Anode remade with a ceramic "elbow-cube". Empty target oven in use for testing.

Wednesday, April 26, 2023, 08:44: BV1B open. Roughing.

Wednesday, April 26, 2023, 08:46: BV1A open

Wednesday, April 26, 2023, 09:15: TP1B on.

Wednesday, April 26, 2023, 09:21: TP1A on.

Wednesday, April 26, 2023, 09:31: IG1 on.

Wednesday, April 26, 2023, 10:43: Vacuum @ 2.33e-06T.

Wednesday, April 26, 2023, 10:51: Waterline FS#5 opened. Vacuum stable.

Wednesday, April 26, 2023, 11:00: Gases set. IV4 opened. (Timed out repeatedly. Reset w/ screwdriver)

Wednesday, April 26, 2023, 11:16: System ready check - OK. Manually set.

TGHT / TBHT @ 5 / 5 A

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

Anode @ 100 V - 7.326mA

Coil @ 10 A.

Wednesday, April 26, 2023, 11:19: Optics set after reset.

Wednesday, April 26, 2023, 11:57: System tapped back down. Hold off for better vacuum. Vacuum @ 1.26e-06T. 

Thursday, April 27, 2023, 07:21: Vacuum @ 3.57e-07T

Thursday, April 27, 2023, 07:32: Tapped up coil to 70 A @ 7 A per min. Hold. Vacuum @ 3.68e-07T.

Thursday, April 27, 2023, 07:42: Vacuum @ 4.96e-07T. Tap down coil @ 7 A per min.

Thursday, April 27, 2023, 07:55: Auto-ramp TGHT / TBHT to 200 / 150 A @ 2 A per min.

Thursday, April 27, 2023, 09:47: TGHT / TBHT @ 200 / 150 A.

Thursday, April 27, 2023, 10:00: Tap up Anode in steps @ 20 v per 20 seconds.

Anode @ 100 V = 4.884 mA

Anode @ 200 V = 7.326 mA

Anode @ 300 V = 10.989 mA

Anode @ 400 V = 13.431 mA

Thursday, April 27, 2023, 10:12: BIAS / EE / EZL @ 10 / -1.0 / 5 kV.

Thursday, April 27, 2023, 10:21: Auto-ramp TGHT / TBHT to 400 / 200 A @ 2 A per min.

Thursday, April 27, 2023, 11:43: Anode tapped down to 100 V -  8.547mA. Some instability noted.

Thursday, April 27, 2023, 12:17: Auto-ramp TGHT / TBHT to 580 / 290 A @ 2 A per min.

Thursday, April 27, 2023, 12:18: Anode to 20 V.

Thursday, April 27, 2023, 14:09: Tap up Anode in steps @ 20 v per 20 seconds.

Anode @ 100 V = 9.768

Anode @ 200 V = 13.431 mA

Anode @ 300 V = 15.873 mA

Anode @ 400 V = 18.315 mA

Thursday, April 27, 2023, 14:19: BIAS / EE / EZL @ 30 / -1.5 / 13 kV.

Thursday, April 27, 2023, 14:50: Mass & wire scans complete.

Thursday, April 27, 2023, 21:52 : Anode sat at 400V for ~8hrs. One spark early on when HV sparked, otherwise stable drawing ~18mA. Ramped anode to zero and BIAS/EL down to 10/5 for the night (Carla).

Friday, April 28, 2023, 07:01: Auto-cooling TGHT / TBHT @ 2 A per minute.  

Friday, April 28, 2023, 13:05: HV to 0. SV5 closed.  

Monday, May 01, 2023, 07:34: Power / Sources off. IG1 off. TP1A & TP1B off.

New TiC LP-FEBIAD Target installed.

Monday, May 01, 2023, 14:23: Roughing.

Monday, May 01, 2023, 21:42: TP1B on 

Monday, May 01, 2023, 21:49: TP1A on. 

Monday, May 01, 2023, 21:57: IG1 on. 

Tuesday, May 02, 2023, 08:39: Vacuum @ 1.16e-06T. Waterline FS#5 opened.

Tuesday, May 02, 2023, 08:48: Power / sources on. Source gas set. SV5 remains open.

Tuesday, May 02, 2023, 09:00: Optics set.

Tuesday, May 02, 2023, 09:13: System ready check - OK. Manually set.

TGHT / TBHT @ 5 / 5 A

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

Anode @ 100 V - 10.989 mA

Coil @ 10 A.

Tuesday, May 02, 2023, 10:12: Coil @ 70 A. Tapped up manually @ 7 A per minute.  

Tuesday, May 02, 2023, 12:20:

Tap up Anode in steps @ 20 v per 20 seconds.

Anode @ 100 V = 10.989 mA

Anode @ 200 V = 12.210 mA

Anode @ 300 V = 12.210 mA

Anode @ 400 V = 13.431 mA 

Tuesday, May 02, 2023, 12:36: Anode @ 20 V. 

Tuesday, May 02, 2023, 12:53: BIAS / EE / EZL @ 10 / -0.5 / 5 kV

Wednesday, May 03, 2023, 04:30: Auto-ramping TGHT / TBHT to 550 / 280 A @ 1 A per minute. 

Wednesday, May 03, 2023, 10:42: BIAS / EE / EZL @ 30 / -1.5 / 13 kV.

TGHT / TBHT @ 360 / 280 A. Ramping ongoing. 

Wednesday, May 03, 2023, 14:04: TGHT / TBHT @ 550 / 280 A

Wednesday, May 03, 2023, 14:10: Anode tapped up to 100 V @ 20 V per 20 seconds.

Wednesday, May 03, 2023, 14:25: Large spark*. Reset Optics.  

Wednesday, May 03, 2023, 14:46: Mass & wire scans complete. 

Wednesday, May 03, 2023, 17:05: Anode & coil checks complete. Auto-cooling of TGHT / TBHT @ 1 / 2 A per minute.

Wednesday, May 03, 2023, 22:51: IV4 closed. 

Thursday, May 04, 2023, 07:35: SV5 closed. Sources / Power off.

Thursday, May 04, 2023, 07:37: IG1 off. TP off.

Thursday, May 04, 2023, 09:17: Venting.

NOTE:

TBHT Power Supply is 600A. EPICS thinks it is 500. Multiply current setting with 1.2 for actual current to the tube.

Friday, March 28, 2014, 10:38: Stopped turbos. Vacuum at 1.3E-7 T 

Friday, March 28, 2014, 15:05: Venting

By RM

Friday, March 28, 2014, 15:22: Target assembly installed

Friday, March 28, 2014, 15:43: Chamber Roughing started

Friday, March 28, 2014, 15:58: Turbos started

Friday, March 28, 2014, 16:03: TP1B at speed

Friday, March 28, 2014, 16:06: TP1A at speed

Friday, March 28, 2014, 16:07: IG1 Turned on - reading 1.29e-05T

 By R.M.

Monday, March 31, 2014, 09:55: Water to heatshield line turned on, no change in vacuum: 1.31e-07 T

Started March 31, 2014:

- did the HV conditioning up to 30kV.

April 1, 2014:

- started the Heaters Conditioning. 

Heaters Conditioning finished.

The Power Supplies front panel:

TGHT: 5.56V and 580A

TBHT: 2.23V and 227A

April 2, 2014:

- did a mass scan. NOTE: data is shifted by 10-15%.

plotdump-local-clean.txt_Apr2_14_16-33-19.txt

After the scan finished I found the Test Stand EPICS screens whited-out. Decided with Friedhelm to leave it as it was for the night and to contact Controls next day to reboot it without tripping the heaters and the HV.

April 3, 2014:

Found everything recovered. Except: “SOURCES ARCH IS RUNNING” was red. So, I restarted it. Jane Richards and Friedhelm didn’t do any IOC reboot. Also found that the data from yesterday’s scan was saved (see the previous scan).

Did another mass scan:  plotdump-local-clean.txt_Apr3_14_10-18-13.txt

NOTE: data is shifted by 10-15%.

Cooling down .

HV and Heaters Conditioning had finished. The target was cooled down and it's ready for the on-line installation.

Friday, April 04, 2014, 08:23: Target bias, EE and EZL to zero. Turbos off.

Friday, April 04, 2014, 10:14: Venting 

Friday, April 04, 2014, 10:48: Target removed - By R.M.

Thursday, October 25, 2012, 13:00: Roughing

Thursday, October 25, 2012, 13:19 : Turbos on

Thursday, October 25, 2012, 13:28 : Turbos at speed

Thursday, October 25, 2012, 13:29 : Vacuum at 1.6E-5 T

Anders Mjos wrote:

Thursday, October 25, 2012, 13:00: Roughing Thursday, October 25, 2012, 13:19 : Turbos on Thursday, October 25, 2012, 13:28 : Turbos at speed Thursday, October 25, 2012, 13:29 : Vacuum at 1.6E-5 T

 Friday, October 26, 2012, 08:29: Opened water. Vacuum stable at 1.8E-7 T

Did the HV conditioning for the TiC#3 up to 30kV.

Heaters ramp up in progress.

The TSH:TGHT stopped at 263.7A, but the setpoint is still ramping (now at 421A). The voltage is set correctly: have 6.238V setpoint and 4.386V readback. The reading on the Power Supply shows 418A. Through the window the target assembly looks at high temperature. The readback on Epics seems stuck. E-Fault for Controls 6389

Target looks OK. The right leg was a bit much out of center and will be adjusted in the lab.

The torque required to loosen the bolts were measured (from left to right):

Target legs: 48 and 30 in lbs

Tube htr: 25, 30 and 25 in lbs

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

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. 

Thursday, September 25, 2014, 15:44: Roughing

Thursday, September 25, 2014, 16:06: Starting turbos

Thursday, September 25, 2014, 16:14: Turbos at speed.

Thursday, September 25, 2014, 16:28: Vacuum at 1.9E-5 T

Vacuum was coming down slowly yesterday. Vented this morning to clean o-ring on door.

Friday, September 26, 2014, 08:40: Roughing

Friday, September 26, 2014, 09:02: Starting turbos

Friday, September 26, 2014, 09:10: Turbos at speed

Friday, September 26, 2014, 09:12: Vacuum at 9.7E-6 T

Monday, September 29, 2014, 08:40: Water opened for HS circuit. Vacuum stable at 1.8E-7 T

Monday, September 29, 2014, 13:51: Opened and closed IV4

Wednesday, October 01, 2014, 13:13 : Target cooled down.

Monday, October 06, 2014, 09:10: Turbos stopped. Vacuum at 1.3E-7 T

Monday, October 06, 2014, 10:49: Venting

Tuesday, October 07, 2014, 09:31: Heat Shield removed

Prepared the Test Stand for Controls to investigate E-Fault#6389.

Evgeniy increased the current limit on the power supply TSH:TGHT from 2 rotations to 7 rotations, after talking to Ray Dube.

I turned on the HV at 30kV and started the Auto-ramping.

Evgeniy and Kazuya investigated the problem with TSH:TGHT readbacks and they came to the conclusion that the PS is faulty, and the PLC reads correctly the signal sent by the PS.  Kazuya is redirecting the E-Fault from Controls to PS.

Ray Dube estimated few weeks (4-6) to send the PS offsite for repairs. This needs to be scheduled. For the time being, one can use the Test Stand with the PS setpoints, displayed on its front panel, as a reference.

Wednesday, September 14, 2011, 15:33

blah blah blah...

Wednesday, September 30, 2015, 16:28: Roughing

Wednesday, September 30, 2015, 17:01: Turbos started

Wednesday, September 30, 2015, 17:09 : Turbos at speed. Vacuum at 3.4E-5 T

Thursday, October 01, 2015, 08:51: Opened HS water. No response on RGA. Vacuum stable at 7.2E-7 T

Thursday, October 01, 2015, 08:53: Atutoramping started to 580 / 230 A

Thursday, October 01, 2015, 09:49: Changed polarity on T3

Tuesday, October 06, 2015, 08:03: Turbos stopped

Tuesday, October 06, 2015, 09:54: Venting

Thursday, September 17, 2015, 14:04: Roughing

Thursday, September 17, 2015, 14:59: Turbos started

Friday, September 18, 2015, 08:56: Opened HS water . Vacuum stable at 3.3E-7 T. No response on RGA

Friday, September 18, 2015, 09:11: Starting heating

Monday, September 21, 2015, 07:49: Starting heating to 100 / 50 A

Switched/corrected T/C polarity for T2 and T3

Monday, September 21, 2015, 08:47: Continue heating to 580 / 200 A

Monday, September 21, 2015, 13:08: Continue heating TBHT to 230 A

Monday, September 21, 2015, 15:48: Starting cool down

Monday, September 21, 2015, 16:14: RGA off

Tuesday, September 29, 2015, 16:30: Turbos stopped

Wednesday, September 30, 2015, 13:07 : Venting

The HP-SIS uses the older center block. No serial number found. 

Loaded with Tantalum. Rough Target description:

Comment on the bag - 0.9 cm space

Total Ta foils = 525

Foil Thickness = 0.025mm (assumed)

Target density =  ?

Target length = 7.3 cm

Total Mass =  ?

Total mass w/ Target oven=  1242 g.

Assembly voltage checks - OK. Note* Spacers between insulator & Target.

Thermocouple wires attach to the 9-pin connector.

 Wednesday, June 26, 2019, 14:47: roughing.

Wednesday, June 26, 2019, 15:30: Turbos on.

Wednesday, June 26, 2019, 15:51: IG1 on. Vacuum @ 1.14e-4 T.

Thursday, June 27, 2019, 07:11: Waterlines opened. No response on RGA. Vacuum stable @ 3.49e-06T.

Thursday, June 27, 2019, 07:14: Power / sources switched on. Omega switched on to read thermocouples.

Thermocouple readings:

T1 - 24.8 C & T2 - 24.9 C.

Thursday, June 27, 2019, 07:16:

Thursday, June 27, 2019, 12:43: Auto-ramping TGHT / TBHT to 350 / 125 A @ 2 A per min

Friday, June 28, 2019, 07:02: HV on, IV4 opened.

Friday, June 28, 2019, 07:09: BIAS / EE / EZL @ 30 / -1.5 / 13 kV.

Friday, June 28, 2019, 07:10: Auto-ramping TGHT / TBHT to 580 / 230 A @ 2 A per min.

Friday, June 28, 2019, 07:12: Spark*

Friday, June 28, 2019, 07:15: Optics on. Some instability noticed on the BIAS.

Friday, June 28, 2019, 07:17:

Thermocouple readings:

T1 - 106.7 C & T2 - 106.8 C.

Friday, June 28, 2019, 07:24: Halt auto ramping. TGHT / TBHT @ 375 / 150 A. BIAS / EE / EZL @ 0 kV. Unusual amount of sparks and instability. 

Friday, June 28, 2019, 08:45: BIAS / EE / EZL @ 30 / -1.5 / 13 kV. Sparks seen immediately.

The TBHT insulator on the source tray side is glowing blue. Very neat.

Sparks observed striking inside the vacuum on the thermocouples / heat shield from the TBHT.

Friday, June 28, 2019, 08:57: BIAS / EE / EZL @ 0 kV. Auto-cooling @ 4 A per  min.

Friday, June 28, 2019, 10:45: Disconnect mini pump, connect OMEGA thermometer to ground.

Friday, June 28, 2019, 10:59: BIAS / EE / EZL @ 30 / -1.5 / 13 kV. No sparks.

Friday, June 28, 2019, 11:03: manually bump up TGHT / TBHT to 50 A.

Friday, June 28, 2019, 11:05: Auto-ramping TGHT / TBHT to 250 / 150 A @ 4 A per min.

Friday, June 28, 2019, 11:39: Spark*

Friday, June 28, 2019, 11:57: Auto-ramping TGHT / TBHT to 500 / 200 A @ 4 A per min.

Friday, June 28, 2019, 12:15: TGHT / TBHT @ 322 / 200 A. Sparking*

Friday, June 28, 2019, 12:17: Halt auto-ramping. Sparking*. Manually bring down current.

Friday, June 28, 2019, 12:23: Sparks ceased. TGHT / TBHT @ 300 / 150 A

Friday, June 28, 2019, 12:24: BIAS / EE / EZL @ 0 kV. Auto-cooling @ 4 A per  min.

Friday, June 28, 2019, 12:32: new video taken. After reviewing the video, the spark originates at the heat shield / thermocouples and moves to the TBHT insulator.

Friday, June 28, 2019, 15:26: Auto-ramping TGHT / TBHT to 200/ 100A @ 4 A per min.

Tuesday, July 02, 2019, 07:58: RGA restarted.

Tuesday, July 02, 2019, 08:07: BIAS / EE / EZL @ 30 / -1.5 / 13 kV. No sparks. Vacuum @ 7.08e-07T.

Tuesday, July 02, 2019, 08:08: Auto-ramping TGHT / TBHT to 350 / 150 A @ 4 A per min.

Tuesday, July 02, 2019, 08:37: Halt auto ramp. TGHT / TBHT @ 310 / 150 A. Two sparks*. Vacuum @ 2.32e-06T. Allow to stabilize.

Tuesday, July 02, 2019, 08:55: Auto-ramping TGHT to 350 A @ 4 A per min. Vacuum @ 1.08e-06T.

Tuesday, July 02, 2019, 09:05: TGHT @ 350 A. Vacuum @ 1.08e-06T

Tuesday, July 02, 2019, 09:07: Spark*

Tuesday, July 02, 2019, 09:16: Spark*

Tuesday, July 02, 2019, 09:24: Spark*

Tuesday, July 02, 2019, 09:38: Auto-cooling @ 4 A per  min.

Tuesday, July 02, 2019, 09:45: BIAS / EE / EZL @ 0 kV.

Tuesday, July 02, 2019, 11:39: IG1 off. Turbos off. RGA off