| ID |
Date |
Author |
Target/No.# |
Source |
Station |
Module |
Target Oven W.O# |
Heat Shield W.O# |
Status |
Subject |
|
864
|
Monday, March 15, 2021, 16:10 |
Carla Babcock | | | | | | | | TISA emittance meter testing with new FEBIAD source | Monday, March 15, 2021, 16:09 Target and ion source ramped to 400A/330A this afternoon
Monday, March 15, 2021, 18:53 : Tune through to final RPMs but not optimized. 5e-8 on FC0. Will turn down target and ion source values to TGHT/TBHT 350/250 until tomorrow. BIAS/EZL/COIL/ANODE all off.
Tuesday, March 16, 2021, 15:04 Mike is finished with emittance meter controls so ramping everything back up and trying to get beam through.
Thursday, March 18, 2021, 18:06 : Vacuum has been rising slowly over the past 20hrs from 9.3e-7 to 9.9e-7. Everything has been up since Tuesday. No beam through emittance meter, though beam can be found on the regular test stand emittance meter. Just discovered that both voltage plates are plugged into positive power supplies so waiting for a controls fix on that then will retry.
Friday, March 19, 2021, 17:08 : Finally success. New emittance meter shows same results as the standard test stand emittance rig. Will continue testing new controls next week |
| Attachment 1: Carla_tune_tracking.docx
|
|
863
|
Wednesday, March 10, 2021, 14:57 |
Aaron Schmidt | | HP-FEBIAD | | | | 42752-5 | In progress | Emittance meter test with FEBIAD | Wednesday, March 10, 2021, 14:54: Roughing.
Wednesday, March 10, 2021, 14:57: BV1A open.
Thursday, March 11, 2021, 09:41: TP1B on.
Thursday, March 11, 2021, 09:44: TP1A on.
Thursday, March 11, 2021, 09:52: IG1 on.
Monday, March 15, 2021, 07:50: Vacuum @ 6.91e-07T. Open waterlines.
Monday, March 15, 2021, 07:52: Vacuum ok.
Monday, March 15, 2021, 07:55: Power / sources on.
Monday, March 15, 2021, 07:56: TGHT / TBHT @ 10 A.
Monday, March 15, 2021, 07:57: BIAS / EE / EZL @ 1 / 0.5 / 1 kV. Anode @ 25 V. Coil @ 5 A.
Monday, March 15, 2021, 08:02: All sources ok. Set back to 0. Ready for remote operation. Await word from MCR on Cu DI water system.
ref: https://elog.triumf.ca/TIS/Test-Stand/864
Tuesday, March 16, 2021, 09:53: IV4 Open |
|
862
|
Wednesday, March 10, 2021, 14:28 |
Aaron Schmidt | | | | | | | In progress | RP2 swap. | Swapped RP2 out from a Varian SH-110 to a Varian PTS06001.
Wednesday, March 10, 2021, 14:20: RP2 on.
Wednesday, March 10, 2021, 14:27: Turbo pumps on |
|
861
|
Wednesday, March 10, 2021, 11:10 |
Carla Babcock | | | | | | | | Venting for installation of emittance meters | Wednesday, March 10, 2021, 10:48 : Venting beamline section only for installation of emittance meters. |
|
860
|
Tuesday, March 02, 2021, 11:42 |
Aaron Schmidt | | | | | | | | TS Tripped. |  
Tuesday, March 02, 2021, 11:40: Fully reset
TGHT / TBHT set to 20 A ok. Anode w/ 30 V. ok.
Tuesday, March 02, 2021, 11:42: 10 A on coil. Increment was at 75 A. Set back to 1 A.
Tuesday, March 02, 2021, 11:44: BIAS / EE / EZL @ 1 / 0.5 / 1 kV.
|
|
859
|
Monday, March 01, 2021, 16:13 |
Fernando Maldonado | | | | | | | Done | Temporary RGA installation | 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. |
| Attachment 1: EXTorr.PNG
|
|
|
858
|
Monday, March 01, 2021, 12:58 |
Fernando Maldonado | | LP-FEBIAD | | | | | Done | FEBIAD parameter scans v2 | 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
Wednesday, March 03, 2021, 01:05: BIAS/EZL/EE/AND @ 0.000 kV
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
| Device |
Temp
[C] |
Flow
[lpm] |
| HS + MSP |
34.83 |
3.515 |
| TBHT |
23.49 |
2.674
|
| COIL + EE |
23.80 |
1.562 |
| TGHT |
25.56 |
4.902 |
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:
| Device |
Temp
[C] |
Flow
[lpm] |
| HS + MSP |
33.571 |
3.553 |
| TBHT |
22.135 |
2.697 |
| COIL + EE |
22.86 |
1.577 |
| TGHT |
24.452 |
4.87 |
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. |
|
857
|
Monday, February 22, 2021, 18:25 |
Fernando Maldonado | | HP-FEBIAD | | | | | Done | FEBIAD parameter scans | 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 |
| Attachment 1: ESC_-_Feb_23_FEBAID_parameter_initial_checks.docx
|
| Attachment 2: ER-580-290-30kV-m28_2021-2-23.txt
|
value (Voltage offset 40.0000)
75.0000
1.0000
95.0000
29992.6740
21
21
./emit.dat
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-0.0958 -0.0955 -0.1019 -0.1007 -0.0946 -0.0974 -0.0977 -0.0967 -0.0961 -0.0964 -0.0952 -0.0983 -0.0955 -0.0958 -0.0998 -0.0949 -0.0977 -0.0980 -0.0986 -0.0970 -0.0983
-0.0964 -0.0964 -0.0964 -0.0974 -0.0937 -0.0937 -0.0967 -0.0931 -0.0995 -0.0980 -0.0964 -0.0970 -0.0958 -0.0961 -0.1001 -0.0961 -0.0949 -0.0949 -0.0974 -0.0952 -0.0955
-0.0974 -0.0961 -0.0970 -0.0955 -0.0955 -0.0937 -0.0977 -0.0922 -0.0900 -0.0958 -0.0940 -0.0958 -0.0952 -0.0967 -0.0980 -0.0967 -0.0955 -0.0952 -0.0977 -0.0974 -0.0964
-0.0958 -0.0943 -0.0986 -0.0952 -0.0967 -0.0949 -0.0952 -0.0949 -0.0943 -0.0952 -0.0961 -0.0940 -0.0943 -0.0967 -0.0961 -0.0958 -0.0970 -0.0955 -0.0952 -0.0983 -0.0955
-0.0961 -0.0949 -0.1004 -0.0940 -0.0964 -0.0986 -0.0946 -0.0949 -0.0946 -0.0946 -0.0958 -0.0961 -0.0967 -0.0983 -0.0967 -0.0946 -0.0970 -0.0964 -0.0980 -0.0949 -0.0992
-0.0955 -0.0952 -0.1007 -0.0946 -0.0934 -0.0964 -0.0974 -0.0943 -0.0995 -0.0980 -0.0952 -0.0943 -0.0943 -0.0967 -0.0977 -0.0952 -0.0961 -0.0958 -0.0967 -0.0961 -0.0964
-0.0964 -0.0995 -0.0980 -0.0970 -0.0946 -0.0928 -0.0986 -0.0943 -0.0946 -0.0977 -0.0983 -0.0995 -0.0946 -0.0977 -0.0961 -0.0940 -0.0928 -0.0961 -0.0977 -0.0943 -0.0964
-0.0946 -0.0970 -0.1001 -0.0961 -0.0912 -0.0952 -0.0949 -0.0955 -0.0952 -0.0970 -0.0952 -0.0909 -0.0958 -0.0955 -0.0961 -0.0967 -0.0952 -0.0961 -0.0961 -0.0974 -0.0970
|
|
856
|
Friday, February 19, 2021, 13:44 |
Fernando Maldonado | | | | | | | Failed | FEBIAD parameter scans | Friday, February 19, 2021, 13:28: Roughing
Friday, February 19, 2021, 13:43: Power on
Friday, February 19, 2021, 13:59: Turbos on
Friday, February 19, 2021, 14:07: IG1 on.
Friday, February 19, 2021, 15:06: Water open. No vacuum response.
Friday, February 19, 2021, 15:06: IG1 @ 3.13e-5 T.
Friday, February 19, 2021, 15:47 :
| Device |
Temp
[C] |
Flow
[lpm] |
| HS + MSP |
23.26 |
3.92 |
| TBHT |
23.09 |
6.15
|
| COIL + EE |
23.09 |
1.80 |
| TGHT |
23.02 |
5.06 |
Friday, February 19, 2021, 15:48: IG1 @ 1.65 e-5 T
Saturday, February 20, 2021, 09:19. IG1 @ 1e-6 T
Saturday, February 20, 2021, 09:20: Auto-ramping TGHT/TBHT to 300,150 A @ 2A/min
Saturday, February 20, 2021, 13:26: IG1 @ 1.78e-6 T
Saturday, February 20, 2021, 13:29: Anode @ 50 V. Coil @ 20 A.
Saturday, February 20, 2021, 13:52: Bias voltage only reaches 6 kV, the bias current seems a bit unstable, not sure now what the problem is.
Saturday, February 20, 2021, 14:58: Auto-cooling TGHT/TBHT to 0 A @ 2 A/min
Sunday, February 21, 2021, 11:24: Auto-ramping TGHT/TBHT to 580/290A @ 2A/min
Sunday, February 21, 2021, 16:39: Ramp up complete. IG1 @ 2.15e-6 T.
Will wait until vacuum is stable to try to put high voltage.
Sunday, February 21, 2021, 21:51: IG1 @ 2.06e-6 T. Unable to go above 5 kV.
Sunday, February 21, 2021, 22:00: Auto-cooling TGHT/TBHT to 0 A @ 2 A/min
Monday, February 22, 2021, 09:12: IG1@1.01e-7 T. Bias gets current limited as of 11 kV. The system does not spark so the current is leaking through somewhere.
Monday, February 22, 2021, 09:29: Grounding the TM2 F/T. No effects, same bias issues.
Monday, February 22, 2021, 11:3: the only way for this instabilities to occur is with a short between ground and HV. No such touch is occurring inside.
Monday, February 22, 2021, 11:37: Instability reacts with punching the cage, that is, shaking up the cage causes the instability to decrease.
Will re-accommodate the cage as it seemed slightly crooked, hence the motivation to punch it.
Monday, February 22, 2021, 14:00: Cage re-accommodated with the help of Aaron. Move a insulating cable that was touching a FT.
Monday, February 22, 2021, 14:30: Now sparks are visible between the coil/HS waterlines and ground waterlines (see pictures attached). I have to open the vacuum chamber.
Monday, February 22, 2021, 14:54: IG1 off. Turbos off.
Monday, February 22, 2021, 15:49: Venting
Monday, February 22, 2021, 16:43: Made clearance between HS/COIL to GND.
|
| Attachment 1: GND-COIL_spark.jpg
|
|
| Attachment 2: GND-HS_spark.jpg
|
|
|
855
|
Thursday, February 18, 2021, 16:48 |
Fernando Maldonado | | | | | | | Failed | FEBIAD parameter scans | Thursday, February 18, 2021, 15:19: Gas lines roughed and refilled. Gauge reads -50 kPa. Absolute pressure is 50 kPa.
IG1 @ 9.7 e-7 T.
Thursday, February 18, 2021, 15:27: BIAS/EZL/EE @ 30/13/1.5 kV. No sign of instabilities as before. Bias current=0.08 mA.
This also means the leak, in this clean environment is fine.
Thursday, February 18, 2021, 15:28
| Device |
Temp
[C] |
Flow
[lpm] |
| HS + MSP |
22.25 |
3.71 |
| TBHT |
22.11 |
6.16
|
| COIL + EE |
21.94 |
1.71 |
| TGHT |
22.06 |
5.02 |
Slightly drop in flow. Will check later as well.
Thursday, February 18, 2021, 15:37: BIAS/EZL/EE @ 35/13/1.5 kV.
Thursday, February 18, 2021, 15:39. Spark inside. Recover with no problem
Thursday, February 18, 2021, 16:27 : BIAS/EZL/EE @ 40/13/1.5 kV.
Thursday, February 18, 2021, 16:28: Spark
Thursday, February 18, 2021, 16:42:
| Device |
Temp
[C] |
Flow
[lpm] |
| HS + MSP |
22.16 |
3.66 |
| TBHT |
21.91 |
2.42
|
| COIL + EE |
21.91 |
1.66 |
| TGHT |
21.8 |
4.91 |
Thursday, February 18, 2021, 17:1: Logging water temperature and flow in the PC.
Thursday, February 18, 2021, 17:19: BIAS/EZL/EE @ 0.000 kV.
Thursday, February 18, 2021, 17:20: Auto-ramping TGHT/TBHT to
Thursday, February 18, 2021, 17:26: Anode is shorted. It seems that the Ta capillary is touching the HS. I have to open.
Thursday, February 18, 2021, 17:35: IG1 and turbos off.
Thursday, February 18, 2021, 18:2: Venting
Thursday, February 18, 2021, 18:42: Gauge reader at the service cap is now at -40 kPa. A 10 kPa incursion over 4 hours.
Friday, February 19, 2021, 11:04: The anode still has a short, returning all previous jumpers. Short present.
Unhooked anode cable can sustain voltage, hence the electric circuit has a short,
Friday, February 19, 2021, 11:48: Target removed. No short on anode-target. However there is no short in the service tray either, the voltage from the anode supply is held with no problem.
Friday, February 19, 2021, 12:41: Only when the tbht is bolted the power supply goes current limited.
Friday, February 19, 2021, 12:44: Source tray can hold anode voltage without drawing any current, as expected.
Friday, February 19, 2021, 12:52: Target legs to HS presents a short. When HS is removed the short is gone. Will try to find the contact point.
Friday, February 19, 2021, 12:56: Suspecting that is the gas line that goes to the back of the TGHT; is too high and touches the HS. Putting and insulator and installing the HS cover. No short.
Removing the insulator there is a short.
Will bend the gas line.
Friday, February 19, 2021, 13:08: Installed the open assembly, and the anode voltage is held in the system without drawing current, as expected.
Friday, February 19, 2021, 13:21: TIS assy re-installed, short is fixed. |
|
854
|
Thursday, February 18, 2021, 15:15 |
Fernando Maldonado | | | | | | | Done | HLA tests | 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.
|
|
853
|
Thursday, February 18, 2021, 11:03 |
Aaron Schmidt | | | | | | | Problems/Solutions | DI water pump configuration | https://elog.triumf.ca/TIS/Test-Stand/847
There was a previous DI CU-LCW pump trip as per the above elog. The CU-LCW pump was configured this morning. The water pressure is set to 80 PSI as per the MCR. Any further can overload & trip the pump.
Thursday, February 18, 2021, 10:55: Current flow rates & pressure read at the TS
| Device |
Temp
[C] |
Flow
[lpm] |
| HS + MSP |
22.30 |
3.8 |
| TBHT |
22.14 |
6.27
|
| COIL + EE |
22.08 |
1.74 |
| TGHT |
22.16 |
5.04 |
DI water pressure as per the gauge on the supply side of the FS#2-5 manifold @ 85 PSI.
Noticeable flow rate reduction based on previous target conditioning logs. Previous pressure was around 100 PSI. |
|
852
|
Thursday, February 18, 2021, 10:47 |
Aaron Schmidt | | | | | | | | Optics loss / CANBUS failure. | Thursday, February 18, 2021, 10:45: TPS:Q3 & the TSB CBC CANBUS controllers had failed yesterday, as well as a cable was incorrectly seated. This was fixed this morning.
 Before
 After.
|
|
851
|
Tuesday, February 16, 2021, 14:52 |
Fernando Maldonado | | | | | | | Problems/Solutions | Leak checking gas lines. | Vacuum side
Tuesday, February 16, 2021, 13:42: The gas lines inside have been check. The inlet of the calibrated leak was not tighten properly and hence the large leak observed. FIXED.
Tuesday, February 16, 2021, 13:42: The only leak remaining INSIDE the vacuum is the one on the FT side which for 200kPa is around 7e-6 atm cc /s. At this pressure, the undesired leak is leak rate is around 1 % of the one getting into the source.
Atmosphere side
Tuesday, February 16, 2021, 14:49: Some minor leaks in connection points around 1e-6 atm cc/s. Not much I can do without changing all connection to glands with metal gaskets.
Tuesday, February 16, 2021, 14:50: SV5 was leak check on its own, the gas goes through quite noticeable, no need to sniff with leak detector. SV1 leak checked and it works.
Tuesday, February 16, 2021, 14:52: Valves swapped, labels changed.
Tuesday, February 16, 2021, 15:17: Roughing.
Tuesday, February 16, 2021, 15:53: Turbos on.
Tuesday, February 16, 2021, 15:59: IG1 on
Tuesday, February 16, 2021, 16:29: IG1 @ 5.3e-5 and dropping. Already better than Friday/Saturday.
Tuesday, February 16, 2021, 16:53: IG1 @ 2.9e-5 T.
Wednesday, February 17, 2021, 16:53: IG1 @ 1.5e-6 T.
Wednesday, February 17, 2021, 16:53: The Neon bottle seems to be empty. The leak on the lines were not as bad to have this happened. I suspect when squeezing the bottle I rotated the gauge enough to cause a leak there.
Wednesday, February 17, 2021, 17:00: Using a full nitrogen bottle, I confirmed that rotating the two-stage regulator causes a leak.
Wednesday, February 17, 2021, 18:00: Things look OK now. Water open. No response on vacuum. Will put power.
Wednesday, February 17, 2021, 20:00: Some items were timed out. Tried to recycle the PLC now all the items are red. Check tomorrow |
|
850
|
Friday, February 12, 2021, 16:38 |
Fernando Maldonado | | | | | | | Failed | FEBIAD parameter scan - efficiency measurements - energy spread. | Friday, February 12, 2021, 16:37: FEBIAD installed with mechanical calibrated leak
Friday, February 12, 2021, 16:38: Roughing.
Gas lines opened all the way to the sour. SV4 and SV5.
Friday, February 12, 2021, 18:47: Turbos on.
Friday, February 12, 2021, 18:55: IG1 on.
Friday, February 12, 2021, 23:22: IG1 @ 1.5E-4 T. I think the line inside the vacuum chamber is leaking
Friday, February 12, 2021, 23:23: SV5 closed.
Friday, February 12, 2021, 23:24: Vacuum dropping slightly.
Friday, February 12, 2021, 23:24: SV5 opened. IG1 responds to the opening of SV5. The lines from the feedthrough to the calibrated leak need to be re-done.
Tuesday, February 16, 2021, 10:21: IG1 off. Turbos off.
Tuesday, February 16, 2021, 11:21: Venting.
Aaron closed SV4 and the vacuum drop normally. Leak through SV5 as well. |
|
849
|
Friday, February 12, 2021, 12:16 |
Fernando Maldonado | | | | | | | Problems/Solutions | Grounding collimator cable from outside | Friday, February 12, 2021, 12:13: Since the collimator is not used, Carla and I installed a BNC short outside the cage. See picture. |
| Attachment 1: 20210212_121227.jpg
|
|
|
848
|
Wednesday, February 10, 2021, 09:49 |
Aaron Schmidt | | LP-SIS | | | 44691-8 | 44378-2 / 44378-3 | Failed | Energy spread calibration with SIS | Note* target has a ring on the TGHT - Right leg. EE & PE placed. Target to HS OL - OK.
Wednesday, February 10, 2021, 09:37: Roughing.
Wednesday, February 10, 2021, 09:45: Bypass / Force applied on IG1 to test Anode.
Wednesday, February 10, 2021, 09:46: Anode @ 10 V. Ok.
Wednesday, February 10, 2021, 09:47: Anode @ 200 V. Ok. No current.
Wednesday, February 10, 2021, 09:48: Anode to 0V & off. Bypass / Force removed from IG1.
Wednesday, February 10, 2021, 10:06: TP1B on.
Wednesday, February 10, 2021, 10:46: TP1A on.
Wednesday, February 10, 2021, 13:42: Vacuum @ 9.08e-06T. open FS#5
Wednesday, February 10, 2021, 13:46: Vacuum increased to 9.70e-06T as well as the backing pressure increased. Turbo pumps off. Going to swap the assembly out completely however continue with the same LP-SIS oven.
Wednesday, February 10, 2021, 15:20: HS 44378-3 Installed w/ LP-SIS oven #44691-8. Roughing
Wednesday, February 10, 2021, 15:48: TP1B on.
Wednesday, February 10, 2021, 16:02: TP1A on.
Wednesday, February 10, 2021, 16:11: Bypass / Force applied on IG1 to test Anode. Anode @ 200 V. Ok. No current.
Wednesday, February 10, 2021, 16:13: Anode to 0V & off. Bypass / Force removed from IG1. EZL & EE check ok. IG1 on for real.
Wednesday, February 10, 2021, 16:14: Vacuum @ 6.12e-05T & Dropping.
Wednesday, February 10, 2021, 16:16: FS#5 open. Both IG1 & the backing lines are pumping down quickly.
Contacted MCR. Reminder, mechanical services still intends to service the DI water pump. Constant DI water flow is not guaranteed.
https://elog.triumf.ca/TIS/Test-Stand/847
Thursday, February 11, 2021, 00:13: : Anode to 10V. Auto-ramping TGHT/TBHT to 200/100 A @ 2 A/min
Thursday, February 11, 2021, 09:03: Auto-ramping TGHT/TBHT to 400/200 A @ 2 A/min
From: Jas Uppal <juppal@triumf.ca>Sent: February 11, 2021 9:12 AM
To: Fernando Maldonado Millan <maldonado@triumf.ca>
Subject: Re: Cu-LCW water lines status for the ISAC test stand
Hi Fernando,
There are no plans for Cu-LCW system to be switched off today. I believe they are still working on correcting the issue that caused the trip two days ago. Once it is corrected and we are ready to switch to the secondary pump, the switch over "should" be relatively invisible with possibly a slight drop in line pressure.
Jas Uppal
Thursday, February 11, 2021, 10:31: TGHT/TBHT at 400/200 A. Anode still at 10 V 
Thursday, February 11, 2021, 10:33: Auto-ramping TGHT/TBHT to 580/230 A @ 2 A/min
Thursday, February 11, 2021, 10:42: BIAS/EZL/EE @ 30/13/1.5 kV.
Thursday, February 11, 2021, 13:42: Uncapable of holding HV. Maybe the new heatshield needs more time to outgas.
Thursday, February 11, 2021, 13:44: BIAS/EZL/EE @ 0.000 kV
Friday, February 12, 2021, 10:07: In order to trouble shoot the ISAC TS, I let the sparks to continue. Initially, they occurred in the extraction electrode spark gap and were both visible and audible. However, they stop and the instabilitiy was present.
I rise the voltage again and let the spark happen for a longer period of time.
I saw how the collimator wire on the far back of the source tray was moving as if a hurricane was inside, which is very strange. I followed up the wire and I saw how it was sparking to something (see attached photo)
I say something because from the angle is difficult to say if it was going to the chamber itself or to the HS waterlines. Both scenarios are concerning
First of all the collimator is never biased and it if any case the jacket (MHV cable) is on ground ground
In case the discharge happened from wire to the chamber, then the collimator wire was charging up, it is extremely important o note that the jacketed cable goes outside the box very close to one of the turbos.
In the other scenario where the discharge was happening from the wire to the HS waterlines, that is, HV to ground, the simply creating a clearance should be enough. In this case as well is relevant to know that this jackted cable leaves the farday cage.
I will create clearance from collimator wire to HS waterlines.
Friday, February 12, 2021, 10:33: BIAS/EZL/EE @ 0.000 kV
Friday, February 12, 2021, 10:35: Auto-cooling TGHT/TBHT to 0 A @ 4A/min.
Friday, February 12, 2021, 11:05: Discharge confirmed visually to go into the HS waterlines, (HV to ground) (see second photo attached)
Friday, February 12, 2021, 11:06: Inside the blue rack, I could hear ticks that match the discharges, probably the collimator PS is there. Will check later with things off.
Friday, February 12, 2021, 13:17: Turbos off.
Friday, February 12, 2021, 14:36: Venting. |
| Attachment 1: spark_inside_chamber_roof.png
|
|
| Attachment 2: spark_inside_chamber_front_view.png
|
|
|
847
|
Tuesday, February 09, 2021, 14:02 |
Aaron Schmidt | | | | | | | Problems/Solutions | DI water loss | Tuesday, February 09, 2021, 13:43: DI water flow completely stopped.
Control room contacted. DI water loss confirmed.
Tuesday, February 09, 2021, 13:52: DI water flow returned.
Control room contacted. DI water loss due to a "seamless" pump change over for the DI water supply & mechanical services. The supply was transferred over to a new pump which overloaded and failed. They had to switch back over to the (old) pump. Mechanical services will still try to do the switch over again. Either tomorrow or the day after. Running the TS up to 580A until then is not recommended. Control room to update tomorrow morning.
Fault# 13773: Cu-LCW south SA3-03 tripped on motor overload. |
|
846
|
Monday, February 08, 2021, 09:20 |
Aaron Schmidt | | LP-SIS | | | 44139-10 | 44378-2 | Failed | Energy spread calibration with SIS. No PE | Re-salted. PE removed. EE Cleaned
Monday, February 08, 2021, 09:17: Roughing.
Monday, February 08, 2021, 09:46: TP1B on
Monday, February 08, 2021, 11:45: Vacuum @ 6.70e-06T. Open waterlines
Monday, February 08, 2021, 11:49: Vacuum spike. Turn off IG1 & turbo pumps. Will vent to swap gaskets.
Monday, February 08, 2021, 12:45: Venting.
Swap & tighten.
Monday, February 08, 2021, 13:33: Roughing
Monday, February 08, 2021, 14:01: TP1B on.
Monday, February 08, 2021, 14:18: TP1A on.
Monday, February 08, 2021, 14:22: Opened waterline. Vacuum was in the e-05T range and dropping however it slowed and a spike was noted on CG1A & CG1B. Turbo pumps off to vent. Will inspect the seal face.
Monday, February 08, 2021, 15:08: Venting.
Monday, February 08, 2021, 15:57: Swapped out gaskets. Checked gasket faces & Re-installed HS. Roughing.
Monday, February 08, 2021, 16:44: TP1B on.
Monday, February 08, 2021, 16:51: TP1A on.
Monday, February 08, 2021, 16:58: IG1 on
Monday, February 08, 2021, 17:00: Opened waterlines. Backing pressure ok, Vacuum continuing to improve@ 7.90e-05T.
Monday, February 08, 2021, 17:03: Power/sources on. vacuum @ 5.19e-05T
FM
Tuesday, February 09, 2021, 00:46: IG1 @ 2.14e-6T. Auto-ramping to 580/230 @ 2A/min
Tuesday, February 09, 2021, 07:17. Anode got current limited again when TBHT/TGHGT were @ 215/215 A.
AS
Tuesday, February 09, 2021, 08:32: BIAS / EE / EZL @ 20 / -1.5 / 10 kV
Tuesday, February 09, 2021, 09:02: BIAS / EE / EZL @ 30 / -2.0 / 13 kV
Tuesday, February 09, 2021, 09:16: BIAS remains @ 30 kV. Adjusting Optics, EE, & EZL to tune. Minimal beam on FC0 noted.
Tuesday, February 09, 2021, 10:02: HV off. Check Anode & down stream.
Tuesday, February 09, 2021, 10:36: Auto-cooling @ 4 A per min
Tuesday, February 09, 2021, 10:40: Aborted. TGHT / TBHT back to 580 / 230 A. A few more checks.
Tuesday, February 09, 2021, 10:58: Auto-cooling @ 4 A per min
Tuesday, February 09, 2021, 11:08: HV off.
Tuesday, February 09, 2021, 13:41: Power / sources off. FS#5 closed off. Turbo pumps off.
FM.
After inspecting the ion source, and revising the electrical connections, I suspect that the TBHT was floating all the time and only when it was in contact with the plasma electrode it held HV.
When the plasma electrode was removed, there was no reference whatsoever, and the ions were not extracted.
It seems then that the resistor R4 (ISK4562D) is necessary to provide a reference to the TBHT in a similar way R1 provides one to extraction electrode.
Tuesday, February 09, 2021, 20:52: Installing R4. If the anode works this time, it will be worth checking why this reference is necessary. From the electric diagram, the chassis ground should be HV ground.
|
| Attachment 1: ESC_-_Feb_8_Start.docx
|
|
845
|
Thursday, February 04, 2021, 19:22 |
Fernando Maldonado | | LP-SIS | | | 44139-10 | 44378-2 | Done | Energy spread calibration with SIS | 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. |
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