Monday, October 07, 2024, 09:54: Roughing. U-Line installed on HS waterline.

Monday, October 07, 2024, 10:34: Vent Chamber. TP6 & TP2 off.

HS note:

Base# 45235-16

Lid# 39956-8

Thursday, October 03, 2024, 16:04: Roughing. IG6? Error?

Thursday, October 03, 2024, 16:24: BV1A open. 

Thursday, October 03, 2024, 16:32: TP1B on

Thursday, October 03, 2024, 16:43: TP1A on.

Thursday, October 03, 2024, 16:51: IG1 on. 

Thursday, October 03, 2024, 20:01: Water cooling on. No effect to vacuum. TGHT TBHT ramping at 1A/30s to 580A/230A

Friday, October 04, 2024, 09:13 : Slowly increasing BIAS/EE/EZL to 30/2.5/13 kV.

Friday, October 04, 2024, 09:30:   problem with TMSIG6 (low pressure sensor in beam line).  Forced on for interlocks temporarily.  

Friday, October 04, 2024, 11:14   mass scanned - FC6 background working.  filename = 2024-10-04--11-11 HP-Ta-24D - scan 3.txt 

Friday, October 04, 2024, 11:14 repeating mass scan.   filename = 2024-10-04--11-40 HP-Ta-24D - scan 4.txt

Friday, October 04, 2024, 11:53 increasing to bias 50kV / ezl 33kV. 

Friday, October 04, 2024, 12:34:  BIAS/EZL at 50/33 kV.  Leaving for HV conditioning.

Friday, October 04, 2024, 12:43   one spark from HV BIAS to ground caused TGHT to trip. Current was restored within 10s. 

Friday, October 04, 2024, 15:31:  decreasing BIAS/EZL to 30/13kV.  Throughout time at high voltage, there were 3 sparks. Two were within 5 minutes of each other, and the last 2 hours proceeded without incident (no sparks)

Friday, October 04, 2024, 15:47  BIAS EZL at 30/13 kV.  running final mass scan. background FC6 appears not to be working again. but then restored.  scan file name = 2024-10-04--16-30 HP-Ta-24D - scan 5.txt

Friday, October 04, 2024, 16:22 decreasing biases to 0V

Friday, October 04, 2024, 16:23  ramping TGHT TBHT to 0/0A at -1A/30s

 Monday, October 07, 2024, 07:58: IV4 closed. IG1 off. TP off.

Monday, October 07, 2024, 08:43: PS off. Waterlines purged. Venting. 

 https://elog.triumf.ca/TIS/Target+Production/146

Has not run through EVAP2.

Friday, September 20, 2024, 14:04: Roughing.

Friday, September 20, 2024, 14:39: TP1B on

Friday, September 20, 2024, 14:45: TP1A on. 

Friday, September 20, 2024, 14:54: TP1A at speed. IG1 on. 

Monday, September 23, 2024, 16:38   Water cooling on. no effect on vacuum pressure. Pressure at 6.0e-7T

Monday, September 23, 2024, 17:00  Ramping TGHT and TBHT to 580/230A at 1A/30s 

Tuesday, September 24, 2024, 08:58 TGHT at 502A. Ramping program preventing further ramp up do to 'good vacuum' restriction at 1e-6T as outgassing is pushing up the chamber pressure. Increased good vacuum parameter to 5e-6T, resuming ramp up to 580A at 1A/30s.

 Tuesday, September 24, 2024, 11:12:   TGHT TBHT at 580/230A. Increasing BIAS/EZL/EE to 30/13/2.5 kV slowly.

Tuesday, September 24, 2024, 14:16:   mass scan at high voltage completed - 2024-09-24--14-11 LP-Ta-24C - scan 1

Tuesday, September 24, 2024, 14:17     background signal recording problem persists, despite channel change conducted with controls team and Keiko - will continue to investigate switching to current integrators

Tuesday, September 24, 2024, 14:17  ramping up HV BIAS to 50kV for conditioning, alongside increased EZL voltage

Tuesday, September 24, 2024, 17:00  BIAS was stable at 50kV for 30min. no noticeable sparking.   

also noted that the mass scan data was saved incorrectly. however, there are multiple screen captures of the mass scan which clearly detail which peaks are present.

HV elements decreased to zero and target was left hot overnight for outgassing and so beam content can be re-evaluated

Wednesday, September 25, 2024, 10:24    increasing BIAS/EZL/EE to 30/13/2.5 kV slowly.

Wednesday, September 25, 2024, 13:25    two mass scans conducted:  2024-09-25--12-39 LP-Ta-24C - scan 2,   2024-09-25--13-22 LP-Ta-24C - scan 3

Wednesday, September 25, 2024, 13:26   ramping down high voltages. 

Tuesday, September 10, 2024, 16:21:   Target installed in test stand by Brady

Tuesday, September 10, 2024, 16:21: roughed down and turbo pumps now on.

Tuesday, September 10, 2024, 20:27   Pressure at 4.9e-6, increasing TGHT TBHT to 580A/230A at 1A/30s

Wednesday, September 11, 2024, 10:00 The TGHT TBHT parameters were mistakenly reversed during heating. TBHT was dropped to 230A and TGHT increased to 580A at 1A/30s.

Wednesday, September 11, 2024, 13:50 TGHT TBHT at 580 230.  Increasing BIAS/EE/EZL to 30/2.5/13 kV.

Wednesday, September 11, 2024, 14:36 At high voltage, on FC0 there is an output beam current of 1.85e-7 A.

Wednesday, September 11, 2024, 14:49 Mass scan recorded.   2024-09-11 HPTiC-24D - scan 1.txt ... FC6 problem with recording background level data persists

Wednesday, September 11, 2024, 15:53  increasing BIAS and EZL to condition high voltage 

Wednesday, September 11, 2024, 16:32 at 37kV (EZL 22kV), TGHT timed out and cut the current to the target. I elected to leave it cold rather than suddenly reheating it, and am cooling down TBHT at -1A/30s, while continuing to increase BIAS for conditioning.

there have been no sparks at all and I'm unsure of what precipitated this event. None of the 'trip indicators' on the TGHT panel lit up during this event. I will bring this up with Keiko/Roberto tomorrow Sept 12.

Wednesday, September 11, 2024, 17:06  one spark occurred at 49kV

 Wednesday, September 11, 2024, 17:15  now at 50kV, EZL at 33kV.  Over 30 minutes there was just one spark at the HV bias.

Wednesday, September 11, 2024, 17:50  decreasing high voltage elements to 0 0 0. 

Friday, September 06, 2024:  New TSH:TGHT power supply has been installed and is now functional. Magna-Power TSD-900/208. The TSH:TBHT power supply has also been cleaned, and the COIL power supply replaced with a duplicate that should function identically.

Monday, August 12, 2024, 17:00   EOD. target installed, roughed, turbos on. No effect on vacuum from turning on water cooling lines. TGHT TBHT slowly brought to 230A/230A overnight. 

Tuesday, August 13, 2024, 09:28.  Vacuum at 9.9e-7T.  TGHT TBHT at 210/210. accelerating heating to 230/230. bringing up HV EZL EE to 30 / 2.5 / 13   kV

Tuesday, August 13, 2024, 09:51.  with EZL 13kV, EE 2.5kV. When increasing BIAS from 17.0 to 17.5kV.  Signal becomes detectable on FC0, at 7.75e-10A

Tuesday, August 13, 2024, 10:13  at BIAS 30kV. FC0 and wire scanners appear to be working correctly. FC0 reading 2.66e-8A 

Tuesday, August 13, 2024, 10:13  turning on all beam optics for FC6 mass scan.

 Tuesday, August 13, 2024, 10:31   mass scan procedure is doing a very poor job of recording the background noise. filename  2024-08-13_10-44 Ksalt mm 230-230

Tuesday, August 13, 2024, 10:46   increasing tght to 330

Tuesday, August 13, 2024, 10:59    FC0 at 2.1e-8A

Tuesday, August 13, 2024, 11:12  running mass scan at TGHT TBHT = 330/230 A.   filename 2024-08-13_11-21 Ksalt mm 330-230

Tuesday, August 13, 2024, 11:23 increasing TGHT to 430

Tuesday, August 13, 2024, 11:29  three sparks within 2 min at TGHT 378A.  (no sparks at all previous to this). TGHT ramp aborted. 

Tuesday, August 13, 2024, 11:36  resuming TGHT increase after 6 minutes of no sparks.  

Tuesday, August 13, 2024, 11:51  FC0 reading 1.6e-8.  FC0 signal fluctuating throughout test. rises during ramp and drops during static TGHT TBHT level.

Tuesday, August 13, 2024, 11:53  running mass scan at TGHT TBHT 430/230 A .  filename 2024-08-13_12-16 Ksalt mm 430-230 

Tuesday, August 13, 2024, 12:17  increasing TGHT to 530A.  

Tuesday, August 13, 2024, 12:31  FC0 at 3.03e-8 A

Tuesday, August 13, 2024, 12:31  beginning mass scan   -  filename   2024-08-13_13-02 Ksalt mm 530-230

Tuesday, August 13, 2024, 13:02 increasing TGHT to 580A 

Tuesday, August 13, 2024, 13:13   FC0 at 3.58e-8A.  beginning mass scan - filename  2024-08-13_13-35 Ksalt mm 580-230

Tuesday, August 13, 2024, 13:37    increasing bias to test sparking

Tuesday, August 13, 2024, 13:58   at 37kV, a number of optics elements prior to FC0 went down. no voltage or current spikes

Tuesday, August 13, 2024, 13:59  at 42.4kV, a couple sparks, seem to involve TGHT and BIAS. these dropped a few optics elements. when I brought them back up, they went down again, at a time with no voltage or current spikes.

Tuesday, August 13, 2024, 14:30 at 43.6kV, the sparking frequency became regular, with HV bias sparks occurring approximately every 5 minutes

Tuesday, August 13, 2024, 17:00 considerable time was spent until end of day manipulating the bias and the TGHT current level in an effort to discover the location of the regular sparking

increases in HV were found to increase the frequency of sparking, and eventually the HV increase was found to hit a threshold where the current would increase noticeably, with a stable voltage. this was accompanied by a buzzing coming from the feedthroughs on top of the cage. seemed to be coming from the TGHT(+) feedthrough. At no time did there appear to be sparking within the chamber of the test stand. In one instance, with HV just below the threshold of buzzing, increasing TGHT seemed to induce the buzzing state.

Wednesday, August 14, 2024, 11:16  ramping up bias to HV. intending to push HV today to find the source of these sparks and buzzing. initially, will be observing this with TGHT TBHT at 180/180 A

Wednesday, August 14, 2024, 11:47 at BIAS = 32.6kV (with EE 2.5 kV and EZL 13 kV), HV appears to be stable. Yesterday, we observed a fluctuating BIAS current which seemed to culminate in regular sparking activity (although this was at voltages of >40kV)

 Wednesday, August 14, 2024, 12:26 at bias = 38.8kV, there was a significant accompanying increase in BIAS current, but no evidence of sparking or buzzing

 Wednesday, August 14, 2024, 12:46  at BIAS = 49.2kV, the buzzing begins.  On the strip tool this is also seen as a large jump in current, with stable voltage

Wednesday, August 14, 2024, 12:49  dropping the bias by ~1kV stopped the buzzing. ramping up quickly again caused a spark and more buzzing.  increasing the voltage to attempt to locate the source.

Wednesday, August 14, 2024, 13:18   at bias of 49.2kV, buzzing began. dropping the bias stopped it. to attempt to locate the source, we increased the bias significantly. At 53kV, the bias power supply began to current limit. when this was increased, a spark caused the putty connection at the test stand to disconnect and two turbo pumps to trip off. once restored, another increase of the bias eventually caused a large spark when trying to locate the buzzing sound. Again, it seems to be at the feedthroughs of TGHT TBHT. My guess is TGHT+, but there is nothing visual to confirm it is coming from there. This buzzing state is also accompanied by a drop in EZL current to 0 and a large increase in EZL voltage readback.

 Wednesday, August 14, 2024, 15:05 dropped the HV and removed the cage to investigate any issues. we propose that this likely involves jumping to the einzel lens and are curious if raising the EZL voltage significantly would prevent this state from recurring. cage back on, raising HV

Resuming testing after TGHT TBHT power supply updates:

Friday, September 06, 2024, 12:09:   Ramped up TGHT and TBHT to ~170A at 1A/30s.  Increasing ramp rate to 1.7A/10s up to 580A/230A

 Friday, September 06, 2024, 14:11  slowly increasing BIAS, EE and EZL to 30kV, 2.5kV, 13kV

Friday, September 06, 2024, 15:53  appears that FC0 and wire scanners are working normally. However, there is a threshold reading problem with FC6. seems that a negative readout is present on FC6 if there is no substantial signal, and then nothing is recorded to the mass scans.

Friday, September 06, 2024, 15:54  increasing voltage to test high voltage sparking (BIAS AND EZL)

Friday, September 06, 2024, 16:23  after resetting the FC6 polarity and the FC6 bias, the background signal began showing up.

Tuesday, September 10, 2024, 12:19  Test stand vented, target removed.

Friday, August 09, 2024, 21:07 Insulators, retainer and Re foil have been replaced, source cup machined so the ion source does not short against it. Venting TS now.

Friday, August 09, 2024, 22:17 Roughing.

Friday, August 09, 2024, 22:35: TP1B on. - AS

Friday, August 09, 2024, 22:42: TP1A on. - AS.

Friday, August 09, 2024, 22:50: Both TP at speed. 2.65e-05T Vacuum. FS#5 open.

Friday, August 09, 2024, 22:52: PS on. - AS.

AS:

Saturday, August 10, 2024, 07:02: TGHT / TBHT @ 26 / 5 A. BIAS / EE / EZL @ 1 / -0.5 / 1 kV. TGHT tapped back down to 5 A. 

Saturday, August 10, 2024, 07:05: Auto-ramping TGHT / TBHT to 350 / 150 A @ 2 A per min.

Saturday, August 10, 2024, 07:27: Halt ramping @ 45 / 45 A. Set auto-ramping TGHT / TBHT to 500 / 230 @ 2 A per min. Optics are set.

Saturday, August 10, 2024, 09:59: BIAS / EE / EZL @ 30 / -1.5 / 13 kV. TGHT / TBHT @ 321 / 230 & still ramping. One spark on tap up.

Saturday, August 10, 2024, 10:02: Small peaks on RPM0A & RPM0B. No signal on FC0. One spark*.

Saturday, August 10, 2024, 10:07: Spark* 

Saturday, August 10, 2024, 10:11: BIAS / EE / EZL @ 1 / -0.5 / 1 kV. TGHT / TBHT @ 344 / 230 & still ramping.

Saturday, August 10, 2024, 11:35: BIAS / EE / EZL @ 30 / -1.5 / 13 kV 

Saturday, August 10, 2024, 11:38: 1 spark* 

Saturday, August 10, 2024, 11:40: TGHT / TBHT @ 500 / 230 A. FC0 & wire scans produced signals / peaks. 

Saturday, August 10, 2024, 11:45: Starting mass scan. 

Saturday, August 10, 2024, 12:17: Mass scan taken. Wire scans on Mass 27 taken. Signals noted on mass 40 & 138 approx. Also of note. One large spark. Steerers reset. Signal on TGHT current.

https://isacwserv.triumf.ca/onlylocal/isactdata/save_restore/masscorr/2024_07_26_Ta_67_thinfoil_1st_massscan.txt

Saturday, August 10, 2024, 12:21: Begin HV Check.

Saturday, August 10, 2024, 12:24: BIAS / EE / EZL @ 35 / -1.8 / 15 kV.

Saturday, August 10, 2024, 12:28: BIAS / EE / EZL @ 40 / -2.0 / 17 kV.

Saturday, August 10, 2024, 12:44: Began sparking after 40. Brought back down 

Saturday, August 10, 2024, 12:56: HV @ 0 kV. 

Saturday, August 10, 2024, 13:05: BIAS / EE / EZL @ 30 / -1.5 / 13 kV 

Saturday, August 10, 2024, 13:07: BIAS / EE / EZL @ 35 / -1.8 / 15 kV 

Saturday, August 10, 2024, 13:10: BIAS / EE / EZL @ 40 / -2.0 / 17 kV.

Saturday, August 10, 2024, 13:24: Spark* reset optics. 

Saturday, August 10, 2024, 13:44: BIAS / EE / EZL @ 30 / -1.5 / 13 kV  

Saturday, August 10, 2024, 14:03: HV to 0 kV. 

Saturday, August 10, 2024, 14:12: Begin Auto-cooling @ 2 A per min. 

Monday, August 12, 2024, 05:43: Sources Off. IV4 Closed.

Monday, August 12, 2024, 05:45: IG1 & Chamber TP off. 

Monday, August 12, 2024, 07:46: TS Computer rebooted. IV4 reset. PS off. Venting.

Due to HV sparking & possible water leaks on the previous TiC & Ta targets, checks are to be performed.

Chamber is empty. U-Line installed. All waterlines purged. FS#2, 3, 4, & 5 are closed.

Vacuum Group LD #2 - Connected to TP1B backing line

Tuesday, August 06, 2024, 15:50: Vacuum @ 3.38e-06T.

Tuesday, August 06, 2024, 15:52: No He connected. 7.0 E-09 atm-cc. LD TP pressure 1.0e-03T.

Tuesday, August 06, 2024, 16:20: No He connected. 1.1 E-08 atm-cc. LD TP pressure 1.0e-03T.

Tuesday, August 06, 2024, 16:23: Open to chamber. 1.6 E-08 atm-cc. LD TP pressure 1.0e-03T. Vacuum @ 2.97e-06T.

Tuesday, August 06, 2024, 16:26: 20 PSI. 1.6 E-08 atm-cc. LD TP pressure 1.0e-03T. Vacuum @ 2.97e-06T.

Tuesday, August 06, 2024, 16:32: FS#5 Charged with 20 PSI He. 1.6 E-08 atm-cc. LD TP pressure 1.0e-03T. Vacuum @ 2.75e-06T.

Tuesday, August 06, 2024, 16:34: Close FS#5

Tuesday, August 06, 2024, 16:35: FS#4 Charged with 20 PSI He. Increase to 2.5 E-08 atm-cc. LD TP pressure 1.0e-03T. Vacuum @ 2.75e-06T.

Tuesday, August 06, 2024, 16:42: While purging FS#4 with HPA, an increase of 8.3 E-08 atm-cc was observed. Vacuum @ 2.75e-06T.

Tuesday, August 06, 2024, 16:50: Re-connected He. FS#3 Charged with 20 PSI He. Increase to from 3.6 to 9.0 E-08 atm-cc. LD TP pressure 1.0e-03T. Vacuum @ 2.59e-06T.

Tuesday, August 06, 2024, 16:52: 5.1 E-08 atm-cc. LD TP pressure 1.0e-03T. Vacuum @ 2.57e-06T. Line still @ 20 PSI.

Tuesday, August 06, 2024, 16:53: Release pressure on FS#3. 5.1 E-08 atm-cc. LD TP pressure 1.0e-03T. Vacuum @ 2.57e-06T. Line still @ 20 PSI.

Tuesday, August 06, 2024, 16:55: FS#2 Charged with 20 PSI He. Steady @ 5.1 E-08 atm-cc. LD TP pressure 1.0e-03T. Vacuum @ 2.59e-06T.

Observed increases on FS#3 & FS4.

Tuesday, August 06, 2024, 17:02: All lines purged with HPA. Allow vacuum to continue down.

Tuesday, August 06, 2024, 17:03: Close off LD to TP1B valve. Dropped to 1.7 E-08 atm-cc. LD TP pressure 1.0e-03T. Vacuum @ 2.48e-06T. Safe to vent LD.

Tuesday, August 06, 2024, 17:06: LD vented & disconnected.

Wednesday, August 07, 2024, 09:15: Vacuum @ 6.43e-07T. Gradually refill the waterlines. 

Wednesday, August 07, 2024, 09:20: FS#5 open. Vacuum remains steady.

Wednesday, August 07, 2024, 09:28: FS#2 open. Vacuum @ 6.38e-07T.

Wednesday, August 07, 2024, 09:30: FS#4 open. Vacuum @ 6.38e-07T. Wait 5 min.

Wednesday, August 07, 2024, 09:35: Vacuum steady @ 6.36e-07T. Occasional dip to 6.27e-07T.

Wednesday, August 07, 2024, 09:36: FS#3 open. Vacuum steady. Wait 5 min.

Wednesday, August 07, 2024, 09:41: No change to vacuum.

While the helium did get through on yesterdays tests as a minor molecular leak, the water does not appear to have an affect. Moving to an empty HV test.

Wednesday, August 07, 2024, 09:53: Vacuum 6.20e-07T.

Wednesday, August 07, 2024, 10:43: Vacuum 6.20e-07T. IG1 & TP off.   -   venting test stand for target installation

Wednesday, August 07, 2024, end of day.  mass marker target installed in test stand with side foil removed so the target is visible through the view port. vacuum roughed, then turbo pumps turned on at end of day for overnight pumping

Thursday, August 08, 2024, 09:19 - vacuum at 6.27e-7T. water cooling was switched on. no effect on vacuum. TGHT and TBHT began ramping at 1A/30s. will test high voltage at low heat and at high heat.

 Thursday, August 08, 2024, 10:04   HV at 35kV. No sparks.  TGHT TBHT at <80A throughout HV ramp and plateau

Thursday, August 08, 2024, 10:14    BIAS down.  TGHT TBHT at 100A. increasing ramp rate to 1.7A/10s. heating up to 480/230

 Thursday, August 08, 2024, 13:59  BIAS has slowly been brought to 28kV . no sparks at all, despite being over 24kV for ~50min. 

Thursday, August 08, 2024, 14:00 increasing TGHT to 580A to attempt to induce sparks. 

Thursday, August 08, 2024, 14:42   at TGHT TBHT 580 230, HV bias at 28kV (with EZL and EE at 0 and 0), no sparks at all over the ramp and over 10 minutes at this condition. 

Thursday, August 08, 2024, 14:43 ramping HV to 30kV

Thursday, August 08, 2024, 15:01  - -  no sparks at 30kV.   bringing up EZL to 13kV  (EE=0)

Thursday, August 08, 2024, 15:11   -  no sparks with EZL at 13kV.  bringing up EE to -2500V

Thursday, August 08, 2024, 15:13  - no sparks with EE at -2500kV

 Thursday, August 08, 2024, 15:22   turned on beam optics to observe beam out, but no beam currently detected on FC0, nor on the wire scanners, nor on FC6. This target commonly has a normal beam output of primarily Na and K

Thursday, August 08, 2024, 15:50  have not been able to deduce reason for lack of beam. increasing BIAS to 50kV.

Thursday, August 08, 2024, 15:51  during ramp up, at 38kV, many optics elements tripped and switched off. however, no spark was registered at the strip tool. not sure of the cause for this.

Thursday, August 08, 2024, 15:54  at 38.8kV, a small spark, only registered on BIAS:RDCUR  (no voltage drop), tripped off beam elements prior to FC0 again.

Thursday, August 08, 2024, 16:00 BIAS at 40kV. no sparks apart from those mentioned immediately above. still have not registered any beam on FC0.

 Thursday, August 08, 2024, 16:02 Vacuum pressure has raised from 6.5e-7 to 1.3e-6 T.

Thursday, August 08, 2024, 16:03  just now, there was a spike drop in pressure and optics elements have shut down again. nothing registered on BIAS, EZL, or EE.

Thursday, August 08, 2024, 16:11   a spark occurred at 43.3 kV

 Thursday, August 08, 2024, 16:23  this spark was audible at the test stand --- ie, not inside

 Thursday, August 08, 2024, 16:51  Saw no indication overall of the same HV sparking issues that we saw with the previous two targets. However, we were unable to generate beam  register any beam output on FC0, FC6, or wire scanners.  And we don't mean 'low signal'. Actually nothing at all.

Thursday, August 08, 2024, 16:54   Ramping down TGHT TBHT now

Friday, August 09, 2024, 08:05   turbo pumps off and spinning down in preparation to vent. will remove the inner foil from the target to observe if a change in shine from the target induces sparking as before. 

Friday, August 09, 2024, 08:58   turbo pumps no longer spinning. venting now.

Friday, August 09, 2024, 10:26    foil stripped off the target. there was a hole in the source for gas (febiad/mass marker). This hole is now plugged. reinstalled, roughing.

Friday, August 09, 2024, 11:59   vacuum at 1.2e-5T.  turning on water cooling lines.  no effect on vacuum.

Friday, August 09, 2024, 12:50 heating TGHT TBHT at 1A/30s

Friday, August 09, 2024, 13:47 increasing heating rate to 1.7A/10s, up to 580/230A

Friday, August 09, 2024, 14:42  TGHT TBHT at 550 230,  increasing BIAS to 30kV 

Friday, August 09, 2024, 15:03   BIAS at 30kV.  no sparks other than a single small one at 25kV. No beam detected at FC0, FC6, or wire scanners.

 Friday, August 09, 2024, 15:18 increased BIAS again. there was one spark at 35kV, then it was stable for 8 minutes with no sparks. still no signal on FC0.  This lack of signal is highly irregular, and should not be the case despite being an empty target. Will have to compare to the next target in the test stand. To attempt to correct, we have:

- manually adjusted gain

- reset bias

- flipped polarity back and forth

- confirmed FC in position

- confirmed no flagged power supply issue

- confirmed clear beam line to FC0

- confirmed upsteam optics are tuned appropriately

Friday, August 09, 2024, 15:23  cooling target and ramping down HV

 Friday, August 09, 2024, 16:06 TGHT TBHT at 0. turbo pumps off and spinning down.

Wednesday, July 31, 2024, 18:47: Roughing.

Wednesday, July 31, 2024, 19:24: TP1B on.

Wednesday, July 31, 2024, 19:30: TP1B at speed. Backing pressure CG1A @ 0.212T.

Wednesday, July 31, 2024, 19:33: TP1A Started. CG1A @ 0.164T.

Wednesday, July 31, 2024, 19:41: TP1A at speed. Whining a bit, but it's alive.

Wednesday, July 31, 2024, 19:42: IG1 on.

Thursday, August 01, 2024, 08:00: Vacuum @ 3.14e-0T. Waterline FS#5 open. Vacuum ok. CG1A @ 0.028T.

Thursday, August 01, 2024, 08:04: IV4 open.

Thursday, August 01, 2024, 08:09: Cage closed up. PS / Sources on. Note* TGHT/TBHT breakers were on. Anode was off. All "On" now.

Thursday, August 01, 2024, 08:13: Manual tap up checks. TGHT / TBHT @ 5 / 5 A. Anode @ 100 V / 15.873 mA. Coil PS acting up. Set to 7 A, displays 9.87A & fluctuates.

Thursday, August 01, 2024, 08:19: Anode to 0 V. Coil reduced to 0 A, however still reads back 4.15 A on epics. PS @ 0A.

Thursday, August 01, 2024, 08:24: Cage open. HV sources off. Coil back to 7A. Epics shows 9.82-10.11A (Blue). Fluctuates, PS direct reading @ 7A - Steady.

Thursday, August 01, 2024, 08:39: Cage closed up. HV sources back on.

Thursday, August 01, 2024, 08:40: BIAS / EE / EZL set to 1 / -0.5 / 1 kV. Anode to 100 V / 15.873 mA. Coil remains @ 7A. Epics 10.35A (Blue) Fluctuates still. PS direct reading @ 7A.

Thursday, August 01, 2024, 08:49: BIAS / EE / EZL @ 30 / -1.5 / 13 kV.

Thursday, August 01, 2024, 08:54: BIAS / EE / EZL @ 35 / -1.8 / 15 kV.

Thursday, August 01, 2024, 08:56: BIAS / EE / EZL @ 40 / -2.0 / 17 kV.

Thursday, August 01, 2024, 08:57: 1 Spark. External - Audible.

Thursday, August 01, 2024, 09:01: Anode @ 200 V / 17.094 mA. Vacuum @ 2.75e-06T.

Thursday, August 01, 2024, 09:04: Anode @ 300 V / 18.315 mA.

Thursday, August 01, 2024, 09:05: Anode @ 400 V / 19.536 mA.

Thursday, August 01, 2024, 09:05: Anode @ 500 V / 20.757 mA. Interesting, the coil epics read back (Blue) moved to 6.98 (7) A.The coil read back stability appears to have occurred in conjunction with the 8:57am spark*.

Thursday, August 01, 2024, 09:17: 20 min stable. Can assume the spark was the coil instability discharging. Coil remain stable reading @ 7A. BIAS / EE / EZL @ 40 / -2.0 / 17 kV (20 min). Anode @ 500 V / 19.536 mA. (10 min+).

Thursday, August 01, 2024, 09:29: BIAS / EE / EZL to 0 kV. Anode to 0.

Thursday, August 01, 2024, 09:36: Auto-ramping TGHT / TBHT to 350 / 150 A @ 2 @ per min.

Thursday, August 01, 2024, 09:37: Tap up coil to 10 A. Stable. Read back on all ends match up.

Thursday, August 01, 2024, 09:39: Coil @ 20 A. Stable. Hold. Vacuum @ 2.66e-06T.

Thursday, August 01, 2024, 10:05: Coil @ 30 A. Vacuum @ 2.66e-06T.

Thursday, August 01, 2024, 10:13: Coil @ 40 A. Vacuum @ 2.68e-06T.

Thursday, August 01, 2024, 10:18: Coil @ 50 A. Vacuum @ 2.66e-06T.

Thursday, August 01, 2024, 10:24: Coil @ 60 A. Vacuum @ 2.66e-06T.

Thursday, August 01, 2024, 10:27: Coil @ 70 A. Vacuum @ 2.77e-06T.

Thursday, August 01, 2024, 10:32: Coil @ 80 A. Vacuum @ 3.03e-06T. Note* Coil was cleaned prior to installation & acrylic within dissolved. Successful run on coil.

Thursday, August 01, 2024, 10:43: Coil to 0 A. However in the last 20 A, the read back & epics did not match again. Slowly discharging on epics, although the PS read back was accurate.

Thursday, August 01, 2024, 13:29 FBP:  Auto-ramping TGHT / TBHT to 580 / 290 A @ 2 A per min . IG1:3.56e-6.

Thursday, August 01, 2024, 16:00: AS - Aborted target ramping. TGHT / TBHT @ 448 / 248 A. Vacuum limited at 5.0e-06T. Allow to out gas. Continue tomorrow am.

Friday, August 02, 2024, 06:01: Auto-ramping TGHT / TBHT to 580 / 290 A @ 2 A per min. Vacuum: 1.60e-06T.

Friday, August 02, 2024, 08:28 turning on HV

Friday, August 02, 2024, 08:35 BIAS / EE / EZL @ 30 / -1.5 / 13 kV. No issues.

Friday, August 02, 2024, 08:40 Same kind of sparks as the previous thin foil Ta observed

Friday, August 02, 2024, 08:49 Bias lowered to 20kV

Friday, August 02, 2024, 10:39 HV issues could not be identified, we recorded some sparks from within the target near the multipin and TBHT. Outgassing coil and running mass scan. Source tray to be thoroughly checked after retrieving the target. 

Friday, August 02, 2024, 15:04  gradually increased COIL current to 100A over time while monitoring vacuum to ensure no heater trips. Vacuum now at 2.4e-6 T

Friday, August 02, 2024, 15:05 increasing BIAS / EE / EZL to 30 / -1.5 / 13 kV 

Friday, August 02, 2024, 15:26   now at  BIAS / EE / EZL to 30 / -1.5 / 13 kV  --- first spark at 30kV. 

Friday, August 02, 2024, 15:37   sparking occurring at 4-5min intervals. set anode to 120V, coil to 40A. finding Ar peak via scan.   Argon operated at 0.5 bar.

Friday, August 02, 2024, 15:57   Ar peak located at 95.5332A. on magnet. tested gas on / off to confirm - current at FC6 = 1.37 nA

Friday, August 02, 2024, 16:02  ran febiad coil/anode scan. 

Friday, August 02, 2024, 16:33  data at test number = 7462 can be further visualized using the shared jupyter notebook code.  data taken at anode voltage 260V was disrupted due to a spark derailing a number of optics elements in the beamline. they were soon corrected, but this data was missed.

 Friday, August 02, 2024, 16:34   -   mass scan with  180V 70A      (Argon ON) ---- doesn't seem to be recording background noise well. ie the common background recording artifact is present. records constant numbers instead of numbers in range (1e-13,5e-12). often appears in mass scan image at slants 

Friday, August 02, 2024, 17:07    -   mass scan rerun after switching off argon and pumping down the lines. however, only run from mass 49 down, as the signal above was completely blank

Friday, August 02, 2024, 17:25  ramping down bias ee and ezl

 Friday, August 02, 2024, 17:45  decreasing TGHT and TBHT to 0a at 1A/30s

 22:55 Cooldown completed to remove the voltage wires from inside the vacuum box. 

Thursday, July 25, 2024, 14:25  - competing electrical checks prior to test stand installation

 Thursday, July 25, 2024, 17:07 - after target installation test stand roughed down, turbo pumps then turned on. vacuuming overnight

 Friday, July 26, 2024, 09:01  -  water cooling turned on, while monitoring vacuum level (~1.5e-6T).  No affect on vacuum.

Friday, July 26, 2024, 09:32  -  began increasing TGHT TBHT.   increased to 230A/230A at 1A/30s

Friday, July 26, 2024, 10:22 - closed cage and increased BIAS to 30kV to ensure a lack of sparks - additional risk of sparking due to the multipin wires connected to TGHT and TBHT at the target terminals.

Friday, July 26, 2024, 11:04   -  decreased BIAS to 0V.  Then opening cage to allow access to reading voltage across TG and TB at target

Friday, July 26, 2024, 11:29  -  reached 230/230 A.  TG TB measurements taken at this point.

Friday, July 26, 2024, 12:05  -  increasing TGHT at 1A/30s to 250A

Friday, July 26, 2024, 12:13  -  TGHT at 250A for measurement

Friday, July 26, 2024, 12:29  -  increasing TGHT to 300A at 1A/30s

Friday, July 26, 2024, 12:55 - TGHT at 300A for measurement

Friday, July 26, 2024, 13:08 - TGHT increasing at 1A/30s to 350A

Friday, July 26, 2024, 13:36  TGHT at 350 A for measurement 

Friday, July 26, 2024, 13:43 TGHT increasing at 1A/30s to 400A 

Friday, July 26, 2024, 14:10   TGHT at 400A for measurement

Friday, July 26, 2024, 14:17 TGHT increasing at 1A/30s

Friday, July 26, 2024, 14:43   TGHT at 450A for measurement

Friday, July 26, 2024, 14:53  TGHT increasing at 1A/30s

Friday, July 26, 2024, 15:20   TGHT at 500A for measurement

Friday, July 26, 2024, 15:28  TGHT increasing at 1A/30s  

Friday, July 26, 2024, 19:14 FBP: we couldn't get a great mass scan with the provided tune from Dave, we might be doing something wrong. Mass scan saved and plotted here. 

Friday, July 26, 2024, 19:16 FBP: Target will be cooled down today before the weekend. 

Monday, July 29, 2024, 09:50 TGHT/TBHT ramping up to 580/230 A 1A/30s 

Monday, July 29, 2024, 15:30:  ramping up, relatively frequent sparking beginning at 24kV. Ramped down.  (also noticed that internal test wires were shaking due to high voltage bias)

Monday, July 29, 2024, 15:49 HV at 20kV waiting for stabilization

Monday, July 29, 2024, 15:58  after a five minute period of stability, beginning to increase bias in 100V increments. 

Monday, July 29, 2024, 17:35   sparking is too frequent (decided at 24kV) to warrant attempting to condition HV up to 30kV. must determine the cause of this sparking. thus cooling target overnight.  will remove internal wires and reheat.

Tuesday, July 30, 2024, 08:32 after cooling, test stand was vented, wires removed, and subsequently pumped down. 

now beginning TGHT TBHT ramp to 580 230 at 1A/30s

Tuesday, July 30, 2024, 10:02  during TGHT TBHT ramp, HV was slowly increased to 35kV to assess high voltage stability. Throughout, and at 35kV, there were no sparks seen at all.

 Tuesday, July 30, 2024, 13:50   target at 580 230. increasing bias. 

Tuesday, July 30, 2024, 14:45   at ~24kV, the bias is sparking approximately every 4 minutes. 

Tuesday, July 30, 2024, 17:28  When sparks slowed, bias was increased, but ultimately the sparking behaviour persisted. The bias was then dropped down to 0 and TGHT TBHT cooled at -1A/30s to 0A for target removal tomorrow.

Wednesday, July 24, 2024, 14:07   Changed beamline window to DUV window (window at magnet for target source viewing)

Wednesday, July 22, 2024, 11:41  - target installed

Wednesday, July 22, 2024, 13:31 - pumping down

Wednesday, July 22, 2024, 14:21 - turbo pumps on

Wednesday, July 22, 2024, 16:35 - water cooling on - no pressure increase

Tuesday, July 23, 2024, 09:42  - TGHT/TBHT ramping up to 580/230A at 1A/15s. 

 Tuesday, July 23, 2024, 09:55  increasing ramp rate to 1.4A/10s

 Tuesday, July 23, 2024, 11:17  increasing BIAS / EE / EZL to 30 / -1.5 / 13 kV.

Tuesday, July 23, 2024, 11:44    sparks more frequent than expected.   FC0 current at 1.17e-8A

Tuesday, July 23, 2024, 11:48    decreasing bias to 29.5k until spark frequency reduces

Tuesday, July 23, 2024, 13:23   once back up to 30kV, mass scan was run

Tuesday, July 23, 2024, 13:23 bias ee ezl were dropped to zero. reservoir heater was switched to 5A. the vacuum jumped up and shut down TGHT TBHT. heater turned off. TGHT TBHT restarted and reheated.

Tuesday, July 23, 2024, 13:24 reservoir heater turned to 2A while monitoring the vacuum. then to 3A as it appeared to be stable. at 4A the vacuum began slowly increasing.

Tuesday, July 23, 2024, 13:30   4A vacuum plateaus and recovering

Tuesday, July 23, 2024, 14:30 once reservoir heater is at 5A with a stable vacuum, increasing BIAS / EE / EZL to 30 / -1.5 / 13 kV

Tuesday, July 23, 2024, 14:50 running mass scan

Tuesday, July 23, 2024,  15:20 dropping BIAS / EE /  EZL to zero

Tuesday, July 23, 2024, 15:40   turning off reservoir heater

Tuesday, July 23, 2024, 15:51  increasing BIAS EE EZL to 30 -1.5 13 kV.

Tuesday, July 23, 2024, 16:05  running mass scan

Tuesday, July 23, 2024, 17:00   cooling target. TGHT TBHT to 0 at -1A/30s

Wednesday, July 24, 2024, 09:24 purged water lines and turned off TP1A and TP1B, TP6 and TP2 --- waiting for TP to slow down.  (will be venting beam line to change window)

Wednesday, June19, 2024, Spare TiC HP-SIS target installed. TiC#24C

Wednesday, June19, 2024, 15:00: Roughing

Wednesday, June19, 2024, 17:25:  TP1B started.

Wednesday, June 19, 2024, 15:30:  TP1B Green. OK.

Wednesday, June 19, 2024, 15:30 : TP1A on.

Wednesday, June 19, 2024, 15:40: Time out on TP1A

Wednesday, June 19, 2024, 15:43: Turn on BV1A & TP1A

Wednesday, June 19, 2024, 15:43 : TP1A Green. OK.

Wednesday, June 19, 2024, 15:44: IG1 turned on @ 3.92e-05 T

_________   dave neilson

 Thursday, June 20, 2024, 10:23: Water cooling valves opened. no effect on vacuum.    

Thursday, June 20, 2024, 11:19: Power on. Increasing TGHT TBHT to 440A 290A at 1A/30s

Thursday, June 20, 2024, 15:59  increasing BIAS / EE / EZL to 30 / -1.5 / 13 kV.

Thursday, June 20, 2024, 16:21   slowly increasing BIAS to test for high voltage sparking  --- sparked at 33.6kV, sparked at 34kV. 34.6kV, 37.8kV sparking infrequent (period >5min)

Thursday, June 20, 2024, 17:18  decreasing high voltages  to 0

Thursday, June 20, 2024, 17:36  decreased TGHT to 300A overnight.

Friday, June 21, 2024, 09:16 Increasing TGHT to 580A (1A/30s) for testing

 Friday, June 21, 2024, 12:28  increasing BIAS / EE / EZL to 30 / -1.5 / 13 kV.

 Friday, June 21, 2024, 16:31  decreasing BIAS / EE / EZL to 0

Tuesday, June 25, 2024, 10:05 : TP1A TP1B off. preparing to vent chamber for target replacement.

Wednesday, July 10, 2024, 12:22: Venting - AS

Wednesday, July 10, 2024, 14:57: Roughing.

Anode short repaired (Should be :) )

Thursday, May 30, 2024, 15:56: Roughing.

Thursday, May 30, 2024, 16:10: Waterline FS#5 open. Vacuum ok & roughing down.

Bypassed IG1. TGHT / TBHT @ 5 A. Ok.

Anode to 100 V. Ok.

Thursday, May 30, 2024, 16:12: TGHT / TBHT / Anode to 0. Bypass removed.

Thursday, May 30, 2024, 16:26: TP1B on.

Thursday, May 30, 2024, 16:33: TP1A on.

Thursday, May 30, 2024, 16:41: IG1 on.

Friday, May 31, 2024, 08:50: Anode to 400 V. OK. Tapped back down. Vacuum @ 5.07e-07T 

Friday, May 31, 2024, 09:12   increasing TGHT TBHT to 440 230A at 1A/30s- dn

 Friday, May 31, 2024, 10:20  at ~130A, increased heating rate to 1.4A/10s - dn

 Friday, May 31, 2024, 11:22  anode increased to 200V, TGHT TBHT at 440 230A.  increasing TBHT to 290A

Friday, May 31, 2024, 11:38  ANODE shorted to hvc at TBHT=286A

Friday, May 31, 2024, 11:39  decreased TBHT to 285A. waiting to reestablish ANODE voltage.

Friday, May 31, 2024, 11:48 decreased TBHT to 280A, waiting to reestablish ANODE voltage. 

 Friday, May 31, 2024, 12:59 decreased TBHT to 275A, waiting to reestablish ANODE voltage.  

Friday, May 31, 2024, 12:09 decreased TBHT to 270A, waiting to reestablish ANODE voltage.  ---> recovered after 2 min at 270

Friday, May 31, 2024, 14:09 decreased TGHT TBHT to 0 for target removal monday.

Monday, June 03, 2024, 09:04 TP1A TP1B off. Waiting 30min for turbo pumps to slow, prior to venting to atmosphere.

 Monday, June 03, 2024, 10:07 venting. VV1 open. - target subsequently removed for testing possible shorting fix

Friday, June 14, 2024, 16:37:  Ceramic spacer placed between the anode and plasma electrode.

Target returned to test stand. Rough vacuum on.

Monday, June 17, 2024, 09:34:  TP1A on, TP1B on.

 Monday, June 17, 2024, 16:54  increasing tght tbht to 440 230 A at 1A/30s

 Tuesday, June 18, 2024, 14:14 Increasing ANODE to 100V .    Voltage holding.  Increasing TBHT to 290A, watching anode voltage for possible temperature induced short.

 Tuesday, June 18, 2024, 14:54   ANODE shorted at TBHT = 290A.   cooling TBHT to reestablish ANODE OL.

Tuesday, June 18, 2024, 15:04 ANODE OL reestablished at TBHT = 283A

Tuesday, June 18, 2024, 15:05  Increasing TBHT again. 1A/2min

Tuesday, June 18, 2024, 15:32 ANODE shorted again when TBHT reached 290A

Tuesday, June 18, 2024, 15:32   cooling tght tbht. ANODE OL reestablished at TBHT 275A

Tuesday, June 18, 2024, 15:42 reheating to 440A 290A with ANODE at zero, to see if there is a difference compared to heating with ANODE ON/OFF

 Tuesday, June 18, 2024, 15:55  confirmed shorted when hot. cooling to zero. 1A/30s

Friday, May 17, 2024, Spare FEBIAD Development target installed

Friday, May 17, 2024, 17:00: Roughing

Friday, May 17, 2024, 17:38:  TP1B started.

Friday, May 17, 2024, 17:43 TP1B Green. OK.

Friday, May 17, 2024, 17:46 : TP1A on.

Friday, May 17, 2024, 17:54 : TP1A Green. OK.

 Tuesday, May 21, 2024, 09:47 :   TP1A and TP1B switched off. Source tray calibrated leak to be removed.

 Tuesday, May 21, 2024, 10:13 :   VV1 open for venting to atmospheric pressure.

Tuesday, May 21, 2024, 11:26 :  Source tray calibrated leak removed, target calibrated leak connected to gas line. Chamber closed, roughing valves open. Roughing down.

 Tuesday, May 21, 2024, 12:02  TP1B on

Tuesday, May 21, 2024, 12:04: TP1A on. 

 Tuesday, May 21, 2024, 15:12  gradually raising BIAS/EL/EE voltages to 50kV/25kV/2kV.

Tuesday, May 21, 2024, 15:58  increasing BIAS to 50+kV, watching for sparks.

Tuesday, May 21, 2024, 16:38: voltage stable at 55kV. after 10 minutes, of high voltage with no sparks, dropping the voltages to 0V.

Wednesday, May 22, 2024, 11:36:  increasing voltage BIAS/EL/EE to 30kV/15kV/1.5kV.

Wednesday, May 22, 2024, 11:56 gradually increasing COIL to 80A, letting vacuum recover as necessary. 

Wednesday, May 22, 2024, 13:31:  COIL to 90A, recovering vacuum.

 Wednesday, May 22, 2024, 16:58 increasing TGHT TBHT to 440A/290A at 1A/30s. reducing COIL to 0A and voltages to 0V overnight

Thursday, May 23, 2024, 11:14 :  increasing voltage BIAS/EL/EE to 30kV/13kV/1.5kV.

Thursday, May 23, 2024, 11:33:  Sensor on beam line vacuum TMSIG6 not working. reports bad vacuum, despite both TMSTP6 TMSTP2 running at full speed. Likely that vacuum is at appropriate level.

Thursday, May 23, 2024, 11:35: turning on optics and confirming correct tune.  --- cannot do this due to interlock on TP6.  investigating problem. -- switched to filament 2 on control panel

Thursday, May 23, 2024, 13:14:  after setting magnet to argon-40, running degaussing script for coil / anode optimization  - measure_id= 6220.  heat map at bottom. . optimal point at 120V 40A (local maximum)

Thursday, May 23, 2024, 13:45:  allowing vacuum to recover after scan. vacuum during scan was approximately 4e-6 T

Thursday, May 23, 2024, 13:57 running mass scan with gas on -  2024-05-23-14-25 LP FEBIAD backup leak 1.txt

Thursday, May 23, 2024, 14:29 mass scan gas off (purged) - 2024-05-23-15-03 LP FEBIAD backup leak 2.txt

Thursday, May 23, 2024, 15:04   increasing tght tbht to 490A 320A 

Thursday, May 23, 2024, 15:26:  when at TGHT TBHT = 461A/313A, the anode power supply began current limiting (shorted to hvc)

Thursday, May 23, 2024, 15:28  cooling to 460A/310A

Thursday, May 23, 2024, 15:35  cooling to 450A/300A 

 Thursday, May 23, 2024, 15:44  stopped cooling at 455A/305A as the anode became UNshorted.

Thursday, May 23, 2024, 16:19  mass scan with gas off - 2024-05-23-16-18 LP FEBIAD backup leak 3.txt

Thursday, May 23, 2024, 16:21   gas on - mass scan -  2024-05-23-16-51 LP FEBIAD backup leak 4.txt

Thursday, May 23, 2024, 16:52 :  increasing TGHT TBHT again to test anode shorting threshold:  - shorted at: 458A/308A.  then decreased to 450A/300A, did not UNshort until after a few minutes at that current.  shorted when increased to 456/306

Thursday, May 23, 2024, 17:22   decreasing voltages to 0V

 Thursday, May 23, 2024, 11:14 :  increasing voltage BIAS/EL/EE to 30kV/13kV/1.5kV.

 Tuesday, May 28, 2024, 12:59  cooling target to 0A. will remove target to attempt fix on anode short.

 Tuesday, May 28, 2024, 17:17   TGHT TBHT at 0A. TP1A and TP1B off.

 Wednesday, May 01, 2024, 12:44:  pumped down to rough vacuum, TP1B now on.

Wednesday, May 01, 2024, 12:49:  TP1A on.

Thursday, May 02, 2024, 9:10:  water cooling on. no effect on vacuum

Thursday, May 02, 2024, 10:02:  TGHT and TBHT heating to 100A/100A at 1A/30s

Thursday, May 02, 2024, 11:02:  TGHT and TBHT heating to 230A/230A at 1.4A/10s

 Thursday, May 02, 2024, 13:53:  increasing BIAS to 30kV, EE to 2500V, EZL to 13kV

 Thursday, May 02, 2024, 14:11:  increasing  TGHT  to 280A.

 Thursday, May 02, 2024, 14:18  seeing a few sparks decreasing BIAS temporarily

Thursday, May 02, 2024, 14:25 sparks continued. decreased TGHT to 260A and saw them subside. increasing bias again.

 Thursday, May 02, 2024, 14:42 conducting mass scan - 2024-05-02-15-05 mm LPSIS a.txt

 Thursday, May 02, 2024, 15:09   increased COIL to 20A. mass scan repeated.  2024-05-02-15-37 mm LPSIS b.txt

Thursday, May 02, 2024, 15:38 decreasing TGHT to 230A, COIL at 0A

Thursday, May 02, 2024, 15:43:   repeating mass scan. 2024-05-02-16-09 mm LPSIS c.txt   * no signal. very unexpected.

Thursday, May 02, 2024, 16:10:  increased COIL to 20A, repeating mass scan.  2024-05-02-16-35 mm LPSIS d.txt

Thursday, May 02, 2024, 16:35   decreasing BIAS, EE, EZL to 0V

Thursday, May 02, 2024, 16:50 increasing TGHT to 290A at 1A/30s, to be left hot overnight.

 Friday, May 03, 2024, 10:26 increasing BIAS to 30kV, EE to 2500V, EZL to 13kV

 Friday, May 03, 2024, 11:47 increasing COIL to  40A. repeating mass scan     -   2024-05-03-12-21 mm LPSIS g.txt

 Friday, May 03, 2024, 12:22  decreasing TGHT to 260A.    

 Friday, May 03, 2024, 12:32 mass scan:   - 2024-05-03-12-59 mm LPSIS g.txt     <- accidentally labeled g. cannot change

Friday, May 03, 2024, 13:01   decreased COIL to 20A.   mass scan:  2024-05-03-13-30 mm LPSIS i.txt

Friday, May 03, 2024, 13:31  decreased COIL to 0A. mass scan:   2024-05-03-13-59 mm LPSIS j.txt

 Friday, May 03, 2024, 14:01  reducing TGHT to 230A.  mass scan:  2024-05-03-14-37 mm LPSIS k.txt

Friday, May 03, 2024, 14:38   increasing coil to 20A.    mass scan:   2024-05-03-15-14 mm LPSIS l.txt

Friday, May 03, 2024, 15:15   increasing coil to 40A. mass scan:     2024-05-03-15-42 mm LPSIS m.txt

Friday, May 03, 2024, 15:43  COIL -> 0A. decreasing EE EZL BIAS to 0V.

Friday, May 03, 2024, 15:59   decreasing TGHT and TBHT to 0A at 1A/30s

FM-SW calibrated leak installed.

Friday, April 26, 2024, 13:48: Roughing.

Friday, April 26, 2024, 14:20: TP1B started.

Friday, April 26, 2024, 14:26: TP1B Green. OK.

Friday, April 26, 2024, 14:30: TP1A on.

Monday, April 29, 2024, 08:44: Vacuum @ 4.58e-07T. Waterline FS#5 open. Vacuum ok.

Monday, April 29, 2024, 08:50: Power / sources on. Tap up check. TGHT / TBHT to 5 / 5 A. BIAS / EE / EZL to 1 / -0.5 / 1 kV. Anode to 100 V. Coil to 4 A. Ok. Tap back down.

Monday, April 29, 2024, 10:44: IV4 open.

-BB:

Monday, April 29, 2024, 11:07: BIAS / EE / EZL @ 30 / -1.5 / 13 kV.

Monday, April 29, 2024, 11:12: BIAS / EE / EZL @ 40 / -1.8 -2.0 / 17 kV.

Monday, April 29, 2024, 11:19: BIAS / EE / EZL @ 43 / -2.0 / 19 kV.

Monday, April 29, 2024, 11:23: BIAS / EE / EZL @ 45 / -2.0 / 19 kV.

Monday, April 29, 2024, 11:27: BIAS / EE / EZL @ 47.5 / -2.2 / 22 kV.

Monday, April 29, 2024, 11:33: BIAS / EE / EZL @ 50 / -2.5 / 25 kV.

Monday, April 29, 2024, 12:05: 30 minutes @ 50 kV. 3 sparks at the very end. 2 inside and 1 outside.

Monday, April 29, 2024, 12:09: BIAS / EE / EZL @ 30 / -1.5 / 13 kV. Vacuum @ 4.67e-07T. Start tapping up coil.

Monday, April 29, 2024, 12:32: Coil @ 80 A. Tapped up manually at 4 A per min approx. Vacuum @ 5.2e-07T

Monday, April 29, 2024, 14:00: Vacuum @ 7.20e-07T (30-60 min depending on whether the out gassing levels or begins to decrease)

Monday, April 29, 2024, 14:02: Coil @ 0 A.

Monday, April 29, 2024, 14:05: Anode @ 100 V.

Monday, April 29, 2024, 14:07: Anode @ 200 V.

Monday, April 29, 2024, 14:09: Anode @ 500 V.

Monday, April 29, 2024, 14:11: Anode @ 0 V.

Monday, April 29, 2024, 14:33: HV @ 0 V.

Monday, April 29, 2024, 14:34: Auto-ramping TGHT / TBHT to 350 / 150 @ 2A per minute.

Tuesday, April 30, 2024, 07:18: Auto-ramping TGHT / TBHT to 580 / 290 @ 2A per minute. 

Tuesday, April 30, 2024, 13:44: Gas lines purged & refilled with Ar.

Tuesday, April 30, 2024, 13:48: optics set.

Tuesday, April 30, 2024, 13:51: BIAS / EE / EZL @ 30 / -1.5 / 13 kV.

Tuesday, April 30, 2024, 13:56: Anode @ 100 V. Coil @ 20 A

Tuesday, April 30, 2024, 13:59: Reset / Cfg MB1

Tuesday, April 30, 2024, 14:40: Initial mass & wire scans complete.

Tuesday, April 30, 2024, 15:07:  Argon gas lines purged. 

Tuesday, April 30, 2024, 15:07:  Mass scan repeated.

Tuesday, April 30, 2024, 15:42:   Gas on. Magnet set to 40.1 mass/charge. Anode & coil vs fc6 output optimization scan started. 0-90A coil and 0-400V anode.

Tuesday, April 30, 2024, 15:55:   Vacuum is noticeably rising. If it reaches 5e-6T, will terminate the scan.

Tuesday, April 30, 2024, 15:59:  rate of increase appears to be slowing and reaching a plateau.

Tuesday, April 30, 2024, 16:01:    optimization data at measure_id=6058.  image at bottom.

Tuesday, April 30, 2024, 16:03: COIL and anode set to 0. decreasing BIAS/EZL/EE to 0V

Tuesday, April 30, 2024, 16:12: decreasing TGHT TBHT at 1A/30s to 0

 Wednesday, May 01, 2024, 09:38:   TP1B and TP1A turned off, winding down

 Wednesday, May 01, 2024, 10:1: VV1 open, venting.  Water cooling off. purged lines

 Wednesday, April 24, 2024, 16:20:     Target assembly installed.

Wednesday, April 24, 2024, 16:20:  VV1 closed. Pumping down to rough vacuum 

Wednesday, April 24, 2024, 16:21:   Water cooling on. Seal on lines confirmed.

 Thursday, April 25, 2024, 09:14    TP1A and TP1B on

 Thursday, April 25, 2024, 15:45:   Vacuum seems to be stalled at 1e-5 T. Resetting turbo pumps has no noticeable effect. TP1B is emitting a soft high pitched tone / ringing. Now venting chamber to reset target assembly and water cooling seals.

 Friday, April 19, 2024, 11:32:   assembly installed in test stand.  VV1 closed, pumping down

Friday, April 19, 2024, 11:56:   TP1A and TP1B on. 

Friday, April 19, 2024, 12:34:   water cooling on. no effect on vacuum.

Friday, April 19, 2024, 12:34:  Argon gas set to 0.5 bar. No effect on vacuum.

Monday, April 22, 2024, 09:24  beginning TGHT TBHT ramp to 440A/290A at 1A/30s.    COIL increased to 80A for conditioning. vacuum monitored.

Monday, April 22, 2024, 09:47:   vacuum peaks at ~8e-7 T.

Monday, April 22, 2024, 10:49  vacuum recovered and stable at  4.2e-7 T. 

Monday, April 22, 2024, 10:49  TGHT TBHT ramp rate toward 440/290 increased to 1.4A/10s.  COIL increased to 90A for conditioning. vacuum continues to be closely monitored.

 Monday, April 22, 2024, 11:39  TGHT TBHT have reached 440/290.  Waiting for vacuum to drop to stable value. Currently at 1.12e-6 T.

 Monday, April 22, 2024, 13:10:    vacuum stable at 9.9e-7 T

Monday, April 22, 2024, 13:11   increasing bias to 30kV 

Monday, April 22, 2024, 14:30   Unintentionally, TBHT had been increased to 230 instead of 290. Increasing to 290. 

Monday, April 22, 2024, 14:40.  BIAS sparking. Decreasing bias and increasing COIL back to 90A to condition. (spark frequency approximately 1/min)

 Monday, April 22, 2024, 15:12   increasing TGHT TBHT to 490/320 for conditioning   -  monitoring vacuum and bias closely

Monday, April 22, 2024, 15:23   prior to vacuum recovering, bias sparked again. decreasing to 25kV while vacuum recovers. 

 Monday, April 22, 2024, 15:37 vacuum plateaued at 2.5e-6T

 Monday, April 22, 2024, 16:50 Vacuum significantly decreased to ~1.5e-6.  increased bias to 30kV to observe argon beam activity. looks normal. data to be collected tomorrow after vacuum down further. Sparks were still observed at 30kV although significantly less frequently. (1/5min)

 Monday, April 22, 2024, 16:52    decreasing bias to 0 V

 Tuesday, April 23, 2024, 09:24  Vacuum at 9.6e7 T.  decreasing COIL to 0, increasing bias to 30 kV

Tuesday, April 23, 2024, 09:51   BIAS at 30kV, no sparks seen. 

 Tuesday, April 23, 2024, 09:58.  Argon gas on. COIL at 40A, ANODE at 200V. Using short mass scan to find Ar-40 peak. 

Tuesday, April 23, 2024, 10:33:   ran degaussing script in anode mode - measure_id=6018

Tuesday, April 23, 2024, 10:36  COIL set to 80A, ANODE at 340V, BIAS at 29 660 V.  

Tuesday, April 23, 2024, 10:37 mass scan 

 Tuesday, April 23, 2024, 10:57 closed sv4, open sv1. to pump down argon gas lines. then closed sv5 and sv1. 

Tuesday, April 23, 2024, 10:57   mass scan

 Tuesday, April 23, 2024, 11:19   TGHT TBHT decreased to 440 290

Tuesday, April 23, 2024, 11:35  mass scan

Tuesday, April 23, 2024, 11:49    turned argon gas back on

Tuesday, April 23, 2024, 11:50    mass scan 

Tuesday, April 23, 2024, 12:13     decreasing bias to 0 V

Tuesday, April 23, 2024, 12:33   decreasing TGHT TBHT to 100A at 1.4A/10s 

 Tuesday, April 23, 2024, 13:29   decreasing TGHT TBHT to 0A at 1A/30s

 Tuesday, April 23, 2024, 14:13   increasing bias to test HV

Tuesday, April 23, 2024, 15:00   when bias was at ~50kV, epics shut down at the test stand computer. Internet disconnected. there were two sparks over ~10min at 50kV, but there was no spark at the same time as the epics shut down

Tuesday, April 23, 2024, 15:05  It appears that this also actuated BV1B and BV6, then turning off TP1B and TP6 turbo pumps.

Tuesday, April 23, 2024, 15:16:  continuing to increase HV remotely, while monitoring closely for any sparks. the HV appears to be stable. 

Tuesday, April 23, 2024, 15:20  at 54.6 kV, the bias current rapidly increased from 0.02mA to 0.135mA. There was no decrease in voltage and no accompanying spark. HV was decreased until current dropped, before increasing HV again.

Tuesday, April 23, 2024, 16:01  decreased bias to 0V. 

Tuesday, April 23, 2024, 16:01   Turbo pumps restarted. 

 Wednesday, April 24, 2024, 09:25    TP1B and TP1A off. winding down to begin venting

 Wednesday, April 24, 2024, 10:47    VV1 open. venting.