08:38:  TGHT / TBHT @ 580 / 280. Coil @ 0A. Vacuum @ 3.71e-06T. BIAS / EE / EZL @ 30 / -1.5 / 13 kV. Anode @ 100 V.

Thursday, June 25, 2020, 10:34: TP6 tripped. Closed IV4 closed and reset it. TP6 on

Thursday, June 25, 2020, 10:41:IV4 open

Thursday, June 25, 2020, 10:54: Optimizing beam to FC0 with current tune.

Thursday, June 25, 2020, 12:19: New values for TPS:Q1,Q2,Q3,Q4. Better beam shape on RMP0A and 0B

Thursday, June 25, 2020, 12:33: I think there is something wrong with this  FEBIAD as the mass scan does not show any peaks.

I've noticed the word document from Aaron, and he observed peaks likely from surface ionized species. Furthermore there is no anode current readback on epics nor on the power supply.

Possbile culprits. The anode is not well attached to the 9-pin. The cathode temperature is extremely low and there are no electron-impact ionized species.

 Thursday, June 25, 2020, 12:52: Power supply is on cathode bias mode as well as all the service cap wiring.

Thursday, June 25, 2020, 13:03:  Back to old tunes. Mass scan still showing only surfaced ionized species.

 Thursday, June 25, 2020, 14:30:  Mass scan for 0V finished. Peaks at 38 and 28 u. 38 is Potassium, but 28 is odd, closest surface ionized species might be Al27 with an ionization potential of about 5.8 eV.

Thursday, June 25, 2020, 15:20 : Mass scan for 100V finished. Peaks still at 38 and 28 but with different intensities. Now there are features  what seem to be 18 and 14. Water and N respectively.

Thursday, June 25, 2020, 15:03: Manually tap TBHT to 290 A.

Thursday, June 25, 2020, 15:31: FC6 signal increased. Anode leakage current still showing 0.0 mA.

Thursday, June 25, 2020, 15:35: Manually tap TBHT to 295 A

Thursday, June 25, 2020, 15:58: Mass scan completed. More peaks showed up.

Thursday, June 25, 2020, 15:35: Manually tap TBHT to 300A. Anode leakage current still showing 0.0 mA.

Thursday, June 25, 2020, 16:30: Manually tap TBHT to 305A. Anode leakage current still showing 0.0 mA.

Increasing Anode to 500 V, now there is a reading of 1.2mA. However, there were sparks on the high voltage so this current might be a leakage current from the high voltage.

Thursday, June 25, 2020, 16:34: Lowering to 300A to run a mass scan.

Thursday, June 25, 2020, 16:59: Similar mass spectrum, the anode current is meaningless.

Thursday, June 25, 2020, 17:00: Mass 28 will be used for efficiency measurements.

Thursday, June 25, 2020, 17:15: SV3 closed.

Thursday, June 25, 2020, 17:20: SV4 closed.

Thursday, June 25, 2020, 17:38: SV5 closed.

Thursday, June 25, 2020, 17:39: SV1 opened (mini pump)

Thursday, June 25, 2020, 17:41: Opening and closing SV3 and SV4.

Thursday, June 25, 2020, 17:45: Opening SV5. System tripped.

Thursday, June 25, 2020, 17:51: I will open the cage  to see if the mini pump is on.

Thursday, June 25, 2020, 17:58: The mini-pump was off and unplug. Now connected and running.

 Thursday, June 25, 2020, 18:00: SV1 open.

Thursday, June 25, 2020, 18:10: SV1 closed

Thursday, June 25, 2020, 18:10: SV5 open. Negligible response on IG1.

Thursday, June 25, 2020, 18:13: SV5 off. SV3 and SV4 open.

Thursday, June 25, 2020, 18:14: SV1 open.

Thursday, June 25, 2020, 18:17: SV1 closed.

Thursday, June 25, 2020, 18:17: SV5 open/close/open. Maximum vacuum 6e-6T. This is very closed to the hard-coded interlock. Everything is off, so it will be better to have the vacuum response at least near 4 or 5 e-6T.

Thursday, June 25, 2020, 18:26: SV3 closed.

Thursday, June 25, 2020, 18:31: SV4 closed.

Thursday, June 25, 2020, 18:41: SV5 closed. SV1 open. Wait 15 min

Thursday, June 25, 2020, 19:02: Vacuum response 5e-6.

Thursday, June 25, 2020, 19:02: Auto-ramping TGHT / TBHT to 580 / 290 A @ 2 A per min.

 The plan for today Friday, June 26, 2020 is:

1. Ramp up high voltage to operation values
2. Mass scan at nominal values
3. Send m=28 beam to FC6
4. Perform an efficiency measurement to know the correct work of the mini pump and also the time needed for 1 measurement.
5. Perform at least 3 efficiency measurements of the same configuration as a sanity check on the reproducibility of the measurements.

Friday, June 26, 2020, 11:31: BIAS/EZL/EE @ 30/13/1.5 kV. Anode @ 150 V

Friday, June 26, 2020, 11:58: Mass scan completed.

 Friday, June 26, 2020, 12:0: Magnet set to m=28. FC9=1.17e-9A. IG1=3.42e-6T

Friday, June 26, 2020, 12:17: SV3 closed.

Friday, June 26, 2020, 12:24: No effect on FC6 reading.

Friday, June 26, 2020, 12:24: SV4 closed.

Friday, June 26, 2020, 12:35: FC6=5.5e-10T and seems to  flatten.

Friday, June 26, 2020, 12:44: FC6=5.33e-10.

Friday, June 26, 2020, 12:45: SV5 closed. FC6=5.18e-10 and decreasing.

SV5 closes the gas line segment to the ion source. The response on the ion current indicates that once the leakage lines are closed, there is still some gas in the lines causing the slow decrease on ion current.

There is approximately a factor of 2 increase for m=28 when the argon is used.

Friday, June 26, 2020, 12:52: SV1 on.

Friday, June 26, 2020, 12:52: SV3 open/closed x5

Friday, June 26, 2020, 12:53: SV4 open/closed x5

Friday, June 26, 2020, 12:54: SV3 and SV4 opened.

Friday, June 26, 2020, 12:56: SV1 closed

Friday, June 26, 2020, 12:57: SV1 opened

Friday, June 26, 2020, 12:59 SV1 closed. SV5 open/closed x5

Friday, June 26, 2020, 13:00: SV5 opened.  No trip!!!

Ion current increases when the valve is open. This indicated the build up pressure being release into the ion source. Max FC6=4.17e-9 A. Now decreasing.

Friday, June 26, 2020, 13:07: FC6 reading and IG1 reading approaching values previous to efficiency measurement.

Friday, June 26, 2020, 13:13: FC6=1.17e-9A. IG1=3.47e-6.

Total time for 1 efficiency measurement 50 minutes. The largest wait occurs for the current to stabilize.

Approximately 30 minutes when closing the valves, 15 minutes when opening them, and 10 minutes for roughing the lines.

Friday, June 26, 2020, 13:30: Same measurement for (my) sanity check. FC6=1.16e-9. IG1=3.51e-6T

Friday, June 26, 2020, 13:30: SV3 closed.

Friday, June 26, 2020, 13:35: SV4 closed.

Friday, June 26, 2020, 13:50: SV5 closed.

Friday, June 26, 2020, 13:51: SV1 on. SV3 open/closed x5. SV4 open/closed x5.

Friday, June 26, 2020, 13:53: SV3 and SV4 opened.

Friday, June 26, 2020, 13:57: FC6=4.87e-10A. IG1=3.38e-6T.

Friday, June 26, 2020, 13:59: SV1 closed. SV5 open/closed x5.

Friday, June 26, 2020, 14:00: SV5 open. No trip!!!

Friday, June 26, 2020, 14:00: FC6=2.9e-9A. IG1=4.1e-6T. and decreasing.

Friday, June 26, 2020, 14:14: FC6=1.16e-9. IG1=3.56e-6T

Total time for eff measurement=45 minutes

Friday, June 26, 2020, 14:20: Last efficiency measurement for these values. Then lunch break.

Friday, June 26, 2020, 14:23: SV3 closed.

Friday, June 26, 2020, 14:29: SV4 closed.

 Friday, June 26, 2020, 14:42: SV5 closed.

Friday, June 26, 2020, 14:43: SV1 on. SV3 open/closed x5. SV4 open/closed x5.

Friday, June 26, 2020, 14:44: SV3 and SV4 opened

Friday, June 26, 2020, 14:49: FC6=4.71e-10. IG1=3.29e-6T.

 Friday, June 26, 2020, 14:51: SV1 closed. SV5 open/closed x5.

Friday, June 26, 2020, 14:52: SV5 open. No trip!!!

Friday, June 26, 2020, 14:52: FC6=3.2e-9A. IG1=4.13e-6T.

 Friday, June 26, 2020, 15:05: FC6=1.12e-9A. IG1=3.49e-6T.

Total time for eff measurement=43 minutes.

Friday, June 26, 2020, 15:33: By averaging all readings, the gas signal corresponds to 57.7% of the entire signal.  There is an increase factor of  2.36. No efficiency can be estimated as the signal is not from the gas bottle.

Friday, June 26, 2020, 15:43: Switching to mass 40 (Ar+1).

 Friday, June 26, 2020, 15:56: I think I am set on mass 40 (Ar+) The signal varies when  adjusting the voltage. Proceeding to efficiency measurement.

Friday, June 26, 2020, 15:59: FC6=2.49e-11. IG1=3.67e-6T

Friday, June 26, 2020, 16:00: SV3 closed.

Friday, June 26, 2020, 16:05: SV4 closed.

Friday, June 26, 2020, 16:20 : SV5 closed.

Friday, June 26, 2020, 16:20 : SV1 on. SV3 open/closed x5. SV4 open/closed x5.

Friday, June 26, 2020, 16:21 : SV3 and SV4 opened.

Friday, June 26, 2020, 16:21 : FC6=1.06e-11A. IG1=3.40e-6T

Friday, June 26, 2020, 16:24 : SV1 closed. SV5 open/closed x5.

Friday, June 26, 2020, 16:24 : SV5 open. No trip!!!

Friday, June 26, 2020, 16:25  FC6=3.7e-11. IG1=4.30e-6T

Friday, June 26, 2020, 16:28: The proportion between gas signal and background is 57.4% of the entire signal. Very similar result to  previous mass. There is also an increase factor of 2.35 for Ar+1

Friday, June 26, 2020, 16:37: FC6=2.44e-11. IG1=3.58e-6

Friday, June 26, 2020, 16:43: Coil=20 A. This provides the smallest ion current signal FC6=1.13e-11.

Friday, June 26, 2020, 16:49: FC6=1.13e-11. IG1=3.58e-6T.

Friday, June 26, 2020, 16:50: SV3 closed.

Friday, June 26, 2020, 16:54 :SV4 closed.

Friday, June 26, 2020, 17:09 :SV5 closed.

Friday, June 26, 2020, 17:10 :SV1 on. SV3 open/closed x5. SV4 open/closed x5.

Friday, June 26, 2020, 17:10 :SV3 and SV4 opened.

Friday, June 26, 2020, 17:10 :FC6=1.51e-12A. IG1=3.38e-6T

The proportion of this measurement is 86.63%.

Friday, June 26, 2020, 17:12 :SV1 closed. SV5 open/closed x5.

Friday, June 26, 2020, 17:12 :SV5 open. No trip!!!.

Friday, June 26, 2020, 17:22 :  FC6=3.7e-11. IG1=4.30e-6T

 Friday, June 26, 2020, 17:24:  FC6 reading keeps decreasing and it's already below the initial current.

I suspect that the ion current that was read when the coil was changed corresponds to superposition of previously ionized species and the coil adjusted those charges. Once flushed, the neutral atoms will established a new equilibrium.

NOTE: Will setting the anode to 0 V flushed the source? Test it tomorrow.

Friday, June 26, 2020, 17:43: FC6 signal is increasing. I'll leave it as is.

Saturday, June 27, 2020, 11:47: FC6=1.06e-11A. IG1=3.40e-6T. Similar to the value of the current prior to the efficiency measurement.

 The plan for today Saturday, June 27, 2020 is:

1. Perform an efficiency for coil 20. This might be a long measurement if the value has to increases again. If after 1.5 h the signal still shows a mismatch, then I'll try to flush the source by setting the anode to 0V
2. Redo efficiency measurement.
3. Try another coil value.

Saturday, June 27, 2020, 11:52: FC6=1.06e-11. IG1=3.40e-6T

Saturday, June 27, 2020, 11:55: SV3 closed.

Saturday, June 27, 2020, 12:03 : SV4 closed.

Saturday, June 27, 2020, 12:20 : SV5 closed.

Saturday, June 27, 2020, 12:20: SV1 on. SV3 open/closed x5. SV4 open/closed x5.

Saturday, June 27, 2020, 12:21 : SV3 and SV4 opened.

Saturday, June 27, 2020, 12:23 : FC6=6.76e-12A. IG1=3.14e-6T

Saturday, June 27, 2020, 12:26 : SV1 closed. SV5 open/closed x5.

Saturday, June 27, 2020, 12:27 : SV5 open. No trip!!!

Saturday, June 27, 2020, 12:42: FC6=1.01e-11A. IG1=3.38e-6T.

Saturday, June 27, 2020, 12:48Coil to 0, then to 20A. Anode voltage to 0V then to 150V. FC6=1.05e-11A.

Saturday, June 27, 2020, 12:50: SV3 closed.

Saturday, June 27, 2020, 12:55 : SV4 closed.

Saturday, June 27, 2020, 13:01: SV5 closed

Saturday, June 27, 2020, 13:01 : SV1 on. SV3 open/closed x5. SV4 open/closed x5.

Saturday, June 27, 2020, 13:02: SV5 closed.

Saturday, June 27, 2020, 13:04: TSG:CB1 and TPS:VCB3 tripped. now on

Saturday, June 27, 2020, 13:04: FC6=6.64e-12A. IG1=3.23e-6T.

Saturday, June 27, 2020, 13:05:  SV1 closed. SV5 open/closed x5.

Saturday, June 27, 2020, 13:07: SV5 open. No trip!!!

Saturday, June 27, 2020, 13:13: FC6=1.03e-11A. IG1=3.38e-6T.

Saturday, June 27, 2020, 13:15: Now I will sweep the coil from  0 to 20. Then run the efficiency measurement again.

Saturday, June 27, 2020, 13:22: Coil=15A provides the minimum current but I will stay with 20 A.

Saturday, June 27, 2020, 13:23 : SV3 closed

Saturday, June 27, 2020, 13:28 : SV4 closed.

Saturday, June 27, 2020, 13:37: SV5 closed.

Saturday, June 27, 2020, 13:42: FC6=6.60e-12A. IG1=3.23e-6T.

By averaging all the readings for coil 20. The proportion of current coming from the gas is only 36%. There is an increase factor of 1.56 compared to the no gas situation.

Saturday, June 27, 2020, 13:49: SV1 on. SV3 open/closed x5. SV4 open/closed x5.

Saturday, June 27, 2020, 13:51: SV1 closed. SV5 open/closed x5.

Saturday, June 27, 2020, 13:52: SV5 open. No trip!!!

Saturday, June 27, 2020, 14:08 : FC6=1.00e-11A. IG1=3.38e-6T.

Saturday, June 27, 2020, 14:10: Coil=40A. This values gives a similar current as coil=0A.

Saturday, June 27, 2020, 14:11: FC6=2.65e-11A. IG1=3.38e-6T.

Saturday, June 27, 2020, 14:19: SV3 closed.

Saturday, June 27, 2020, 14:26: FC6=2.45e-11.

Saturday, June 27, 2020, 14:27:SV4 closed.

Lunch break.

Saturday, June 27, 2020, 15:23: IG1=9.65e-12. IG1=3.20e-6T.

Saturday, June 27, 2020, 15:24: SV5 closed.

Saturday, June 27, 2020, 15:33: SV1 on. SV3 open/closed x5. SV4 open/closed x5.

Saturday, June 27, 2020, 15:34: SV3 and SV4 opened.

Saturday, June 27, 2020, 15:55: SV1 closed. SV5 open/closed x5.

Saturday, June 27, 2020, 15:56: SV5 open. No trip!!!

Saturday, June 27, 2020, 16:14: FC6=1.95e-11A. IG1=3.40e-6T.

Again, the base current with all the gas is note the same as prior to the effciciency measurment.

Saturday, June 27, 2020, 16:15 : Anode to 0V.

Saturday, June 27, 2020, 16:16 Anode=150 V. FC6=2.01e-11A.

Saturday, June 27, 2020, 16:18:Coil=0A.

Saturday, June 27, 2020, 16:19 Coil=40A. FC6=1.98e-11A.

Saturday, June 27, 2020, 16:20 Coil to 0. Anode to 0.

Saturday, June 27, 2020, 16:20 Anode=150V, coil=40A.

Saturday, June 27, 2020, 16:22: FC6=1.97e-11

Saturday, June 27, 2020, 16:32: Coil to 0. Anode to 0.

Saturday, June 27, 2020, 16:33: Coil=40A. Anode 150V.

Saturday, June 27, 2020, 16:34:FC6=1.97e-11A.

Saturday, June 27, 2020, 16:36: SV3 closed.

Saturday, June 27, 2020, 16:43: SV4 closed.

Saturday, June 27, 2020, 16:50: SV5 closed.

Saturday, June 27, 2020, 16:51: SV1 on. SV3 open/closed x5. SV4 open/closed x5.

Saturday, June 27, 2020, 16:52 :SV3 and SV4 opened.

Saturday, June 27, 2020, 16:55: FC6=7.64e-12. IG1=3.31e-6

Saturday, June 27, 2020, 16:56 : SV1 closed. SV5 open/closed x5.

Saturday, June 27, 2020, 16:57 : SV5 open. No trip!!!

 Saturday, June 27, 2020, 17:1: FC6=1.91e-11A

 What's FC6 value for coil=0?

Saturday, June 27, 2020, 17:17: Coil=0

 Saturday, June 27, 2020, 17:18: FC6=2.71e-11A.

Now coil=55A gives a similar current as coil=0... Back to coil=40A.

Saturday, June 27, 2020, 17:53: SV3 closed.

Saturday, June 27, 2020, 17:58: SV4 closed.

 Saturday, June 27, 2020, 18:07: SV5 closed.

FC6=7.47e-12A. IG1=3.23e-6T.

Saturday, June 27, 2020, 18:07 : The second set of measurements for coil=40. The proportion of current coming from the gas is 59.94%. There is an increase factor of  2.50 compared to the no gas situation.

Saturday, June 27, 2020, 18:07: SV1 on. SV3 open/closed x5. SV4 open/closed x5.

Saturday, June 27, 2020, 18:08: SV3 and SV4 opened.

Saturday, June 27, 2020, 18:18: SV1 closed. SV5 open/closed x5.

Saturday, June 27, 2020, 18:18 : SV5 open. No trip!!!

 Saturday, June 27, 2020, 18:4: FC6=1.84e-11. IG1=3.38e-6T.

 Saturday, June 27, 2020, 18:4: Done for today.

Sunday, June 28, 2020, 14:38: FC6=1.62e-11A. IG1=3.30e-6T.

 The plan for today Sunday, June 28, 2020 is:

1. Perform an efficiency  measurement for coil=65A.
2. Coil sweep with all gas lines closed.

 Sunday, June 28, 2020, 14:50: Coil=65A. Provides highest current. For coil<100A.

Sunday, June 28, 2020, 14:59: FC6=2.16e-11A. IG1=3.31e-6T.

Sunday, June 28, 2020, 15:08: SV3 closed.

Sunday, June 28, 2020, 15:13:FC6=1.94e-11.A.

Sunday, June 28, 2020, 15:14. SV4 closed.

Sunday, June 28, 2020, 15:30:SV5 closed.

Sunday, June 28, 2020, 15:30: FC6=3.82e-12A. IG1=3.14e-8T.

Sunday, June 28, 2020, 15:32: SV1 on. SV3 open/closed x5. SV4 open/closed x5.

Sunday, June 28, 2020, 15:32: SV3 and SV4 opened.

Sunday, June 28, 2020, 15:37:FC6=3.22e-12A. IG1=3.14e-6T.

Sunday, June 28, 2020, 15:38: SV1 closed. SV5 open/closed x5.

Sunday, June 28, 2020, 15:38: SV5 open. No trip!!!

Sunday, June 28, 2020, 15:55: FC6=1.79e-11A. IG1=3.31e-6T.

Sunday, June 28, 2020, 16:02: SV3 closed.

Sunday, June 28, 2020, 16:08: SV4 closed.

Sunday, June 28, 2020, 16:22: SV5 closed.

Sunday, June 28, 2020, 16:22: 3.31e-12A. IG1=3.05e-6T.

Sunday, June 28, 2020, 16:23: SV1 on. SV3 open/closed x5. SV4 open/closed x5.

Sunday, June 28, 2020, 16:24: SV3 and SV4 opened.

Sunday, June 28, 2020, 16:25: SV1 closed. SV5 open/closed x5.

Sunday, June 28, 2020, 16:25: SV5 open. No trip!!!

Sunday, June 28, 2020, 16:37: 1.82e-11. IG1=3.23-8T.

Sunday, June 28, 2020, 16:51:SV5 closed.

Sunday, June 28, 2020, 16:51:SV3 and SV4 closed.

Sunday, June 28, 2020, 17:25: Coil sweep finished .

Sunday, June 28, 2020, 17:26: SV1 on. SV3 open/closed x5. SV4 open/closed x5.

Sunday, June 28, 2020, 17:27: SV3 and SV4 opened.

Sunday, June 28, 2020, 17:28: SV1 closed. SV5 open/closed x5.

Sunday, June 28, 2020, 17:28 :SV5 open. No trip!!!

Sunday, June 28, 2020, 17:29: Coil=0A.

Sunday, June 28, 2020, 17:33: Done for the day.

 Reminder. Mini pump still linked to SV1. DO NOT OPEN SV2!!!

The plan for today Wednesday, July 01, 2020 () is:

1. Coil sweep with gas lines opened.
2. Coil sweep with gas lines closed
3. Coil sweep with gas lines opened.
4. Efficiency measurements at highest and lowest FC6 signal
5. Mass scan.

COVID-19 protocol: buddy is Marla Cervantes

New idea: Screenshot e-log on the ISAC TS team notebook: 20-07-01 FEBIAD development part 2  (Web view)

Wednesday, July 01, 2020, 11:50: FC6=6.89e-12A. IG1=2.76e-6T.

FC6 has dropped 60% and the vacuum 15% with the respect to the last set of measurements.

Maybe the mass is not Ar+ but K? Or the decrease in pressure has this large correlation to FC6 magnitude.

Wednesday, July 01, 2020, 12:41: Coil sweep up and down completed.

Wednesday, July 01, 2020, 12:47: SV3, SV4, and SV5 close

IG1=2.59e-6T. The gas bottles are definitely running out, as there is no much change in pressure whether they are opened or closed

Wednesday, July 01, 2020, 13:15: Coil sweep completed.

Wednesday, July 01, 2020, 13:22: FC6 and IG1 increasing. Probably due to the coil still at 90A. reducing coil current.

Wednesday, July 01, 2020, 13:29: SV1 open. SV3 open/closed x5. SV4 open/closed x5.

Wednesday, July 01, 2020, 13:31: SV3 and SV4 open.

Wednesday, July 01, 2020, 13:32: SV1 closed. SV5 open/closed x5.

Wednesday, July 01, 2020, 13:33 SV5 open. No trip!!!

Wednesday, July 01, 2020, 14:30: Coil=0A.

Wednesday, July 01, 2020, 14:34 : SV3 closed.

Wednesday, July 01, 2020, 14:37:SV4 closed.

Coffee break.

Wednesday, July 01, 2020, 14:54: FC6~~9.76E-13A. IG1= 2.44e-6T

Wednesday, July 01, 2020, 15:11:SV1 open.  SV3 open/closed x5. SV4 open/closed x5.

Wednesday, July 01, 2020, 15:13:  SV3 and SV4 open.

Wednesday, July 01, 2020, 15:30: SV1 closed. SV5 open/closed x5.

Wednesday, July 01, 2020, 15:30: SV5 open. No trip!!!

Wednesday, July 01, 2020, 15:52: Coil=90A. FC6=1.41e-11A . IG1=2.68e-6T.

Wednesday, July 01, 2020, 15:57: FC6=1.16e-11A. IG1=2.68E-6T.

Wednesday, July 01, 2020, 15:58: SV3 closed.

Wednesday, July 01, 2020, 16:03: SV4 closed.

Wednesday, July 01, 2020, 16:07: 4.95e-12A. IG1=2.77e-6T.

Pressure increasing.

Wednesday, July 01, 2020, 16:14:SV1 open. FC6 decreasing momentarily, now increasing again due to the pressure increase.

Wednesday, July 01, 2020, 16:15: SV3 open/closed x5. SV4 open/closed x5.

IG1=3.1e-6T. FC6=6.00e-12A. Seems table now.

Wednesday, July 01, 2020, 16:17: SV3 and SV4 open.

Wednesday, July 01, 2020, 16:20: SV1 closed. SV5 open/closed x5.

Wednesday, July 01, 2020, 16:20: SV5 open. No trip!!!

 Wednesday, July 01, 2020, 16:44: FC6=1.12e-11A. IG1=3.14e-6T.

Wednesday, July 01, 2020, 17:40: Mass scan completed. Peaks are really bad resolved.

Wednesday, July 01, 2020, 17:43;FC0 in. Coil=0A.

Wednesday, July 01, 2020, 17:43: Done for the day

1. Increase cathode current to 310A.
2. Anode voltage sweep.
3. Mass scan at nominal values.
4. Coil sweep with gases
5. Efficiency measurement at highest coil current.
6. Coil sweep without gas.
7. Mass scan without gas.

 Thursday, July 02, 2020, 08:03: IG1=2.68e-6T. Vacuum decreased overnight, reading on FC0 decreased as well.

Thursday, July 02, 2020, 08:11: Auto-ramp TBHT to 310A @ 2A/min 

 Thursday, July 02, 2020, 09:15: FC0 increasing

Thursday, July 02, 2020, 10:30: FC0 seems to be stable now on 5.51e-9A. 

Thursday, July 02, 2020, 11:10: Mass scan completed.

 Thursday, July 02, 2020, 11:26: Mass=40.

Thursday, July 02, 2020, 13:47: Coil sweep completed.

Thursday, July 02, 2020, 13:48: Coil=90A. FC6=1.35e-10A. IG1=2.76e-6T.

Thursday, July 02, 2020, 13:49: SV3 closed.

Thursday, July 02, 2020, 13:52: SV4 closed.

Thursday, July 02, 2020, 14:00: SV5 closed.

Thursday, July 02, 2020, 14:02:  FC6=5.80e-11A. IG1=2.59e-6T.

Thursday, July 02, 2020, 14:08 : SV1 open.  SV3 open/closed x5. SV4 open/closed x5.

Thursday, July 02, 2020, 14:09:  SV3 and SV4 open.

Thursday, July 02, 2020, 14:11: SV1 closed. SV5 open/closed x5.

Thursday, July 02, 2020, 14:11: SV5 open. No trip!!!

Thursday, July 02, 2020, 14:30: FC6=1.40e-10A. IG1=2.96e-6T.

Thursday, July 02, 2020, 14:32: SV3 closed.

Thursday, July 02, 2020, 14:35 : SV4 closed.

Thursday, July 02, 2020, 14:50 : SV5 closed.

Thursday, July 02, 2020, 15:28:  FC6=3.34e-11A. IG1=2.59e-6T.

Thursday, July 02, 2020, 16:05: Coil sweep without gases finished.

 Thursday, July 02, 2020, 16:35: Mass scan finished.

Thursday, July 02, 2020, 16:51: Coil=90A.

Thursday, July 02, 2020, 17:07: Mass scan completed.

Thursday, July 02, 2020, 17:07 : SV1 open.  SV3 open/closed x5. SV4 open/closed x5.

Thursday, July 02, 2020, 17:09:  SV3 and SV4 open.

Thursday, July 02, 2020, 17:10: SV1 closed. SV5 open/closed x5.

The mini-pump line was open for a moment while SV5 was opened, there was no trip but this might have added air into the system.

Thursday, July 02, 2020, 17:13: SV5 open. No trip!!!

Thursday, July 02, 2020, 17:21: FC6=4.10e-11A. IG1=2.76e-6T.

Thursday, July 02, 2020, 17:38: Mass scan completed.

Thursday, July 02, 2020, 17:40: Coil=0A.

Thursday, July 02, 2020, 17:56: Mass scan finished.

Thursday, July 02, 2020, 17:57: Done for the day.

1. Emittance scans at difference coil values.

Friday, July 03, 2020, 11:45: Coil=0. Mass=40u

Friday, July 03, 2020, 11:45: FC6=4.12e-11A. IG1=2.72e-6T.

Friday, July 03, 2020, 12:13: Coil=0. Mass=28u. FC6=7.88e-10A. IG1=2.74e-6T.

 Friday, July 03, 2020, 12:25: Test Stand tripped and the lights around flicker. EPICS whiteout. Even turbos shut off.

Friday, July 03, 2020, 12:27: Called control room and they told that there were a couple of power bumps.

Friday, July 03, 2020, 12:41: EPICS restarted but still whiteout problem similar to e-log 702. Likely to submit a faulty report

Friday, July 03, 2020, 12:57: PLC restarted, EPICS workings.

Friday, July 03, 2020, 12:58: Turbos at speed.

Friday, July 03, 2020, 13:25: Source/Optics on.

Friday, July 03, 2020, 13:36: BIAS/EZL/EE @ 30/13/1.5 kV.

Friday, July 03, 2020, 13:39: IG1=2.15e-6T.

Friday, July 03, 2020, 13:41: Auto-ramping TGHT/TBHT to 400/200A @ 2A/min for the weekend.

Friday, July 03, 2020, 13:44: Done for the day. To continue on Monday.

Reminder. Mini pump still linked to SV1. DO NOT OPEN SV2!!!

1. Ramp up TGHT/TBH to 580/315 A.
2. Anode sweep
3. Mass scan without gas.
4. Coil sweep without gas
5. Gases in.
6. Mass scan with gases
7. Coil sweep with gasses
8. Efficiency measurements at highest and lowest FC6 current

COVID-19 protocol: buddy is Marla Cervantes

New idea: Screenshot e-log on the ISAC TS team notebook: 20-07-06 FEBIAD development part 3  (Web view)

Monday, July 06, 2020, 05:27: Auto-ramping TGHT/TBHT to 580/315 @ 2 A/min.

 Monday, July 06, 2020, 14:2: IV4 open.

Monday, July 06, 2020, 14:41: Anode sweep completed. No anode current registered.

Monday, July 06, 2020, 14:42:  HV spark. Anode current now show something. 13.431 mA. The source current however did not change after the spark.

Monday, July 06, 2020, 15:08: Anode sweep completed.

Monday, July 06, 2020, 15:19: IG1=2.57e-6T. 

Monday, July 06, 2020, 15:43: Mass scan completed.

Monday, July 06, 2020, 16:02: Coil sweep completed.

Monday, July 06, 2020, 16:04: FC6=8.40e-11A. IG1=2.59e-6T.

Monday, July 06, 2020, 16:07: SV1 closed. SV3 and SV4 open/closed x5.

Monday, July 06, 2020, 16:10: SV3 and SV4 open.

Monday, July 06, 2020, 16:12: SV1 closed. SV5 open/closed x5.

Monday, July 06, 2020, 16:13: SV5 open. No trip!!!

Monday, July 06, 2020, 16:25: FC6=1.16e-10A. IG1=2.74e-6T.

Monday, July 06, 2020, 16:33: Closing gas lines to prevent more leakage.

Tomorrow I will move to mass 40, to see if the ionization changes with the small gas load.

Monday, July 06, 2020, 16:36: Done for the day.

1. Gases in.
2. Mass scan with gases
3. Coil sweep with gasses
4. Efficiency measurements at highest and lowest FC6 current

Tuesday, July 07, 2020, 13:38:FC6=4.46e-11A. IG1=2.41e-6T.

SV3 and SV4 open/closed x5.  SV1 open.

Tuesday, July 07, 2020, 13:40: SV3 and SV4 open.

Tuesday, July 07, 2020, 13:41: SV1 closed. SV5 open/closed x5.

SV5 open. No trip!!!

Tuesday, July 07, 2020, 13:57: FC6=8.46e-11A. IG1=2.59e-6T.

Tuesday, July 07, 2020, 14:15: Mass scan completed.

Tuesday, July 07, 2020, 14:22: mass=39.82. A slight bump between the potassiums 38 and 41.

Tuesday, July 07, 2020, 14:38: Coil sweep completed.

Coil=0A. FC6=1.18e-11A. IG1=2.59e-6T.

Tuesday, July 07, 2020, 14:39: SV3 closed.

Tuesday, July 07, 2020, 14:47: FC6=1.26e-11A. IG1=2.59e-6T.

Tuesday, July 07, 2020, 14:48: SV4 closed.

Tuesday, July 07, 2020, 14:59: 1.15e-11A. IG1=2.41e-6T.

Tuesday, July 07, 2020, 15:00: SV5 closed.

Tuesday, July 07, 2020, 15:07: FC6=1.15e-11A. IG1=2.41e-6T.

Tuesday, July 07, 2020, 15:08: SV3 and SV4 open/closed x5. SV1 open.

Tuesday, July 07, 2020, 15:09: SV3 and SV4 open. SV1 closed.

Tuesday, July 07, 2020, 15:10:  SV5 open/closed x5. SV5 open. No trip!!!

Tuesday, July 07, 2020, 15:2: FC6=1.26e-11A. IG1=2.59e-6T.

Tuesday, July 07, 2020, 15:32: SV3 closed.

Tuesday, July 07, 2020, 15:44: FC6=1.4e-11A. IG1=2.57e-6T

Tuesday, July 07, 2020, 15:44: SV4 closed.

Tuesday, July 07, 2020, 16:01: FC6=1.15e-11A. IG1=2.39e-6T.

Tuesday, July 07, 2020, 16:01: SV5 closed.

 Tuesday, July 07, 2020, 16:31: Coil sweep with no gas completed.

Tuesday, July 07, 2020, 16:52: Mass scan completed.

Tuesday, July 07, 2020, 16:52: Done for the day.

1. Ramp up TBHT to 580/320 A.
2. Anode sweep
3. Mass scan without gas.
4. Coil sweep without gas
5. Gases in.
6. Mass scan with gases
7. Coil sweep with gasses
8. Efficiency measurements at highest FC6 current
9. Coil sweep without gas

Wednesday, July 08, 2020, 15:00: IG1=2.41e-6T.

 Wednesday, July 08, 2020, 15:29: Auto-ramping TBHT to 320A @ 2A/min.

Wednesday, July 08, 2020, 15:54: Anode sweep completed.

Wednesday, July 08, 2020, 16:33: Mass scan completed

Wednesday, July 08, 2020, 16:56: Coil completed.

Wednesday, July 08, 2020, 16:57. IG1=2.59e-6T. FC6=8.63e-11A.

Wednesday, July 08, 2020, 16:58: SV3 and SV4 open/closed x5. SV1 open.

Wednesday, July 08, 2020, 16:59: SV3 and SV4 open. SV1 closed.

Wednesday, July 08, 2020, 17:01: SV5 open/closed x5. SV5 open. No trip!!!

Wednesday, July 08, 2020, 17:12: FC6=9.20e-12A. IG1=2.65e-6T.

Wednesday, July 08, 2020, 17:44: Mass scan completed.

FC6=8.61e-12A. IG1=2.65e-6T.

Wednesday, July 08, 2020, 18:14: Coil sweep completed.

FC6=5.52e-11A. IG1=2.68e-6T.

Wednesday, July 08, 2020, 18:19: SV3 closed.

Wednesday, July 08, 2020, 18:25: FC6=6.8e-11A. IG1=2.65e-6T

Wednesday, July 08, 2020, 18:25: SV4 closed.

Wednesday, July 08, 2020, 18:39 : FC6=1.70e-11A. IG1=2.59e-6T.

Wednesday, July 08, 2020, 18:40 : SV5 closed.

Wednesday, July 08, 2020, 19:08: FC6=1.32e-11A. IG1=2.59e-6T.

Wednesday, July 08, 2020, 19:12: Sudden TBHT current increase of approx 2A. TBHT voltage seem to have droped a little 0.02V.

Wednesday, July 08, 2020, 19:14: Coil=0A. I'll wait until IG1 reading stabilizes.

Wednesday, July 08, 2020, 19:31: FC6=8.09e-12. IG1=2.48e-6T.

Wednesday, July 08, 2020, 19:31: TBHT returned to values  pior to sudden jump.

Wednesday, July 08, 2020, 19:58: Coil sweep with no gas completed.

Wednesday, July 08, 2020, 19:58: Done for the day.

1. Ramp down TBHT to 580/290 A.
2. Anode sweep
3. Coil sweep without gas
4. Gases in.
5. Coil sweep with gases
6. Ramp down test stand

Thursday, July 09, 2020, 09:53: Manually tap down TBHT to 290A @ ~~2A/min 

Thursday, July 09, 2020, 11:02: Anode sweep completed.

Thursday, July 09, 2020, 13:15: Coil=0A. IG1=2.24e-6T. FC0=2.48e-10A. FC6=7.43e-12A.

Thursday, July 09, 2020, 14:15: SV3 and SV4 open/closed x5. SV1 open.

Thursday, July 09, 2020, 14:16: SV3 and SV4 open. SV1 closed.

Thursday, July 09, 2020, 14:17 : SV5 open/closed x5. SV5 open. No trip!!!

Thursday, July 09, 2020, 14:31: FC6=3.03e-11A. IG1=2.50e-6T.

Thursday, July 09, 2020, 14:54: Coil sweep completed.

Thursday, July 09, 2020, 15:16: Anode=0 V.

Thursday, July 09, 2020, 15:16: SV3, SV4, SV5 closed

Thursday, July 09, 2020, 15:18: IV4 closed. timeout, reset it

Thursday, July 09, 2020, 15:20: BIAS/EZL/EE 0 kV.

Thursday, July 09, 2020, 15:21: Auto-cooling 2 A/min

Thursday, July 09, 2020, 15:25: Done for the day.

Monday, July 13, 2020, 07:01: Ion gauge & Turbo pumps off. Noted HV cage is already removed & PS locked out.

Tuesday, September 01, 2020, 14:00:

New tubing installed.

Blue on FS#4 loop (A)(B)

Yellow on FS#2 Loop (C)(D)

Yesterday, December 1st, I successfully installed and tested the gas system inside the faraday cage.

The changes performed were as follows:

• Remove He gas tank (to make room for new tank)
• Remove calibrated leak to connect new gas line
• Remove convectron gauge to install a high range dial manometer.

The tests were done manually and consisted as follows:

• Gas lines roughed by opening SV1.
• Tank regulator set to deliver 1 bar
• SV4 opened to allow the gas to enter the lines
• Dial manometer verified to  match the pressure set by the regulator
• Alternatively roughed and pressurized the lines by opening/closing SV1/SV4
• Tank lines emptied with SV1 and SV4 open simultaneously.

The test involve the lines up to SV5. The gas line portion from SV5 to the top of the HV cage was not included as it was removed for TM3 HV tests (se entry #822)

When the HV tests are concluded I will install a new line that will include a gauge.

Friday, December 04, 2020, 13:34

Vacuum is at 3.6e-6 Torr and possibly still dropping. Starting HV tests with just a tube and wire hanging down from the feedthrough. Turned on power supply and started raising voltage.

Friday, December 04, 2020, 15:13

Achieved 75 kV. No sparking at any point along the way. Vacuum is around 3.1e-6 Torr. Will hold for about 30 minutes to confirm.

Friday, December 04, 2020, 16:07

Held 75 kV for ~35 minutes. Ramped down and shut off power supply. Vacuum is at 2.7e-6 Torr.

Fernando Maldonado wrote:

Wednesday, October 30, 2019, 14:49: John C. changed the polarity of the anode power supply to negative, and Fernando M. rewired the cabling on the service cap.

 Wednesday, January 20, 2021, 11:26: John Chow verified that the power supply was in negative mode.

Just as side note, I think the PS was in negative mode since the quoted entry from October 30 2019. Given that the SiC/FEBIAD was supposed to run in cathode mode, the test stand was rewired to this. The only rewiring after this was for the P2N.

 Thursday, January 21, 2021, 10:05: Anodeless Negative Bias On Surface Ion  Source, or ANBOSIS (still working on the acronym). installed to test energy spread vs position.

The SIS allow a more forgiving operation while calibrating such that other sources can have these type of measurements.

 Thursday, January 21, 2021, 10:43: Electrical connection make sense inside the source tray both with and without TIS. Anode confirmed to be on HV common through 9-pin.

Thursday, January 21, 2021, 10:46: Roughing.

Thursday, January 21, 2021, 11:17: Turbos on. 

Thursday, January 21, 2021, 11:25: IG1 on. 

 Thursday, January 21, 2021, 12:52: IG1@2.67e-5 T

AS

Friday, January 22, 2021, 07:04: Vacuum @ 4.57e-06T.

Friday, January 22, 2021, 07:07: FS#2 open. Vacuum ok @ 4.57e-06T

Friday, January 22, 2021, 07:13: FS#3 Open. Vacuum ok @ 4.57e-06T

Friday, January 22, 2021, 07:24: FS#4 Open. Vacuum ok @ 4.48e-06T

Friday, January 22, 2021, 07:30: FS#5 Open. Vacuum ok @ 4.48e-06T

Friday, January 22, 2021, 07:39: Reboot IOC (Optics page has a white out)

Friday, January 22, 2021, 07:44: Power / Sources on.

Friday, January 22, 2021, 07:49: Reboot PLC / IOC again. Surface source page ok. Optics page still in white out.

Friday, January 22, 2021, 07:52: Controls to TGHT / TBHT non-responsive. 10 / 5 A on TGHT / TBHT @ 0 / 0 A on epics & the PS.

Friday, January 22, 2021, 08:15: Tested HV. OK on both EZL & BIAS w/ 500 V each, then back to 0 V. TGHT / TBHT still not responding.

AS

Friday, January 29, 2021, 09:52: TS checks ok. Fixed. TGHT /  TBHT @ 10 A each. BIAS / EE / EZL @ 500 / -200 / 300 V to check.

 https://elog.triumf.ca/TIS/Test-Stand/842

Friday, January 29, 2021, 09:53: Auto-ramping TGHT / TBHT to 350 / 150 A @ 2 A per min.

Friday, January 29, 2021, 10:05: BIAS / EE / EZL @ 30 /-1.5/13 kV.

Friday, January 29, 2021, 10:08: Lot's of sparking*** Reduce BIAS / EE / EZL to 20 / -1.5 / 10 kV.

 FM

Friday, January 29, 2021, 11:24: BIAS / EE / EZL @ 29 /-1.5/13 kV.. No Sparks. Ramping up to 30 kV in steps of 100V.

Friday, January 29, 2021, 11:28: Reached 30kV on bias. No sparks after 2 minutes. Previously, the sparks happened within seconds after reaching 30 kV, according to the striptool.

Friday, January 29, 2021, 11:41: There were  five inaudible sparks. They are likely occurring inside as the target-ion source is being heated. Small rise in vacuum occurred and then the spark started.

Friday, January 29, 2021, 11:42: BIAS / EE / EZL to 0.000 kV to allow outgassing

Friday, January 29, 2021, 12:44  Auto-ramping TGHT / TBHT to 500 / 200 A @ 4 A per min.

Friday, January 29, 2021, 13:32: TGHT/TBHT @500/200 A.

Friday, January 29, 2021, 13:44. Spark on top.

Friday, January 29, 2021, 13:48 : BIAS / EE / EZL @ 30 /-1.5/13 kV.

Friday, January 29, 2021, 13:49: Anode gets current limited even at 1 V.  Could this indicate a short, or that the anode is floating?

Friday, January 29, 2021, 13:53: Spark across extraction electrode spark gap.

Friday, January 29, 2021, 14:13: Auto-ramping TBHT to 225 A @ 3 A per min.

Friday, January 29, 2021, 14:32: 10 min ago, the IG6 timed out. Nothing tripped but the epics couldn't restarted. Manually turned Fil1 on controller but didn't work. Fil2 did the trick. Back to normal.

Friday, January 29, 2021, 14:42: Spark gap again. It turned the separator section yellow (except MB1)"

Friday, January 29, 2021, 15:08: Auto-ramping TGHT to 580 A @ 2 A per min. Good vac level set to 3.5e-7T

Friday, January 29, 2021, 15:17: Inaudible spark. First spark after 25 min.

Friday, January 29, 2021, 15:30: Playing with TBHT current. Couple of sparks when playing with the steerers and einzel lens. TGHT auto-ramp waiting for good vacuum.

Friday, January 29, 2021, 16:25: Vacuum reached bad vaccum level. Currentes were step back. No sparks for around 40 minutes.

Friday, January 29, 2021, 16:41: System seems to be dirty. It will likely take the weekend to reach nominal vacuum levels.

I will reduce the HV and keep the heaters on. I will keep an eye during the weekend.

Friday, January 29, 2021, 16:44: 50 minutes without sparks

Friday, January 29, 2021, 16:46:  BIAS / EE / EZL to 0.000 kV to allow outgassing during the weekend.

Saturday, January 30, 2021, 11:59: Vacuum has steadily decrease over time allowing the auto ramp-up routine to make progress.

Saturday, January 30, 2021, 12:00 IG1 @ 3.58e-6T . TGHT/TBHT @  566/230 A. All voltage still at 0 V.

Saturday, January 30, 2021, 12:56: TGHT/TBHT @ 580/230 A. 

Sunday, January 31, 2021, 09:32: TGHT/TBHT @ 580/230 A. IG1@2.59e-6T. 

Sunday, January 31, 2021, 10:48:  BIAS / EE / EZL @ 30 /-1.5/13 kV. No sparks on the way up. Beam is now noticeable on the wire scanners, When I first tried with colder target current no beam.

Sunday, January 31, 2021, 13:31: After around 3 hours, only two sparks have occurred.

Sunday, January 31, 2021, 13:54: Spark. All of them seem to be going to EZL. 

Sunday, January 31, 2021, 15:13: Spark. Separators optics turned yellow. 

Sunday, January 31, 2021, 15:38: Spark. 

Sunday, January 31, 2021, 16:11: Things were looking good so i  decided t o try  a mass scan , however a series of sparks started. I set all biases to 0 and stop the tests for today.

On Tuesday the hard good vacuum level was changed from 7e-6 T to 1e-5 T to allow larger leak rates when testing FEBIAD.

Also this new level should allow faster heating rates (be mindful and cautious)

Work done as per WP C2021-01-19-9

See e-log entry: 884:

Thursday, February 04, 2021, 18:45: Roughing

Thursday, February 04, 2021, 19:13: Turbos on.

Thursday, February 04, 2021, 19:22: IG1 on.

AS

Friday, February 05, 2021, 06:20: Waterline FS#5 open. Vacuum ok @ 1.71e-06T.

Friday, February 05, 2021, 06:23:

Friday, February 05, 2021, 06:26: Tried to put 100 - 1000 V on the BIAS. Goes to 0.0 kV - BIAS:RDVOL / 0.029 mA - BIAS:RDCUR, straight to current limit. BIAS is shorted.

Friday, February 05, 2021, 06:32: Power / Sources / Optics off. Ion gauge & Turbo pumps off.

Friday, February 05, 2021, 07:28: Venting.

Friday, February 05, 2021, 08:37: Roughing. Target was re-salted. GE line was close/light touch to (B) line. Adjusted. Waterlines open on FS#5.

Friday, February 05, 2021, 09:06; Turbo pump TP1B on.

Friday, February 05, 2021, 09:14: Turbo pump TP1A on

Friday, February 05, 2021, 09:19: TP1A tripped. Wait on backing pressure.

Friday, February 05, 2021, 09:35: Vacuum Bypass on BV1A to turn on TP1A.

Friday, February 05, 2021, 09:39: TP1A at speed. Ion gauge on. Bypass removed.

Friday, February 05, 2021, 09:55: IG1 off. Bypass used on IG1. EE on, BIAS on.

Friday, February 05, 2021, 09:56: 500 - 1000 V - BIAS:RDVOL / 0.000 mA - BIAS:RDCUR. Ok.

Friday, February 05, 2021, 09:58: BIAS & EE off. Bypass removed. IG1 back on. Initial check ok. Vacuum to go below 1.0e-05T.

Friday, February 05, 2021, 11:37: Power / Sources / Optics on & set. Vacuum @ 6.46e-06T.

Friday, February 05, 2021, 11:42: BIAS / EE / EZL @ 10 / -1.0 / 7.5 kV

Friday, February 05, 2021, 11:50: BIAS / EE / EZL @ 20 / -1.5 / 13 kV. TGHT / TBHT @ 10 / 10 A.

Friday, February 05, 2021, 11:58: BIAS / EE / EZL @ 25 / -1.5 / 13 kV. TGHT / TBHT @ 10 / 10 A. Anode checked up to 100 V & down again. Ok.

Friday, February 05, 2021, 12:06: BIAS / EE / EZL @ 30 / -1.5 / 13 kV. TGHT / TBHT @ 10 / 10 A.

Friday, February 05, 2021, 12:14: BIAS / EE / EZL @ 35 / -1.5 / 13.5 kV. TGHT / TBHT @ 10 / 10 A.

Friday, February 05, 2021, 12:24: It charged up and began sparking continuously around 12:23.

Friday, February 05, 2021, 12:33: BIAS / EE / EZL @ 15 / -1.0 / 10 kV. TGHT / TBHT @ 10 / 10 A. The sparks were both clearly audible & visible on the spark gap up top (Image to be included in word doc)

FM

Friday, February 05, 2021, 14:16:   BIAS / EE / EZL @ 30/ -1.5 / 13 kV.  Anode @ 50 V.

Friday, February 05, 2021, 14:18: Auto ramp-up TGHT/TBHT to 580/230 A @ 4A/min

Friday, February 05, 2021, 15:08: Anode shorted, I think the  tube heater is touching the plasma electrode. TGHT/TBHT @ 209/209 A. TBHT voltage= 2.2. At the same time the bias current jump from 0.008 to 0.01.

Friday, February 05, 2021, 15:12: Reducing the TBHT to 190 A 2 V. Bias current linearly reducing with tbht current. The cathode is not current limited anymore. Wondering if the TBHT power supply is causing an electrical backflow or if the ion source is touching the plasma electrode.

Friday, February 05, 2021, 15:16: Auto ramp-up TGHT/TBHT to 580/230 A @  2 A/min

Friday, February 05, 2021, 15:21: The same effect as before at TBHT=223 A. When reducing to 190 A, anode goes up. 

Friday, February 05, 2021, 15:30:  Auto ramp-up TGHT to 580 A @ 4A/min and TBHT to 230 @ 1 A/min. 

Friday, February 05, 2021, 15:55: Sparks, not audible nor visible. I think I saw one on the top part of the water blocks. Lowering bias to 10 kV.

Friday, February 05, 2021, 15:56 : Auto-ramp range to 4A/min on both TGHT and TBHT

Friday, February 05, 2021, 19:23:  almost 2.5 hours without sparks. RPM tests performed. Voltages to zero. Will rise later or tomorrow remotely.

Taped down to 180/500 A on TBHT/TGHT. All voltages to  BIAS / EE / EZL @ 0.000 kV.

Saturday, February 06, 2021, 11:14:   Auto ramp-up TGHT/TBHT to 580/230 A @ 4A/min

Saturday, February 06, 2021, 12:16:    BIAS / EE / EZL @ 30/ 1.5 / 0kV.  

Saturday, February 06, 2021, 12:30: The previous tune is not working anymore. I have to re-tune . EZL now helps to have a better tune, no need for extreme steering

Well well well, after several scans I observed the following:

• Bias readback changes by 14  V. This doesn't necessarily means this is the absolute value, it could be better or worse.
• Magnet oscillates around 1 gauss, enough to move the beam to the sides.
• Different settings on the rpm scans does not yield to different results in the data
• Intensity variations causes one of the rpms scans to be lower or higher.
• Total source scans are always mirrored as long as nothing else varies.
• Separated ion scans varied wildly. No two consecutive scans are the same. Likely a combination of Bias voltage and magnet current ripples.
• Following Baartman's proceedure on a cherry-picked data set, I estimated an energy spread of 11.75 eV. To be discussed with him

Saturday, February 06, 2021, 20:00 Biases to 0.000 kV

Saturday, February 06, 2021, 20:00 : Auto-cooling TGHT/TBHT  to  400/150 A @ 3 A/min

 Saturday, February 06, 2021, 21:02: On the way down, TBHT 150  A and when TGHT cross 480 A the anode came back to life. Wonder if this could help diagnose deflection on the surface ion source (might be helpful for the P2N)

Sunday, February 07, 2021, 08:26:  Auto ramp-up TGHT/TBHT to 560/210 A @ 2A/min

Sunday, February 07, 2021, 09:18: Anode got current limited again when TGHT/TBHT @ 446/200 A 

Sunday, February 07, 2021, 11:26:  Auto ramp-up TGHT/TBHT to 560/210 A @ 2A/min 

 Sunday, February 07, 2021, 11:31: Once again, the latest tune did not work. I suspect the ion source deformation varied from thermal cycle to thermal cycle. With a crooked beam, the EZL will send the beam off-center and the quad will not compensate that. The double peak observed in the beam size scan indicates that the focusing is not correct.

Sunday, February 07, 2021, 18:41: With Baartman RPM scans, the x axis in in cm, as verified with an emittance scan.

New parameters on the emittance rig for this tune. Offset from 40 to -50. This shifts the phase space in the y axis such that is visible on the plot. 

Even in a different mass, the position scans on the dispersion plan are not reproducible.

Sunday, February 07, 2021, 18:52: Auto-cooling TGHT/TBHT to 400/150 A  @ 6A/min / 3 A/min, respectively.

 Sunday, February 07, 2021, 18:53: Biases to 0.000 kV

I think the fast cool-down rate prevented the TBHTto be able to sustained voltage.

Sunday, February 07, 2021, 19:35: Auto-cooling TGHT/TBHT to 0 A @ 3A/min 

TBHT able to sustain voltage once TBHT=191 A and TGHT=372 A

Monday, February 08, 2021, 07:14: IV4 close

Monday, February 08, 2021, 07:15: IG1 off. Turbos off. 

Thursday, February 18, 2021, 15:01: With the help of Spencer Kiy, we tested the proper communication from python to epics.

Getting TSP:Q1 PV: successful both from the web application and jupyter notebook.

Setting TSP:Q1 PV: successful from the web application, failed jupyter notebook.

Issue fixed on the HLA server side

Setting TSP:Q1 PV: successful both from the web application and jupyter notebook.

Testing other potentially useful apps for ramping routines and a  customized "striptool".

HLA developments only available from the ISAC test stand's PC and Fernando's PC.

Monday, February 22, 2021, 17:48 Roughing

Monday, February 22, 2021, 18:17: Turbos on.

Monday, February 22, 2021, 18:25: IG1 on.

Monday, February 22, 2021, 19:01: Gas lines refilled with |50 kPa| or argon. Gauge reads -40kPa.

Monday, February 22, 2021, 19:01: IG1@3.48e-5T

Monday, February 22, 2021, 19:01: Waterlines open

Monday, February 22, 2021, 19:06: IG1 @ 3.04e-5 T.

Tuesday, February 23, 2021, 08:34: IG1@1.56e-6T.

Tuesday, February 23, 2021, 08:43: BIAS/EZL/EE @ 30/13/1.5 kV, anode bias @ 200 V. No problems with the bias ramp up.  I will wait some time in here just to make sure it's OK, but it looks like the problem is solved now.  

Tuesday, February 23, 2021, 08:52:  BIAS/EZL/EE/AND @ 0.000 kV.

Tuesday, February 23, 2021, 08:55: Auto-ramp up TGHT/TBHT to 580/290 @ 4A/min 

Tuesday, February 23, 2021, 09:35:  Gauge reads -20kPa, that is, there was  a 20 kPa air incursion over 18 hours.

Tuesday, February 23, 2021, 9:36: Roughing and re-filling the gas lines. Gauge reads again -40 kPa 

 Tuesday, February 23, 2021, 11:30: BIAS/EZL/EE @ 30/13/1.5 kV, anode bias @ 200 V.

Tuesday, February 23, 2021, 11:31: IV4 open.

Tuesday, February 23, 2021, 11:47: Sparks when anode is @ 500 V. 

AS

Tuesday, February 23, 2021, 14:18: Mass & wire scans taken. Word doc attached.

FM

Tuesday, February 23, 2021, 22:17: All afternoon and evening running my code to get systematic measurements. They are still going but in summary:

For TGHT=580 A and TBHT=290 A, the temperature estimation is 1740 C, which is extremely cold for a FEBIAD. This explains why with this assembly I need to go around 310 to get something reasonable.

Tuesday, February 23, 2021, 22:52: Between 100 and 200 V the current always increases with coil current  > 50 A. The maximum increase factor is around 4. As the voltage increases the current stops increases at coil >50A.

 Tuesday, February 23, 2021, 23:59: Refilling gas lines.

TBHT to 310

Wednesday, February 24, 2021, 02:21: BIAS/EZL/EE/AND @ 0.000 kV:

Wednesday, February 24, 2021, 02:22: lowering tght/tbht to 520/250@ 4 A/min. 

Wednesday, February 24, 2021, 09:18: Opening cage to increase upstream pressure for the calibrated leak.. Will go to |100 kPa|

Wednesday, February 24, 2021, 09:26: No vacuum response.

Wednesday, February 24, 2021, 09:30: Cage locked.

Wednesday, February 24, 2021, 09:31: Auto-ramping TGHT/TBHT to 580/290 @ 4A/min

Wednesday, February 24, 2021, 09:42: BIAS/EZL/EE @ 30/13/1.5 kV, anode bias @ 200 V.

Wednesday, February 24, 2021, 11:23 :Opening cage to increase upstream pressure for the calibrated leak.. Will go to |250 kPa|

Wednesday, February 24, 2021, 11:31: Actually my two-stage regulator limits how much higher I can go. Limited to |200kPa| for and Ar leak rate of 4e-6 mbar l /s.

Wednesday, February 24, 2021, 11:33: Gas line refilled, no vacuum response.

Wednesday, February 24, 2021, 11:34: Cage locked.

Wednesday, February 24, 2021, 11:37 : BIAS/EZL/EE @ 30/13/1.5 kV, anode bias @ 200 V.

 Wednesday, February 24, 2021, 12:10: Mass scan completed.

Wednesday, February 24, 2021, 12:10: Auto-ramping TBHT to 310 A @ 2 A/min. This current should be around 1800-1850 C.

 Wednesday, February 24, 2021, 15:0: Temperature estimation says 1700 C, I wonder if the temperature is colde because of the high power target.

Wednesday, February 24, 2021, 15:02 : Argon signal is quite noticeable as roughing the gas lines drop the current down to 0 .

Wednesday, February 24, 2021, 18:55: Emittance scans have failed for both argon and m/q=28. It might be related to the very low intensity of the beam. FC0 reads ~10 nA at TBHT=310.

Change several parameters but only noise is recorded.

Wednesday, February 24, 2021, 18:57 Auto-ramping TBHT to 315 @ 1A/min

 Wednesday, February 24, 2021, 21:35: BIAS/EZL/EE/AND @ 0.000 kV:

Wednesday, February 24, 2021, 21:35: Cooling target @ 1 A/min

Thursday, February 25, 2021, 09:37: TGHT/TBHT @ 520,255 A IG1 @ 1.25e-6T. 

Thursday, February 25, 2021, 09:38: Auto-ramping TGHT/TBHT to 580/290 A @ 4 A/min 

Thursday, February 25, 2021, 09:46:  BIAS/EZL/EE @ 30/13/1.5 kV, anode bias @ 175 V.

Thursday, February 25, 2021, 14:04: Efficiency is decreasing as TBHT current increases. This seems to be correlated to the apparent reduction in estimated temperature coming from the anode current readback.

This could indicate that the increase in TBHT current heats up the TGHT-TBHT system but given this is a HP target, maybe the heat is dissipated through the target.

On previous tests both at the isac test stand and the evaporator 2, I have seen the effect of tght current in cathode temperature.

I will lower the TGHT current and I will keep increasing the TBHT current to see what happens.

Thursday, February 25, 2021, 22:46: Several attemps for efficiency measurements as a function of temperature. Partially sucessful

Thursday, February 25, 2021, 22:47: TGHT/TBTH @ 450/290.

 Thursday, February 25, 2021, 22:48: BIAS/EZL/EE/AND @ 0.000 kV:

Friday, February 26, 2021, 08:55: IG1 @ 1.07e-6 T.

Friday, February 26, 2021, 09:00:  BIAS/EZL/EE @ 30/13/1.5 kV, anode bias @ 175 V.

Friday, February 26, 2021, 17:20: All day running efficiency measurements as a function cathode input current.

With the colder target I estimated a maximum cathode temperature of 1820 coming from TBHT current=330 A.

Despite this being an estimated temperature from the anode drain current, the fact that the maximum total source beam current is only some tens of  nA, indicate very few electrons.

I finally managed tom take emittance measurements, so far the  parameters on the emittance rig page were not compatible with the tune I am using.

Friday, February 26, 2021, 19:26: Mass scan left running at this high temperature. 

MAss scan run at different coils

Friday, February 26, 2021, 23:18: Cooling TBHT to 290 @ 2 A/min.

 Friday, February 26, 2021, 23:19: BIAS/EZL/EE/AND @ 0.000 kV:

Saturday, February 27, 2021, 18:12: TBHT voltage stable, IG1 stable. Despite putting a lot of heat, the system seems to be OK.

Most of the day I have been setting up routines for automatic sweeps. 

they work fine

Sunday, February 28, 2021, 02:48: Experimental run will finish in about 1hr.

Code will set anode=5V and coil=0A.

Lot's of parameter mapping, efficiency measurements, some emittance scans, some rpms, some mass scans

Sunday, February 28, 2021, 23:12: Increasing voltage limit on the tbht heater from 3.001 to 3.5, just in case is necessary to reach 340 A. 

bunch of mass scans run.

Monday, March 01, 2021, 05:02: BIAS/EZL/EE/AND @ 0.000 kV:

Monday, March 01, 2021, 05:0: Auto-cooling TGH/TBHT to 0 A at 2 A/min 

AS

Monday, March 01, 2021, 09:00: Coil from 90 to 0 A. Power / sources off.

Monday, March 01, 2021, 09:02: IV4 closed / reset

Monday, March 01, 2021, 09:05: IG1 & Turbo pumps off.

Monday, March 01, 2021, 09:07: Purge FS#5

Monday, March 01, 2021, 10:44: Vented

 Monday, March 01, 2021, 12:57: Roughing

Monday, March 01, 2021, 13:30: Turbos on. Started a bit late as I was distracted. They were ready at around 13:26

Monday, March 01, 2021, 13:41: IG1 on. 

 Monday, March 01, 2021, 14:08: Pumping aborted. I will install the ExTorr RGA available

Monday, March 01, 2021, 13:00 ExTorr RGA installed (e-log 859)

Monday, March 01, 2021, 16:07:Roughing 

Monday, March 01, 2021, 16:37: Turbos on. 

Monday, March 01, 2021, 16:46: IG1 on. 

Monday, March 01, 2021, 17:25: RGA on, recording trendlines 

Monday, March 01, 2021, 17:43: IG1 @ 1.1e-5 Torr

Monday, March 01, 2021, 17:43:  Waterlines open. No response on RGA nor striptool.

Monday, March 01, 2021, 18:20: Power/Optics on.

Monday, March 01, 2021, 19:02: IG1 @ 5.2e-6

Monday, March 01, 2021, 19:20: RGA shows a clear response on the opening and closing of the gas lines.

Monday, March 01, 2021, 19:53: IG1 @ 3.76e-6 T

Monday, March 01, 2021, 19:53: Auto-ramp up TGHT/TBHT to 580/290 @ 2 A/min.

Monday, March 01, 2021, 19:57: BIAS/EZL/EE @ 30/13/1.5 kV, anode bias @ 150 V, coil current @ 0 A.

Tuesday, March 02, 2021, 07:43: IG1 @ 2.96e-6T. 

Tuesday, March 02, 2021, 11:03: System tripped 

Tuesday, March 02, 2021, 11:06: Vacuum started to increase when coil was set to 80 A.

Tuesday, March 02, 2021, 11:08: IG1 started to drop as soon as the system tripped, this indicates that this was not a vacuum incursion from the gas or water but rather something related to heat.  Maybe some copper from the coil melted.

AS  checked thing were OK (see elog 860)

Tuesday, March 02, 2021, 12:35: Auto-ramp up TGHT/TBHT to 580/290 @ 4 A/min.

Tuesday, March 02, 2021, 15:25: IG1 @ 1.66e-7 T.

Tuesday, March 02, 2021, 15:26: Increasing coil current, response in vacuum. RGA increases mass 44 ( CO2).

* The coil jacket is made of fiberglass, that Si with mass 28. Hence,  the CO/N2  signal will increase if the jacket starts sublimating.

**from the future SiO with a mass of 44 will show an increase in "CO2" signal

Tuesday, March 02, 2021, 15:34: Coil @ 30 A IG1 @ 2.15e-6 T.

max IG1 = 2.25e-6T

Will remain at this current until vacuum  starts decreasing.

 Tuesday, March 02, 2021, 15:50:  BIAS/EZL/EE @ 30/13/1.5 kV, anode bias @ 150 V

Tuesday, March 02, 2021, 17:23: IG1 @ 2.15e-6 T. 

Tuesday, March 02, 2021, 17:26: Coil @ 40 A. 

Tuesday, March 02, 2021, 17:33: Coil @ 45 A 

max IG1 = 3.3e-6 T.

Tuesday, March 02, 2021, 18:39: IG1 @ 2.68e-6 

Tuesday, March 02, 2021, 18:40: Coil to 55 A. 

max IG1 = 3.87e-6 T

Tuesday, March 02, 2021, 20:07: IG1 @ 2.6e-6 T.

 Tuesday, March 02, 2021, 20:07: Coil to 60 A.

max IG1 = 3.07e-6 T

Tuesday, March 02, 2021, 21:25: IG1 @ 2.59e-6T 

Tuesday, March 02, 2021, 21:25: Coil to 70 A. 

 max IG1 = 4.1e-6 T

Tuesday, March 02, 2021, 22:31: IG1 @2.76e-6 T.

 Tuesday, March 02, 2021, 22:32: Coil @ 80 A.

 max IG1 = 4.35e-6 T

Tuesday, March 02, 2021, 23:31: IG1 @ 2.68e-6

Tuesday, March 02, 2021, 23:32 Coil @ 90 A. 

  max IG1 = 4.26e-6 T

Wednesday, March 03, 2021, 00:33: IG1 @ 2.68e-6 T.

Wednesday, March 03, 2021, 00:33: Coil to 100 A.

Voltage limited. Increasing from 1 A to 1.1 A.

  max IG1 = 3.87e-6 T

Wednesday, March 03, 2021, 01:03: IG1 @ 3.23e-6 T.

Will let sit on here until it outgasses 

  max IG1 = 3.87e-6 T

Wednesday, March 03, 2021, 07:27 : IG11.59e-6 T.

Wednesday, March 03, 2021, 07:28: Coil @ 110 A.

Voltage limited. Increasing from 1.1 A to 1.2 A.

 Wednesday summary: tght remained at 400 A. Several tbht, anode, and coil scans. Went up to 345 on the TBHT, the current on the cathode was above 250 mA for a voltage of around 300 V. I stopped there as the large electron current could melt the grid.

Thursday, March 04, 2021, 08:43: Re taking some points from yesterday 

Took several mass scans and emittance scans

Friday, March 05, 2021,

Investigated beam composition at different temperatures, I couldn't find a peak that is affected by argon injection. species with m/1 above 50 u only appear with tght>580 and tbht>295. These values are a bit tricky to work on as the FEBIAD has melted before near these values.

I will continue mass scans, emittance, and efficiency measurements.  On the last day I will push towards higher temperatures.

Saturday, March 06, 2021,

Investigating beam composition. Mass scans and the parameter sweep on the dominant peaks both with and without gases.  THBT is at 315 A.

Sunday, March 07, 2021:

Investigating  Ar++ both with and without gas.

Investigating  Ta++

Sunday, March 07, 2021, 11:15: TBHT to 320 A @ 2A/min 

Sunday, March 07, 2021, 11:45: During a parameter scan, epics cut communication with my notebook. It seems like the HLA server might be down :/ 

Sunday, March 07, 2021, 12:32: Discussed with  Spencer, he was upgrading jaya. Now things are up and running gain. 

Sunday, March 07, 2021, 13:36:  Ar+++ observed now at mass ~13.33 u, with a current of 3e-10A.

Sunday, March 07, 2021, 16:32: TBHT to 325 A @ 1A/min  

Sunday, March 07, 2021, 20:06: Emittance measurements for same efficiency parameters of anode, coil. The tail of the emittance gets larger on some combinations. 

Sunday, March 07, 2021, 20:07: TBHT to 330 A @ 1A/min  

Sunday, March 07, 2021, 20:22: After increasing the TBHT to 330 A, the anode leakage current started to drop, this hasn't happened before. The TBHT  voltage look stable so I don't think the cathode is failing ...yet 

systematic measurement of emittance: fixed anode sweeping coild, and also fixed coil sweeping anode

Monday, March 08, 2021, 01:55: Investigating 39K at very low voltages. Taking emittance measurements and RPMs. 

Monday, March 08, 2021, 02:25: Anode@ 0V Coil @ 50A. FC0 in 

Monday, March 08, 2021, 07:22:  TBHT to 335 A @ 1A/min  

Monday, March 08, 2021, 09:48: Water cooling values. The temperature on the HS are likely higher because of the high temperature we are running the ion source. The flow on TBHT seems lower compared to what was registered on elog 856

Monday, March 08, 2021, 10:44: At anode voltgae aroun 400 the system got unstable in high voltage, likely due to almost 600 mA being sink on the anode PS.

Monday, March 08, 2021, 10:45 : TBHT to 331 A @ -1A/min 

Monday, March 08, 2021, 13:38:

 08-Mar-21 16:47:54    32.463    3.517    21.183    2.701    22.075    1.61    23.494    4.918    

Tuesday, March 09, 2021: 

Investigating doubly charged species, increase tbht in steps of 1A. Anode voltage gets limited at around 300 V due to the high electron current

Tuesday, March 09, 2021, 08:30: TBHT to 340 A. 

Tuesday, March 09, 2021, 10:27: TBHT to 341 A. 

Tuesday, March 09, 2021, 11:26:  TBHT to 345 @ 1A/min 

Tuesday, March 09, 2021, 15:50:  TBHT to 350 @ 1A/min. I think above this value there will be an anode-cathode short, or the transfer line will melt.

 Tuesday, March 09, 2021, 17:1: TBHT to 360 @ 1A/min.

Tuesday, March 09, 2021, 19:26: TBHT to 370 @ 1A/min.

Tuesday, March 09, 2021, 19:32: TBHT voltage increasing but not the current. Increasing the TBHT voltage from 3.5 to 4 V. 

Tuesday, March 09, 2021, 20:17:  358 A is stable, 359 A is a bit jumpy, but 360 A is quite jumpy.

Tuesday, March 09, 2021, 20:29: CG1A reached 1 T, tapping down from 363 to 361. 

Wednesday, March 10, 2021, 00:20: It has been quite challenging to reach 370 A on the TBHT, the highest current reached is 368 A. At this current, it seems that an efficiency flattening has definitely started.

Wednesday, March 10, 2021, 00:21: Bringing TBHT to 325 A @ 2A/min

After a spark and during the last bit of the scan, it seems the anode shorted. The source is dead :/

 Wednesday, March 10, 2021, 02:43: Auto-cooling TGHT/TBHT to 0 A  @ 2A/min

Wednesday, March 10, 2021, 02:49: IV4 closed 

Wednesday, March 10, 2021, 02:49: IV4 timed out. 

Wednesday, March 10, 2021, 02:51: Cooling aborted.

 Wednesday, March 10, 2021, 02:51:  Auto-cooling TGHT/TBHT to 0 A  @ 4A/min

Wednesday, March 10, 2021, 02:55: Biases to 0 kV. 

Wednesday, March 10, 2021, 03:1:  Cooling aborted.

Wednesday, March 10, 2021, 03:11   Auto-cooling TGHT/TBHT to 0 A  @ 10A/min

Wednesday, March 10, 2021, 03:20: Short is not present anymore. Anode can hold voltage. 

 Monday, March 01, 2021, 16:03: An ExTorr RGA has been installed in the ISAC test stand.

The original SRS 100 is still broken ( e-log 778)

The SRS 100 from the conditioning station will not be available this week.

Monday, June 07, 2021, 14:39: Roughing beam line section.

Monday, June 07, 2021, 14:46: TMS:TP6 on.

Monday, June 07, 2021, 14:49: TMS:TP2 on.

Wednesday, June 09, 2021, 10:00: FC6 wiring reconnected. 

Replacement Ta target for the previous one (44139-10) https://elog.triumf.ca/TIS/Test-Stand/880

Friday, June 25, 2021, 11:16: Roughing.

Friday, June 25, 2021, 11:55: TP1B started.

Friday, June 25, 2021, 12:00: TP1B on. TP1 A started.

Friday, June 25, 2021, 12:08: IG1 on.

Friday, June 25, 2021, 12:23: Vacuum @ 1.06E-05T. Open waterline FS#5.

Friday, June 25, 2021, 12:26: Vacuum @ 9.97E-06T. OK.

Friday, June 25, 2021, 12:30: Power / sources PS on.

Friday, June 25, 2021, 12:34: Full check for remote use. IV4 open (OK)

Vacuum @ 6.70e-06T

TGHT / TBHT @ 10 / 10 A

BIAS / EE / EZL @ 1 / -0.1 / 0.5 kV.

Ready for operation.

Friday, June 25, 2021, 12:39: All back to 0 Kv / 0 A. Wait for vacuum stabilization.

Sunday, June 27, 2021, 03:55: Auto-ramping TGHT / TBHT to 500 / 150 A @ 2 A per min.

Sunday, June 27, 2021, 04:04: BIAS / EE / EZL @ 20 / -1.0 / 10 kV. 

Sunday, June 27, 2021, 09:36: Auto-ramping TGHT / TBHT to 580 / 230 A @ 2 A per min.

Sunday, June 27, 2021, 10:07: BIAS / EE / EZL @ 30 / -1.5 / 13 kV.  

Sunday, June 27, 2021, 10:16: TGHT / TBHT @ 580 / 230 A. Vacuum @ 1.25e-06T.

Sunday, June 27, 2021, 11:20: Mass & wire scans complete. Vacuum @ 1.14e-06T. Auto-cooling @ 2 A per min.

Sunday, June 27, 2021, 15:07: BIAS / EE / EZL @ 0 kV. TGHT still cooling.  

Monday, June 28, 2021, 06:17: IV4 closed (Needs reset). Sources, IG1, turbo pumps, off 

Monday, June 28, 2021, 08:22: Power off. IV4 reset. Venting.

Restarting everything after swapping RP1 (see elog 889).

Friday, July 30, 2021, 16:14: IG1 @ 7.02e-7 T.

Friday, July 30, 2021, 16:26: IV4 open. IG1 @ 6.3e-7 T.

Friday, July 30, 2021, 16:27: Auto-ramping TGHT/TBHT to 540/270 A @ 4A/min.

Friday, July 30, 2021, 16:32: Emittance meter power supply found at 500 V. Running a scan does not weep the voltage.

Cycling the PS and running a  scan. Now the voltage is swept.

Friday, July 30, 2021, 17:43: TBHT reached set current. TGHT @ 304 A and ramping up. IG1 @  6.36e-7 T. TIS glowing so I guess it didn't break from early trip.

Friday, July 30, 2021, 18:53: IG1 @ 7 e- 7 T.

Friday, July 30, 2021, 18:53 : Auto-ramping TGHT to 580A @ 4A/min.

Friday, July 30, 2021, 19:10. TGHT reached set current. IG1 @ 7.35e-7 T.

Friday, July 30, 2021, 19:22: BIAS/EZL/EE @ 30/13/1.5 kV. 

Friday, July 30, 2021, 19:25: IG1 @ 7.55e-7 T.

Friday, July 30, 2021, 19:26 :  Auto-ramping TBHT to 280A @ 4A/min.

 Friday, July 30, 2021, 19:29: TBHT reaches set current. IG1 @ 7.72e-7 T.

Friday, July 30, 2021, 21:24: Mass scans with gas on/off shows clear only contribution from gas line. 

Friday, July 30, 2021, 21:25: Anode=200C,Coil=30A. FC0=5.14e-9 A. FC6=9.35e-10 A for 40Ar+

Parameter scans performed on nominal heater current and also with heater at similar power to older measurements.

Leaving some devices that are typically at 0 V to something like 1 to 2 volts, to avoid the red 0 readback as a test.

Saturday, July 31, 2021, 08:13: System stable overnight. TMS:VCB5 was the only device found off.

Mass scans, anode-coil scans. gas line effects.

Sunday, August 01, 2021, 08:42: On-site: Grid is fine. Gas pressure stays at |200kPa| even after several line flushes. Continuing  remotely.

Several parameter scans all at 280A. All of the look remarkably similar, so reproducibility over two day is possible.  Mass scans at three different coil-anode combinations

Emittance scans still not possible @ 1.3e-9 A on FC6, when going to 290 A will try again.

Sunday, August 01, 2021, 22:52: IG1 @ 8.43e-7 T.

Sunday, August 01, 2021, 22:53:  Auto-ramping TBHT to 290A @ 4A/min.

Monday, August 02, 2021, 01:00: IG1 @ 860e-7T. FC1=1.59e-8.

Monday, August 02, 2021, 08:59: IG1 @ 7.44e-7 T.

Mass scans performed. Emittance scans are still not possible with FC6=2.2e-9 A. Parameter scans

 Monday, August 02, 2021, 09:02:  Auto-ramping TBHT to 300 A @ 4A/min.

Emittance scans are still not possible with FC6=3.1e-9 A

 Monday, August 02, 2021, 12:48: IG1 @ 7.6e-7 T.

Monday, August 02, 2021, 12:48:  Auto-ramping TBHT to 305 A @ 2A/min.

Monday, August 02, 2021, 16:40: IG1@ 8.01 e-7 T. 

 Parameter scans. Mass scans performed. Emittance scans are still not possible with FC6=6.21e-9 A. I think there is something wrong with the parameters or with the hardware. To check with Carla on Tuesday.

 I will take one more measurement at higher current and go tomorrow to check the emittance scan status.

Monday, August 02, 2021, 20:46:  Auto-ramping TBHT to 310 A @ 1A/min. IG1 @ 8.16e-7 T.

 Parameter scans. Mass scans. 

Monday, August 02, 2021, 23:47: IG1 @ 8.07e-7 T. FC0 = 3..8e-8 A.

Monday, August 02, 2021, 23:52:  Done for the day.

Tuesday, August 03, 2021, 07:34: Things were stable overnight. IG1 @ 7.92e-7 T. 

Parameter scans, and emittance meter troubleshooting.

Grid is fine.

Tuesday, August 03, 2021, 11:55: Emittance scans seem to work now( see e-log 891) 

Tuesday, August 03, 2021, 12:08: Done on-site. Continuing remotely. 

Emittance scan. Mass scans.

Tuesday, August 03, 2021, 20:21: Ramping TBHT to 315 A @ 1A/min. IG1 @ 8.2e-7 T.

Parameter scan. Mass scans. Emittances scans.

Tuesday, August 03, 2021, 22:55: IG1 @8.07e-6. Done for the day. Will continue tomorrow.

Wednesday, August 04, 2021:  Parameter scan. Mass scans. Emittances scans.

Data analysis on files generated so far. Efficiency as a function of temperature-voltage look similar.

Given that previous cathode heating current did not have emittance, I will go down to measure efficiency.

Thursday, August 05, 2021: Morning troubleshooting CANBUS signal with no luck (this is actually something good)

Mass scans. Parameter scans, and finally emittance scans at lower temperatures.

Thursday, August 05, 2021, 20:58: IG1 @ 7.35e-7 T. 

Friday, August 06, 2021: CANBUS analyzer up-and-running.

Parameter scan. Mass scans. Emittances scans.

Saturday, August 07, 2021, 06:00:  Found all my epics windows closed. Probably a network issue as I cannot connect from any of my pc's. Submitting a ticket.

 Saturday, August 07, 2021, 08:43: Reply from Steve McDonald says there are general network issues and someone is goin on-site to investigate the "network switch stack in the ISAC2 second floor"

Saturday, August 07, 2021, 10:12 : Communications restore after fix.

Saturday, August 07, 2021, 15:06: FC0 reading oscillates a lot and sometimes drop to 0. Mass scan shows almost no peaks without gas. With gas, the FC0  behaves the sames even thought 40Ar+ signal is 1e-8A and responds to the gas open/close.

Moreover, the RPM0s have an offset current. RPM0A is not showing beam.

I will turn the HV off in case there is weird dark current going on. 

Saturday, August 07, 2021, 17:29 : On-site

ISAC test stand PC lost connection to epics due to the same issue. Initiating striptools.

Nothing visible wrong on service cap nor around the ISAC test stand, however, FC0 still oscillates a lot.

I will change the signal cables to see if one controller can read from the other faraday cup.

 Things look better now (see entry 893)

Finished mass scans

Sunday, August 08, 2021, 00:35: Ramping TBHT to 300 A @ 4 A/min. IG1 @ 6.71e-7 T. 

Sunday, August 08, 2021:  Parameter scans, mass scans, emittance scans performed.

Sunday, August 08, 2021, 23:55: Checking other species given that  with TBHT=310 A I can see m=90, which I think it might be Ta++

Monday, August 09, 2021: TBHT increased to 315 A

Parameter scans, mass scans, and emittance scans performed.

Investigating the following species: O+, (H2O)+, Ar++, (N2)+/CO+, (O2)+,Ta++,(TaO)++ on masses 16,18,20,28,32,90,98, respectively.

Both the atomic, and molecular oxygen follow different tendencies wrt other species.

Tuesday, August 10, 2021, 09:57: TBHT @ 320 A. IG1 @ 6.53e-7T. 

Tuesday, August 10, 2021, 10:01: Increasing anode limit current to 200mA. All previous tests had 150 mA and the maximum current recorded was ~110mA. 

Tuesday, August 10, 2021, 11:42: Grid is fine (confirmed by Marla) 

Tuesday, August 10, 2021: Mass 60 observed, it might be (SiO2)+ coming from the coil jacket. The parameter scan shows that the ion current is only dependent on voltage. 

Wednesday, August 11, 2021. Mass scan, and parameter scan. For the first time I am measuring only FC0 with and without gas. I'm gonna investigate the higher peaks individually, likely they are H2O,O2,O,H2, and Ar

Thursday, August 12, 2021: All day measuring different ion currents with and without gas (H2,N,O,OH,H2O,N2/CO,O2).

Friday, August 13, 2021, 09:03: Currently measuring FCO with gas. 

 Friday, August 13, 2021, 10:42: On-site. Grid is fine

Friday, August 13, 2021, 19:50:Scans completed for different species, results seem consistent but required more in-depth. FC0 scans shows higher values towards high anode voltage and high coil current but not all species shows this behavior.

Friday, August 13, 2021, 19:51: Ramping tbht to 330 @ 1 A/min. 

Friday, August 13, 2021, 20:29L IG1@8.25e-7T. 

Saturday, August 14, 2021, 22:28: Parameter scans, mass scans. Some emittance scans unsuccessful.

Anode leakage current seems to creep a bit overnight. This could be an indication of a failure onset but I'll have to see. I won't increase the current remotely until being on-site

Sunday, August 15, 2021, 10:10: Anode leakage current has increased 10 mA overnight. 

Sunday, August 15, 2021, 20:43: Emittance scans for multiple anode/coil combinations. Visually there are differences on the geometrical emittance, not so much on the 90% intensity emittance. Requires proper  emittance  analysis.

Monday, August 16, 2021, 18:58: Data analysis and short summary. Systematic emittance measurements.

Request to add more PVs to control emittance and mass scans from jupyter notebook 

Tuesday, August 17, 2021, 10:22: On site. Grid is fine. Re-initianing epics as my pc reboot it.

Tuesday, August 17, 2021, 10:23: TBHT to 335A @ 1A/min. Anode leakage current =150 mA. IG1=6.51e-7T. Increase anode current limit to 250 mA.

Tuesday, August 17, 2021, 10:29: The grid is as bright as the cathode. This is the first time the grid shines this bright. 

Tuesday, August 17, 2021, 10:53: The grid looks normal at anode=200V. By making an anode sweep I was able to observe that at around 300 V there is an onset on how bright the anode get. Passing this voltage the grid start to shine and gets a maximum brightness when reaching 500V.

This seems to suggest that the power deposited on the grid is enough to cause substantial heating if it makes it as bright as the cathode. The maximum power into the anode body (at this cathode heating current (335A))  is 500V* 200mA=100W (just like a lightbulb)

Tuesday, August 17, 2021, 12:03: Done on-site. Will continue remotely. 

Tuesday, August 17, 2021, 20:19: Anode is drawing more current. During Ar+ scan, the maximum anode current registered was ~200 mA. Now is ~250 mA 

Schottky plot shows a tiny upwards kick.

Tuesday, August 17, 2021, 22:16: Once again, at the end of the scan the current increased. This time to 320 mA

Tuesday, August 17, 2021, 22:18: I think the grid will melt tonight  with anode/coil @ 200V/30A. 

Wednesday, August 18, 2021: Well, well, well. Grid didn't melt but the  anode leakage current has increased again. At some point the anode got current limited to 350 mA and from 490 V it drop to 470V.

Wednesday, August 18, 2021, 16:57: Increasing the anode limit current to 400 A.

Wednesday, August 18, 2021, 18:01: During the scan on FC0, the anode current went up to 400 mA so I increased to 500 mA, but I had to increase to 600 mA but it was still getting current limited. Scan aborted

Maybe now I am melting the grid 

I will run an FC0 scan with gas on while I'll go on-site to check the grid and the "anomalous" ionization..

Running a mass scan while I go on-site. Anode=200. Coil=90 A.

Wednesday, August 18, 2021, 19:42: Grid is melted. From the look of it half of the visible part collapsed into a blob while the other is gone (allowing to see the far backside of the target oven.

With this knowledge I can proceed with more aggressive tests in order to test the limit if the "anomalous" regime.

Wednesday, August 18, 2021, 23:24: After a mass scan with 0 V to check surfaces ionizes species I noticed there is a signal on mass ~ 137.5 which I am not sure what it is.

It might be Ba or a molecule but is coming from the transfer line as sweeping the voltage between 0 and 2 V changes the response but above this the signal is gone and reappears with 80 V.

Thursday, August 19, 2021, 08:08: mass ~137.5 disappeared. If I increased the anode voltage to 400 V or so some appears but quickly drops.

 Thursday, August 19, 2021, 11:35: Increased anode current limit to 800 mA.

Thursday, August 19, 2021, 14:08: Scan didn't cause an increased on leakage current. Maximum registered was around 200 mA. However, the contour plot looks different to the case when the grid was complete.

Thursday, August 19, 2021, 23:36: Finishing some scans at the current settings.

Thursday, August 19, 2021, 23:36: TBHT to 280A @ -1A/min. Tomorrow I will focused on temperature scans without caring much on emittance o mass composition. 

Friday, August 20, 2021, 11:28: Scans done for,280,285. Currently running 290 A.

The coil current dependence qualitatively follows the one from ISOLDE, in which a series of minimum and maxima occur and also vary a bit with voltage.

Friday, August 20, 2021, 13:34: Accidentally set TBHT to 226 A directly from 295 A. 

Friday, August 20, 2021, 13:36: Heating TBHT to 300 A @ 4A/min. 

Friday, August 20, 2021, 14:13: TBHT is at 295 A to check things are still the same. 

Friday, August 20, 2021, 23:46: TBHT @ 310 A. 

Saturday, August 21, 2021, 06:20: Scan on-going for TBHT 315 A. 

Saturday, August 21, 2021, 13:25: TBHT to 335 A. 

Saturday, August 21, 2021, 15:02: TBHT to 340 A. 

Saturday, August 21, 2021, 18:11: The voltage got current limited during the scan for 345 A. When setting the voltage to 0V, the anode seems to be shorted. 

Saturday, August 21, 2021, 22:46: Ramping down TGHT/TBHT to 0 (@-1A/min) but the short is still present. Currently  @ TGHT/TBHT 454/162 A. 

Sunday, August 22, 2021, 13:29: This morning the heaters reach 0 A but the anode remain current limited. I will proceed to turn off the TS to check tomorrow morning the ion source. 

Sunday, August 22, 2021, 13:31: IV4 closed.

 Sunday, August 22, 2021, 13:36: Sources off.

Sunday, August 22, 2021, 13:38: IG1 off

 Sunday, August 22, 2021, 13:38: Turbos off.

Monday, August 23, 2021, 07:19: Venting 

Monday, August 23, 2021, 08:30: Confirmed a short between target/cathode to anode/heatshield

Monday, August 23, 2021, 11:29: Confirmed that the anode power supply still works :) 

Feedthrough R had a flange installed with a HV feedthrough on it for TM3 service tray prototype HV tests. It was replaced today with the original blank flange.

Thursday, November 04, 2021, 11:54: Venting

water loop removed

Thursday, November 04, 2021, 13:39: Roughing