TM4 source tray left in test stand over weekend, just the rouging pumps on. Ready to be removed Monday morning.

Monday, June 10, 2019, 06:35: Venting - Aaron S.

SEE ELOG 724

Tuesday, May 28, 2019, 15:02: Roughing

Tuesday, May 28, 2019, 15:32: Turbos on.

Wednesday, May 29, 2019, 07:08: RGA on.

Wednesday, May 29, 2019, 07:10: Waterlines opened on FS#5. No response on RGA. Vacuum ok @ 1.32e-06T.

Power on.

Wednesday, May 29, 2019, 07:13: Mini-pump & manual valve opened. Prep / rough gas lines.

Alternate SV1, SV3, & SV4.

Wednesday, May 29, 2019, 07:27: Shut off mini-pump, manual valve, & SV1. Open / close SV5, SV3, & SV4.

Wednesday, May 29, 2019, 07:32: Gas lines fully opened.

Wednesday, May 29, 2019, 07:37: Sources on.

Wednesday, May 29, 2019, 07:39: Anode to 50 V. No response on EE. EE to -100 V. Current response normal @ 34.188 uA.

Wednesday, May 29, 2019, 07:52: BIAS / EE / EZL @ 30 / -1.5 / 13 kV. Anode to 100 V. Coil to 10 A. Small sparks heard around 23 kV.

Wednesday, May 29, 2019, 07:54: IV4 opened.

Wednesday, May 29, 2019, 07:57: Auto ramping TGHT / TBHT to 350 / 150 A @ 2A per min. Vac limit increased to 3.000e-06T for out gassing.

Wednesday, May 29, 2019, 07:57: Spark* Computer screens flickered. RGA knocked out.

Wednesday, May 29, 2019, 08:00: Shut off & unplug the RGA.

Wednesday, May 29, 2019, 08:04: Optics set.

Wednesday, May 29, 2019, 08:23: Small spark* Nothing affected.

Wednesday, May 29, 2019, 08:35: Small spark* TSG:CBC restarted. 

Wednesday, May 29, 2019, 10:26: Small spark* TSG:CBC boosted from 500 V to 2501 V. Reset to 500 V. TPS:Q1 boosted from 790 / 675 V to 1500 / 1230 V. Reset.

Wednesday, May 29, 2019, 12:04: Auto ramping TGHT / TBHT to 580 / 270 A @ 2A per min. Over 100 minutes spark free.

Wednesday, May 29, 2019, 12:14: Spark* Reset optics & TSG:CBC

Wednesday, May 29, 2019, 12:35: Note*: Gradual climb on EZL current noticed as ramping current climbs.  

Wednesday, May 29, 2019, 13:01: Spark* Reset optics & TSG:CBC 

Wednesday, May 29, 2019, 13:50: Spark* Reset optics & TSG:CBC. TSG:CBC was boosted from 500 V to 2501 V.

Wednesday, May 29, 2019, 13:54:  A small but notable out gassing event, without an audible spark occurred. Brief instability in BIAS voltage & current. Vacuum spike to over 3.0e-06T.

Wednesday, May 29, 2019, 14:01: Auto ramping TBHT to 290 A @ 2A per min. TGHT at 577 (580.4 A)

Wednesday, May 29, 2019, 14:15: Wire Scans taken. TMS:RPM0A (X Axis) revealed no beam / peak. TMS:RPM0B (Y Axis) revealed a beam peak. Will attempt to steer TMS:RPM0A (X Axis) until beam peak is revealed.

Wednesday, May 29, 2019, 14:49: Further tuning required. Optics (TPS) Q1, Q2, Q3, Q4 all adjusted. FEBIAD source side (TSG) CB1, VCB1, & CBC all adjusted. Small peak found on RPM0A (X Axis). TMS:RPM0B (Y Axis) revealed a beam peak

Mass scans have not been successful. Yet.

Wednesday, May 29, 2019, 15:00: BIAS / EE / EZL brought to 0 kV. Allow out gassing of the source tray & protect equipment overnight.

Thursday, May 30, 2019, 07:43: BIAS / EE / EZL @ 30 / -1.5 / 13 kV

Thursday, May 30, 2019, 07:55: Spark* Reset optics & TSG:CBC.

Thursday, May 30, 2019, 08:37: Spark* Tripped TMS:TP6 turbo pump. Closed IV4. Tripped & Boosted  TPS:Q1. Reset optics & TSG:CBC. Open IV4.

Thursday, May 30, 2019, 09:00: Spark* Visible inside TS on the back of the optics tray off one of the EZL wires. EZL current spiked 1440 uA. Voltage dropped and became unresponsive over 8.5 kV.

Thursday, May 30, 2019, 09:13: BIAS / EE / EZL brought to 0 kV. Anode to 0 V. Coil to 0 A.

EZL to 7000V - Current spikes to over 500 uA.

Thursday, May 30, 2019, 09:32: Auto-cooling @ 2 A per min.

Thursday, May 30, 2019, 09:41: Auto-cooling @ 3 A per min.

Thursday, May 30, 2019, 09:49: IV4 closed. Gas lines closed. All sources expect TGHT / TBHT off.

Thursday, May 30, 2019, 12:24: Halt auto-cooling. Sources on.

Thursday, May 30, 2019, 12:32: BIAS @ 20 kV.

Thursday, May 30, 2019, 12:34: BIAS @ 30 kV.

Thursday, May 30, 2019, 12:38: BIAS / EE @ 30 / -1.5 kV

Thursday, May 30, 2019, 12:42: BIAS / EE @ 39.5 / -2 kV. Two sparks* Shut off turbos

Thursday, May 30, 2019, 12:45: Turbo pumps TP6 & TP1B restarted. Optics reset.

Thursday, May 30, 2019, 12:51: BIAS / EE / EZL  @ 40 / -2 / 5.25 kV.  Spark* Shut off turbos / reset.

Thursday, May 30, 2019, 12:56: BIAS / EE / EZL  @ 41.5 / -2.5 / 7.5 kV.  Spark* Shut off turbos / Optics. Reset.

Thursday, May 30, 2019, 13:01: BIAS / EE / EZL  @ 45 / -2.5 / 7.5 kV.  Visible spark inside the vacuum* Shut off turbos / Optics. Reset.

Thursday, May 30, 2019, 13:26: BIAS / EE / EZL  @ 46.25 / -2.5 / 7.5 kV.  Visible spark inside the vacuum, off multi-pin corner? * Shut off turbos / Optics. Reset. FC0 affected. Reset.

Thursday, May 30, 2019, 13:38: Go pro setup

Thursday, May 30, 2019, 13:41: BIAS / EE / EZL  @ 48 / -2.5 / 7.5 kV.  Visible spark inside the vacuum, Did the go pro catch it? * Shut off turbos / Optics. Reset. FC0 affected. Reset.

*Spark seen by Carla on the back of multi-pin (Anode wire perhaps?).

Thursday, May 30, 2019, 13:52: BIAS / EE / EZL  @ 48.9 / -2.5 / 7.5 kV.  Visible spark inside the vacuum, Did the go pro catch it? * Shut off turbos / Optics. Reset. FC0 affected. Reset.

*Spark seen on the base of the EZL.

Thursday, May 30, 2019, 14:00: BIAS / EE / EZL  @ 50 / -2.5 / 7.5 kV.

Thursday, May 30, 2019, 14:07: Spark* No trips

Thursday, May 30, 2019, 14:15: BIAS / EE / EZL  @ 50 / -2.5 / 7.5 kV.  * Shut off turbos / Optics. Reset. FC0 affected. Reset.

Thursday, May 30, 2019, 14:24 BIAS / EE / EZL  @ 51.3 / -2.5 / 7.5 kV.  * Shut off TP6 / Optics. Reset. RPM6B affected, ran up & down on its own. Reset.

Thursday, May 30, 2019, 14:25: BIAS back to 50 kV.

Thursday, May 30, 2019, 14:31: BIAS / EE / EZL  @ 51.9 / -2.5 / 7.5 kV.  Visible spark inside the vacuum, from source tray to the rear ground electrode plate * Shut off turbos / Optics. Reset. FC0 affected. Reset.

IG6 ion gauge & TMS TP6 tripped. Fix. Switched to filament 2.

Thursday, May 30, 2019, 14:43: BIAS / EE / EZL  @ 52.8 / -2.5 / 7.5 kV.  Visible spark inside the vacuum, Bottom corner of multi-pin bracket * Shut off turbos / Optics. Reset. FC0 affected. Reset. RPM6B Reset.

Thursday, May 30, 2019, 14:54: BIAS / EE / EZL  @ 53.5 / -2.5 / 7.5 kV. Sparks*

Thursday, May 30, 2019, 14:59: BIAS / EE / EZL @ 54 / -2.5 / 7.5 kV.  Visible spark inside the vacuum, Source tray EE over insulators to ground (Matt got a video, really nice)* Shut off turbos / Optics. Reset. FC0 affected. Reset. RPM6B Reset.

Thursday, May 30, 2019, 15:06: BIAS / EE / EZL @ 54.7 / -2.5 / 7.5 kV. Spark. Reset a bunch.

Thursday, May 30, 2019, 15:15: BIAS @ 55 kV.

Thursday, May 30, 2019, 15:24: BIAS / EE / EZL @ 0 kV.

Thursday, May 30, 2019, 15:24: Auto ramping TGHT / TBHT to 580 / 290 A @ 2A per min.

 Friday, May 31, 2019, 07:22: BIAS @ 10 kV. IV4 opened.

Friday, May 31, 2019, 07:33: BIAS / EE / EZL  @ 30 / -1.5 / 7.5 kV. Anode @ 200 V. Coil @ 20 A. FC0? No response.

Friday, May 31, 2019, 07:48: Coil @ 50 A. FC0 BIAS off. Troubleshoot FC0.

Friday, May 31, 2019, 08:01: Nothing on wire scans. FC0 randomly gaining, but no BIAS response. Rod N contacted on FC0.

Friday, May 31, 2019, 09:56: FC0 Fixed by Rod. N. MB1 acting up. Fixed itself through power / Canbus cycling?. Wire scans: RPM0A (X) non-responsive, RPM0B (Y) responds. Turn down HV to prep for gases.

Friday, May 31, 2019, 10:14: BIAS / EE / EZL / Anode @ 0 kV.

Friday, May 31, 2019, 10:18: Mini pump on. Manual valve opened. Prep / rough gas lines.

Alternate SV1, SV3, & SV4.

Friday, May 31, 2019, 10:31: Shut off mini-pump, manual valve, & SV1. Open / close SV5, SV3, & SV4.

Friday, May 31, 2019, 10:36: Gas lines fully opened.

Friday, May 31, 2019, 10:48: Vacuum stable @ 1.25e-06T. HV sources back on.

Friday, May 31, 2019, 11:04: BIAS / EE / EZL  @ 30 / -1.5 / 8.25 kV. Anode @ 200 V. Coil @ 50 A.

Friday, May 31, 2019, 11:32: Spark knocked out Optics & Steering. Wire scanners to zero. Unable to pick up wire scan for X or Y.

Friday, May 31, 2019, 11:35: BIAS / EE / EZL  @ 30 / -2.0 / 7.5 kV.

Friday, May 31, 2019, 12:05: Tuning adjusted. RPM0A (X) no response. RPM0B (Y) Response (It's back!!!).

Friday, May 31, 2019, 12:13: But it sparked...* Reset Optics. Re-scan to recover. Wire scanners to zero. Unable to pick up wire scan for X.

Carla, Fernando, Matt K.

Friday, May 31, 2019, 12:33  Using Brad's tuning values we see a nice peak at the first set of wire scanners on the y axis but nothing on the x axis. Using CB2, went from 200V to 900V in steps of 100V and saw nothing on the x axis. This seems to indicate x axis scanner is broken. Proceeding without x axis readout. Also tried with CB1 steerers, same effect.

Friday, May 31, 2019, 13:30: Auto-ramping TBHT to 305 A @ 2 A per min.

Friday, May 31, 2019, 13:31: EZL @ 8 kV.

Friday, May 31, 2019, 13:36: Coil to 0 A.

Friday, May 31, 2019, 15:32: Successful wire scans across RPM0A & RPM0B (X,Y) and  RPM6B & RPM6A (Y,X).

Friday, May 31, 2019, 16:27 : Wire scanners after the magnet look ok, but not enough beam to do a good emittance scan. Raised the tube heater to 310 A set point, got about 0.5nA at FC6. Probably could be solved with tuning, to be done Monday. Turning everything off but leaving target heating on. See pasted screenshots for current tune on mass 28.

Monday, June 03, 2019, 07:35: BIAS / EE / EZL @ 30 / -1.5 / 7 kV. Anode @ 200 V. Coil @ 10 A.

Monday, June 03, 2019, 07:38: Coil @ 30 A.

Monday, June 03, 2019, 07:41: IV4 opened.

Monday, June 03, 2019, 07:48: BIAS / EE / EZL @ 0 kV. A named Hossein Rafighi with IT began poking around the HV rack and running cable w/ permission reference to Dale Nagra. Locked it out. No work permit was issued. Main Control Room Contacted.

Monday, June 03, 2019, 08:03: Cable run complete. Lock off. Sources on again.

Monday, June 03, 2019, 08:23: BIAS / EE / EZL @ 30 / -1.5 / 7 kV. Anode @ 200 V. Coil @ 30 A.

Monday, June 03, 2019, 08:35: BIAS / EE / EZL @ 40 / -2 / 8 kV

Monday, June 03, 2019, 08:40: Spark* Optics tripped. Turbo pump TP6 tripped. Close / re-open IV4. Reset.

Monday, June 03, 2019, 08:41: BIAS @ 45 kV.

Monday, June 03, 2019, 08:45: Spark* Optics tripped. Turbo pump TP6 tripped. Close / re-open IV4. Reset. Mass Magnet MB1 left off.

Monday, June 03, 2019, 08:55: Spark* Optics tripped. Turbo pump TP6 tripped. Close / re-open IV4. Reset.

Monday, June 03, 2019, 08:58: BIAS / EE / EZL @ 50 / -2 / 8 kV.

Monday, June 03, 2019, 09:07 : Spark* Optics tripped. Turbo pump TP6 tripped. Close / re-open IV4. Reset.

Monday, June 03, 2019, 09:21: 2 Sparks* Optics tripped. Turbo pump TP6 tripped. Close / re-open IV4. Reset.

Monday, June 03, 2019, 09:29: Spark* Optics tripped. Turbo pump TP6 tripped. Close / re-open IV4. Reset. BIAS @ 54 kV.

Monday, June 03, 2019, 09:31: BIAS / EE / EZL @ 55 / -2.5 / 8 kV.

Monday, June 03, 2019, 09:35: Spark* Optics tripped. Turbo pump TP6 tripped. Close / re-open IV4. Reset

Monday, June 03, 2019, 09:44: Spark* Optics tripped. Turbo pumps  TP6 & TP1A Tripped. Close / re-open IV4. Reset

Monday, June 03, 2019, 09:49: Near BIAS 57.5 kV. Multiple sparks. BIAS unable to hold. Optics tripped, wire scanners & FC0 began running independently. Turbo pumps tripped.

Monday, June 03, 2019, 09:51: BIAS down to 50 kV. Burnt plastic smell lingering. Wait*

Monday, June 03, 2019, 09:57: Spark* Reset Optics. Turn off Optics for now.

Monday, June 03, 2019, 10:19: Spark* Reset Optics & Wire scanners. Anode current dropped from 10.989 mA to 7.768 mA

Monday, June 03, 2019, 10:36: BIAS Near 55 kV, brought back down to 50 kV. Multiple sparks. Optics tripped, wire scanners & FC0 began running independently. Anode current dropped from 7.328 mA to 6.105 mA. Knocked out the TGHT

The target heater dropped from 580A to 3.1 A. Attempted reset. Non-responsive.

Monday, June 03, 2019, 10:46: TGHT Still non-responsive. Bump down HV to open the cage & cycle the PS.

Monday, June 03, 2019, 11:02: BIAS / EE / EZL / Anode @ 0 kV.

Monday, June 03, 2019, 11:36: TGHT PS determined to have failed. Run w/ TBHT and test up to 50 kV.

Monday, June 03, 2019, 11:41: Sources on.

Monday, June 03, 2019, 13:17: BIAS / EE / EZL @ 30 / -1.5 / 7.5 kV. Anode @ 200 V.

Monday, June 03, 2019, 13:24: BIAS / EE / EZL @ 40 / -2.0 / 7.5 kV.

Monday, June 03, 2019, 13:37: BIAS / EE / EZL @ 50 / -2.5 / 7.5 kV.

Monday, June 03, 2019, 13:49: Odd sound from Turbo pump TP6?

Vacuum @ 1.13e-06T. Was in the 5e-07 range earlier. Strip tool revealing gradual increase.

Monday, June 03, 2019, 13:52: Spark* Optics tripped, wire scanners & FC0 running independently. Reset

Monday, June 03, 2019, 14:13: Spark* Optics tripped. Loud, outside vacuum chamber.

Monday, June 03, 2019, 14:55: BIAS / EE / EZL @ 0 kV. Anode to 0 V.

Tuesday, June 04, 2019, 08:40: BIAS / EE / EZL @ 30 / -1.5 / 7.5 kV. Anode @ 200 V.

Tuesday, June 04, 2019, 08:54: BIAS / EE / EZL @ 40 / -2.0 / 7.5 kV.

Tuesday, June 04, 2019, 09:09: BIAS / EE / EZL @ 45 / -2.5 / 7.5 kV.

Tuesday, June 04, 2019, 09:23: BIAS / EE / EZL @ 50 / -2.5 / 7.5 kV.

Tuesday, June 04, 2019, 10:21: Spark* Optics & Turbo pump TP6 tripped. Restarted. Quiet spark* Inside Vacuum chamber.

Tuesday, June 04, 2019, 10:23: BIAS / EE / EZL @ 50 / -2.5 / 7.5 kV. Almost 1 hour of no sparks.

Tuesday, June 04, 2019, 10:29: Note* Minute fluctuations of Anode current have ended after the spark. Also slight 'Burnt' smell noticed around the test stand area.

Tuesday, June 04, 2019, 10:32: BIAS / EE / EZL @ 51 / -2.5 / 7.5 kV.

Tuesday, June 04, 2019, 10:39: BIAS / EE / EZL @ 52.5 / -2.7 / 7.5 kV.

Tuesday, June 04, 2019, 11:02: BIAS / EE / EZL @ 53.5 / -2.8 / 7.5 kV.

Tuesday, June 04, 2019, 11:07: Spark* Outside TS. IG6 tripped /  reset. BIAS current spike. EZL current dropped afterwards near 460 uA from 550 uA.

Tuesday, June 04, 2019, 11:22: BIAS / EE / EZL @ 54.5 / -2.9 / 7.5 kV.

Tuesday, June 04, 2019, 11:27: BIAS / EE / EZL @ 55 / -3.0 / 7.5 kV.

Tuesday, June 04, 2019, 11:35: Spark* Optics & Turbo pump - TP6 tripped. Restarted. Quiet spark* Inside Vacuum chamber.

Tuesday, June 04, 2019, 11:39: Spark* Optics tripped. Loud*, outside the vacuum chamber, above TS. EZL current jumped back up to 550 uA

BIAS current gradually increasing. from 50 uA to 55 uA since 11:35 spark.

Tuesday, June 04, 2019, 12:01: Runaway sparks* Turbo pumps & ion gauges tripped. Optics tripped. Wire scanners running independently. Both quiet & loud sparks. 3 Consistent marks in the strip tool. Reset.

Brought BIAS down to 55 kV. EE to -2.5 kV. BIAS & EZL currents have a small drop.

Tuesday, June 04, 2019, 13:21: BIAS / EE / EZL @ 50 / -2.5 / 7.5 kV. Over 1 hr no sparks.

Tuesday, June 04, 2019, 13:34: BIAS / EE / EZL @ 52.5 / -2.7 / 7.5 kV.

Tuesday, June 04, 2019, 13:40: BIAS / EE / EZL @ 53.5 / -2.8 / 7.5 kV.

Tuesday, June 04, 2019, 13:41: Spark* Optics & Turbo pump - TP6 tripped. Wire scanners and FC0 operated independently. Restarted. Quiet spark* Inside Vacuum chamber.

Tuesday, June 04, 2019, 13:46: Spark* Loud*, outside the vacuum chamber, above TS. EZL current jumped from 580 uA to 610 uA approx & is gradually increasing. BIAS current slowly decreasing.

Tuesday, June 04, 2019, 14:02: BIAS / EE / EZL @ 54.5 / -2.9 / 7.5 kV. Variation in EZL & BIAS currents noted.

Tuesday, June 04, 2019, 14:08: BIAS / EE / EZL @ 55 / -3.0 / 7.5 kV.

Tuesday, June 04, 2019, 14:28: 20 minutes. No Spark.

Tuesday, June 04, 2019, 14:47: BIAS / EE / EZL @ 0 kV. Anode to 0 V.

Wednesday, June 05, 2019, 08:34: BIAS / EE / EZL @ 30 / -1.5 / 7.5 kV. Anode @ 200 V.

Wednesday, June 05, 2019, 08:35: Coil down from 30 to 0 A.

Wednesday, June 05, 2019, 08:36: Open IV4.

Wednesday, June 05, 2019, 08:37: Optics on / reset.

Wednesday, June 05, 2019, 08:38: Anode to 400 V.

Wednesday, June 05, 2019, 08:44: Anode to 450 V. TBHT @ 305 A.

Wednesday, June 05, 2019, 11:15: BIAS / EE / EZL @ 40 / -2.0 / 7.5 kV. Anode @ 200 V.

Wednesday, June 05, 2019, 11:30: BIAS / EE / EZL @ 50 / -2.5 / 7.5 kV.

Wednesday, June 05, 2019, 11:40: BIAS / EE / EZL @ 52.5 / -2.7 / 7.5 kV.

Wednesday, June 05, 2019, 11:53: BIAS / EE / EZL @ 55 / -2.8 / 7.5 kV.

Wednesday, June 05, 2019, 12:04: Spark* Optics & Turbo pump - TP6 tripped. Restarted. Quiet spark* Inside Vacuum chamber. bias to 54.9 kV.

Wednesday, June 05, 2019, 12:04: IV4 closed.

Wednesday, June 05, 2019, 12:15: BIAS / EE / EZL @ 55 / -2.8 / 7.5 kV.

Wednesday, June 05, 2019, 12:16: Spark* Loud*, outside the vacuum chamber, above TS. EZL current came down from 601 uA to 537uA . IG6 off. Restarted. Bias to 54.9 kV.

Wednesday, June 05, 2019, 12:24: BIAS / EE / EZL @ 55 / -2.8 / 7.5 kV.

Wednesday, June 05, 2019, 12:35: Spark* inside vacuum chamber. Optics & turbo pumps tripped

Wednesday, June 05, 2019, 13:35: Note* 1 hour @ 55 kV no sparks.

Wednesday, June 05, 2019, 13:42: BIAS / EE / EZL @ 56 / -2.8 / 7.5 kV.

Wednesday, June 05, 2019, 13:49: BIAS / EE / EZL @ 57 / -2.8 / 7.5 kV.

Wednesday, June 05, 2019, 13:52: TSG:CB1 went red. Communication lost it.

Wednesday, June 05, 2019, 13:54: BIAS / EE / EZL @ 57.5 / -2.8 / 7.5 kV.

Wednesday, June 05, 2019, 14:01: Spark* inside vacuum chamber. Optics & turbo pumps tripped. Appears to be on the Anode. The test stand phone also redialed the last number contacted on its own.

Wednesday, June 05, 2019, 14:25: BIAS / EE / EZL @ 0 kV. Anode to 0 V. Auto-cooling @ 2 A per min.

Thursday, June 06, 2019, 09:10: Gas lines closed. Sources off. Optics off.

Thursday, June 06, 2019, 09:13: EE / BIAS on.

Thursday, June 06, 2019, 09:20: BIAS @ 30 kV.

Thursday, June 06, 2019, 09:30: BIAS @ 40 kV.

Thursday, June 06, 2019, 09:40: BIAS @ 45 kV. EZL slowly charging (Not on) from 12 to 420 V. EE with -15 V.

Thursday, June 06, 2019, 09:48: BIAS @ 50 kV. EZL / EE @ 606 / -17 V.

Thursday, June 06, 2019, 10:06:  BIAS @ 52.2 back to 50 kV. Loud buzzing heard up top. Charge on EZL from 600 V to 1200 - 2000 V fluctuations. EZL & EE to be brought up before we break something.

Thursday, June 06, 2019, 10:16: BIAS / EE / EZL @ 50 / -2.5 / 7.5 kV.

Thursday, June 06, 2019, 10:27: BIAS / EE / EZL @ 55 / -2.7 / 7.5 kV.

Thursday, June 06, 2019, 10:39: BIAS / EE / EZL @ 57.5 / -2.8 / 7.5 kV.

Thursday, June 06, 2019, 11:04: BIAS / EE / EZL @ 58 / -2.9 / 7.5 kV.

Thursday, June 06, 2019, 11:06: Buzzing / crackling up top in the cage again. Unstable voltage drops. BIAS to 57 kV.

Thursday, June 06, 2019, 11:11: BIAS / EE / EZL @ 58 / -2.9 / 8.25 kV.

Thursday, June 06, 2019, 11:27: BIAS was up to 58.5 & EZL to 9 kV. Buzzing / crackling. Unstable voltage drops / Current increase. BIAS / EZL to 57.5 / 8.5 kV.

Thursday, June 06, 2019, 11:36: BIAS was up to 58.0 & EZL to 9 kV. Buzzing / crackling. More unstable voltage drops / Current increases. BIAS dropped on it's own to 56.1 kV. BIAS / EZL to 56 / 7.5 kV.

Thursday, June 06, 2019, 11:36: Spark*. Inside chamber. Turbo pumps tripped. Buzzing stopped.

Thursday, June 06, 2019, 11:51: Unable to surpass 57 kV before voltage breakdown. Buzzing comes back. Breakdown dropped to 51 kV on BIAS.

Thursday, June 06, 2019, 11:53: BIAS @ 50 kV. EZL to 0, PS off, in attempt to relieve EZL current.

Thursday, June 06, 2019, 11:56: BIAS @ 50 kV. EZL to 7.5 kV w/ 1245 uA. Typically at 550-600 uA on EZL. Unable to relieve the current.

Thursday, June 06, 2019, 12:18: BIAS / EE / EZL @ 55 / -2.7 / 7.5 kV. Current: BIAS / EZL @ 65 / 1306 uA.

Thursday, June 06, 2019, 13:14: BIAS / EE / EZL @ 56 / -2.7 / 7.25 kV. Current: BIAS / EZL @ 70 / 1450 uA.

Thursday, June 06, 2019, 13:15: Voltage breakdown. Buzzing / crackling back. Breakdown dropped to 56.2 kV on BIAS. BIAS set to 56.1 kV to stabilize.

Thursday, June 06, 2019, 13:19: EZL current limit increased.

Thursday, June 06, 2019, 13:30: BIAS / EE / EZL  @ 56.5 / -2.7 / 7.00 kV. Current: BIAS / EZL @ 70 / 1856 uA.

Thursday, June 06, 2019, 13:31: Passed to BIAS 56.6 kV. Voltage breakdown. Buzzing / crackling. Breakdown dropped to 55.6 kV on BIAS. BIAS set to 55.5 kV to stabilize.

Thursday, June 06, 2019, 13:51: BIAS / EE / EZL  @ 56.2 / -2.7 / 7.00 kV. Current: BIAS / EZL @ 70 / 1950 uA.

Thursday, June 06, 2019, 13:52:  BIAS 56.3 kV. Voltage breakdown. Buzzing / crackling. Breakdown dropped to 55.1 kV on BIAS. BIAS set to 55.0 kV to stabilize. Unable to regain HV. Decreases each time we go up.

Thursday, June 06, 2019, 14:00: Limited via the test stand voltage breakdown up in the cage. Source tray held @ 58 kV.

Bring it down.

Thursday, June 06, 2019, 14:31: BIAS / EE / EZL @ 0 kV.

Friday, June 07, 2019, 06:41: Power / Sources off.

Friday, June 07, 2019, 06:43: IG1 & Turbo pumps off.

Friday, December 04, 2020, 13:34

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

Friday, December 04, 2020, 15:13

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

Friday, December 04, 2020, 16:07

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

Monday, December 14, 2020, 11:30

Switched off all breakers in HV cage. Started HV testing of TM3 prototype.

Monday, December 14, 2020, 12:58

Possible first spark at 18 kV.

Monday, December 14, 2020, 14:51

Nothing interesting since then, up to 33.5 kV now.

Monday, December 14, 2020, 14:56

Possible spark at 34.5 kV. 35.5 kV, 36.5, 37.5, 38.5, 39, 39.5, 40.5, 41, 41.5, 42.5, 43 (bigger current spike), 43.5, 44 (vacuum jumped for a bit), 44.5, 45 (voltage drop and vacuum jump).

Monday, December 14, 2020, 16:14

Holding at 45 kV for 10 minutes. Each of these previous "sparks" occurred just after raising voltage. Will decrease step size to 250 V from 500 V if these get more significant.

Monday, December 14, 2020, 16:19

45.5 kV. Went to observe possible spark while Carla raised voltage. Saw small flash towards bottom left, unsure of depth, but perhaps farther to the back.

46 kV. Sparking maybe in the same location. Carla reduced voltage.

Monday, December 14, 2020, 16:47

47 kV. Sort of unstable every time voltage is raised. Decreasing step size to 250 V.

Monday, December 14, 2020, 17:11

48.75 kV. Decreased current limit to 0.005 mA a couple steps previously to see effects. Seems like the current bumps at the start of each voltage raise have dropped from 0.010 mA to 0.005 mA. This seems to indicate that the current limiting is working and is controlled by EPICS. Pierre thinks the prototype must be pretty clean since the testing has been pretty smooth up to this point.

Monday, December 14, 2020, 17:29

49.75 kV. Heard what sounded like an air piston in the background and also saw a large drop in voltage. Voltage dropped in a similar manner a couple minutes after but without the sound. No effect on the vacuum though.

Monday, December 14, 2020, 17:45

50 kV. Held for 8 minutes and then a sound again occurred that sounded like some sort of pneumatic system; along with this a total drop in voltage, but no change in vacuum Otherwise completely stable. Will hold for another 10 minutes or so and ramp down.

Monday, December 14, 2020, 17:53

50 kV. Stable. Starting ramp down.

Monday, December 14, 2020, 18:11

Voltage ramped down. Vacuum has been at around 1.13e-6 Torr throughout this. Shut off power supply. Dumped data to TM3HVtest-20201214-Prototype_2, and earlier I dumped to TM3HVtest-20201214-Prototype. GoPro is taped to vacuum box window.

Tuesday, December 15, 2020, 11:15

Vacuum at 1.0e-6 Torr. Turned bias power supply on, starting HV ramp at 500 V increments, increasing every 30-50 seconds seconds or so.

Tuesday, December 15, 2020, 12:47

Reached 50 kV. Not a single dip in voltage, significant current bump, or change in vacuum up to this point. Will hold for 10 minutes before continuing.

Tuesday, December 15, 2020, 12:57

Continuing voltage ramp. Decreasing increments to 250 V as this is uncharted territory, and that rate of increase seemed safe yesterday. Will also hold at each voltage for about 2 minutes after no signs of activity.

Tuesday, December 15, 2020, 13:04

Small dip in voltage and wiggle in current at 50.75 kV, no change in vacuum.

Spark at 51.25 kV with change in vacuum; reduced voltage temporarily. Did the same at 51.75 kV. Did the same at 52 kV, but let it sort itself out this time since it didn't seem too violent.

Actual spark at 52.25 kV with big voltage drop, and I saw it happen. On the vacuum gap side, somewhere in the flat plane and close to the middle. Another spark after about 3 minutes of holding. Just missed recording it but I saw it on the feed of the GoPro; maybe in a similar location as the previous. Another 1 minute later, didn't see it this time. The last two had no effect on vacuum.

Tuesday, December 15, 2020, 13:31

5 minutes since last spark. Raising voltage again, this time recording with GoPro. Spark captured at 53 kV. No change in vacuum... until a minute later.

Tuesday, December 15, 2020, 14:46

55 kV. Each time voltage is raised, it takes a couple seconds to reach a stable voltage. During this time the current limit of 0.005 mA seems to be drawn. Will reduce current limit to 0.001 mA to see effect. Dumped StripTool data at 55.25 kV.

Recorded spark at 56 kV. Voltage took longer to recover as a result of the reduced current limit.

58.5 kV. Effect of reducing current limit seems to make it take longer to reach a stable voltage. I think this is a good thing as it should smooth out the conditioning. Sparked here twice, reduced voltage for a bit before bringing back up again.

Tuesday, December 15, 2020, 16:23

60 kV. Sparked twice. Carla observed some: a couple small ones on the face of the insulator as the voltage was recovering from the first spark followed by a large one that went all the way across. Only the larger events seem to be captured by the GoPro.

Tuesday, December 15, 2020, 16:47

Finished holding at 60 kV to 20 minutes with no sparks other than the other two previously mentioned. Resuming voltage increases.

Tuesday, December 15, 2020, 17:02

61.5 kV. Small spark but not full breakdown, then a large spark that cut voltage to 0 V. Voltage dropped relatively slowly to about 48 kV. Lowered the voltage limit to 44 kV. During this entire time, 0.001 mA of current was being drawn. Carla started raising voltage while increasing the current limit as needed to reach the set voltage.

Tuesday, December 15, 2020, 17:44

Back at 60 kV and holding. Drawing 0.005 mA to 0.006 mA though. This is different from earlier when it was holding 60 kV with no current draw.

Tuesday, December 15, 2020, 19:02

Held 60 kV for an hour with current staying constant around 0.005 mA. Ramped down (first ramped down current to see effect) and then ramped down voltage. Shut off power supply.

Wednesday, December 16, 2020, 10:30 (Carla) :

Started ramping up about 45 mins ago, now at 50kV with no issues. No sparking, occasional current draw to get to the next voltage step. Test piece is no longer drawing any current, as opposed to yesterday when it was drawing around 4uA at this point. Trace left on insulator must have partially evaporated in the vacuum overnight.

Wednesday, December 16, 2020, 10:34 :

Starting to draw some current at 50.5kV. Drawing 4uA at 55kV.

Wednesday, December 16, 2020, 10:51 :

Back up to 60kV, no sparks so far and no issues, though it is still drawing 5uA of current, as it was yesterday.

Wednesday, December 16, 2020, 12:28 (Alexander)

No sparks at 60 kV for 1.5 hours. Starting voltage increases again at 250 V increments. Currently limiting current to 6 uA. Current draw is 4 uA.

Wednesday, December 16, 2020, 13:20

63 kV. Appears current limited, increased current limit to 7 uA. First spark was at 62.75 kV.

63.25 kV. Seems current limited again but eventually reached a stable voltage after a minute. Increased current limit to 8 uA for next voltage increase.

63.5 kV. Spark.

63.75 kV. Unstable trying to reach voltage, appears current limited. Small spark followed by a big one on the rise of the previous. Second one activated something pneumatic nearby. Reduced voltage by 250 V. Looked at vacuum system but nothing abnormal.

63.5 kV. Spark, not recorded on GoPro. Stable after 5 minutes. Continuing.

63.75 kV. No longer current limited and reached voltage stably. Dumped data.

Wednesday, December 16, 2020, 14:02

64.5 kV. May be current limited again, took over a minute to reach stable voltage.

Note: None of the sparks recorded today so far have produced a response in the vacuum, which is holding steady at 1e-6 Torr.

65 kV. Smooth transition to it. Drawing 5 uA.

65.25 kV. Spark after voltage instability and current draw at 8 uA limit. Moved the Faraday cup, which made a sound. This is the sound I heard earlier. Lower current draw after the spark, back at 5 uA.

Wednesday, December 16, 2020, 15:20

Stable at 65.25 for an hour, no sparks.

Spark at 66 kV. Current limited and unstable voltage for about 2 minutes afterwards, then stable with current back to 6 uA.

Spark at 66.5 kV after some voltage instability and current limiting. Afterwards current and voltage returned to stability.

67 kV, two sparks, one right after the other. The second produced a bump in the vacuum. Reduced voltage. Brought back up easily; current stable at 5 uA.

67.25 kV. Spark. No instability preceding it for a good 20 seconds.

67.5 kV. Spark. Instability before, none after.

Wednesday, December 16, 2020, 16:08

68 kV. Spark. Instability before, none after. Vacuum dropped about 20 seconds after recovering. Current also dropped to 4 mA, at about the same time the vacuum dropped. Dropping current limit to 7 uA.

68.25 kV. Vacuum jumped back up to earlier values and then an eventual spark after some instability. Returned to stability after spark. Current now at 5 uA.

68.75 kV. Spark.

69 kV. Carla went to look inside. Saw some small sparks towards the back between the HV sheath and GND sheath in the small gap side. Very little registered in EPICS, though. Just a couple jumps in current and small dips in voltage. Not visible in GoPro footage.

Wednesday, December 16, 2020, 16:38

69.25 kV. Two sparks. Stable after second. Third spark. Reviewed GoPro footage because third spark was suspicious. Appears on video but not near or on the prototype. Could have been the wire. Dumped data.

69.75 kV. Some instability paired with a change in vacuum for the same duration.

70 kV. Carla went to look. Nothing visible on the StripTool but Carla said she saw small sparks towards the back. Going to leave here for 20 minutes before raising again.

Wednesday, December 16, 2020, 17:12

Held for 20 minutes at 70 kV with no action. Starting voltage increases again.

70.25 kV. Two and a half minutes of voltage instability, raised vacuum, and limited current. All of them stopped and started at the same time. Seems like conditioning to me.

70.5 kV. Carla saw two very faint sparks towards the back on the small gap side. Little appeared in EPICS. Spark followed maybe a minute and a half later. 2nd spark four minutes after that. Before and between those sparks the current was generally at 5 uA. About a minute after the 2nd, the current dropped to 4 uA.

70.75 kV. Short conditioning (response from all 3 monitors) period of about 10 seconds.

71 kV. 2 sparks one minute apart with some conditioning in between and after.

71.5 kV. Spark followed by 2 minutes of conditioning.

71.75 kV. One minute of conditioning.

Wednesday, December 16, 2020, 18:06

72.25 kV. Spark followed by a minute and a half of conditioning.

72.75. About a minute of conditioning.

73 kV. Instant spark followed by about a minute of conditioning.

73.25 kV. 30 seconds of conditioning then a spark. 1 minute of conditioning, then another spark, and conditioning done right after. Second one sounded like it activated the Faraday cup.

73.75 kV. Sporadic and weak conditioning? A few blips in voltage and current over about a minute and a half.

74 kV. Similar to previous but even less significant.

74.5 kV. Two minutes of conditioning.

Wednesday, December 16, 2020, 18:52

75 kV. 30 seconds of conditioning. Spark. 2.5 minutes of conditioning. 2nd spark. 10 seconds. 3rd spark; lowering voltage by 250 V for stability to capture footage of previous 3 sparks. Stable here for 5 minutes.

Wednesday, December 16, 2020, 19:01

75 kV. Nothing happening. Gonna leave for 30 minutes.

Wednesday, December 16, 2020, 19:31

75 kV for 30 minutes. No sparks or any other anomalies. Vacuum has been around 9.5e-7 Torr. Current hovering around 5 uA. Starting voltage ramp down.

Wednesday, December 16, 2020, 19:43

Ramped down. Nothing interesting. Turned power supply off in EPICS. Still on physically such that ramp up tomorrow can start remotely. Dumped data.

Thursday, April 02, 2015, 15:42: Roughing

Thursday, April 02, 2015, 16:12: Turbos started

Thursday, April 02, 2015, 16:22: Turbos at speed. Vacuum at 8.7E-6 T

Tuesday, April 07, 2015, 08:24: Opened water for HS. Vacuum stable at 1.1E-7 T

Tuesday, April 07, 2015, 08:25: Pumping on gas lines.

Tuesday, April 07, 2015, 08:37: Finished pumping.

Tuesday, April 07, 2015, 08:41: Opening gas valve to vacuum chamber

Tuesday, April 07, 2015, 08:42: RGA filament on.

Tuesday, April 07, 2015, 08:55: BIAS/EZL/EE to 30/14/1.5 kV

Tuesday, April 07, 2015, 08:55: COIL to 50 A,  ANODE to 200 V

Tuesday, April 07, 2015, 09:01: Started auto-heating to 580/250 A at 2 A/min

Tuesday, April 07, 2015, 13:25 : Opened IV4

Tuesday, April 07, 2015, 15:10: Ramping TBHT to 290A

Wednesday, April 08, 2015, 09:27: Opening for Ne gas

Wednesday, April 08, 2015, 12:05: BIAS/EZL to 40/18.5 kV

Wednesday, April 08, 2015, 13:15 :BIAS/EZL/EE to 50/23.5/2.0 kV

Wednesday, April 08, 2015, 15:15: BIAS/EZL/EE to 30/14/1.5 kV

Thursday, April 09, 2015, 11:19: Starting target cool down

Thursday, April 09, 2015, 16:54: BIAS/EZL/EE to 30/30/1.5 kV

Thursday, April 09, 2015, 17:58: BIAS and source off.

Friday, April 10, 2015, 08:21: Closed gas supply

Friday, April 10, 2015, 08:23: Stopped turbos

Thursday, June 25, 2015, 09:00: Water on HS. No vacuum response.

Thursday, June 25, 2015, 11:48: Started auto ramping heaters.

Thursday, June 25, 2015, 17:14: Target at 580/275 A. BIAS/EZL/EE at 30 / 13.5 / 1.5 kV

Friday, June 26, 2015, 08:04: Stopped TP1B for outgasing measurements

Friday, June 26, 2015, 10:25: Performing outgasing measurements

Friday, June 26, 2015, 10:35: Starting TP1B.

Friday, June 26, 2015, 10:39: TP1B at speed.

Friday, June 26, 2015, 11:12: Started cool-down.

Friday, June 26, 2015, 11:47: BIAS/EZL/EE/COIL/ANODE off

Friday, June 26, 2015, 11:47: Closed IV4

Tuesday, June 30, 2015, 13:32: Venting

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

The coil insulator has been observed to have cracked earlier. 

 The insulator for the TGHT terminals cracked during an attempt to remove a seized bolt.The right TGHT block was removed with the target and the bolt cut to remove the target. The single stand-off insulator on the target assembly cracked in the process.

Friday, March 04, 2016

Re-installed the TGHT terminal with new Keensert.

HS line is looped. Cu-test bars installed on TGHT and TBHT. Torqued all bolts  to 120 in lbs.

Tuesday, October 15, 2013, 16:17: Roughing

Tuesday, October 15, 2013, 16:39: Turbos started.

Tuesday, October 15, 2013, 16:48: Turbos at speed

Tuesday, October 15, 2013, 16:49: Vacuum at 3.0 E-5 T

Wednesday, October 16, 2013, 08:38: Opened water on HS. Vacuum stable at 5.5E-7 T.

Wednesday, October 16, 2013, 10:12: TBHT to 300A (0.623V) TGHT to 580A (1.443 V)

Wednesday, October 16, 2013, 10:13: Ramping down at 6A/min

Thursday, October 17, 2013, 08:33: Turbos stopped. Vacuum at 2.6E-7 T.

Thursday, October 17, 2013, 10:24: Venting

Turned TGHT Cu-bar 180 deg. Loosened and re-fastened all bolts to 120 in lbs.

Thursday, October 17, 2013, 10:48: Roughing.

Thursday, October 17, 2013, 11:07: Turbos started.

Thursday, October 17, 2013, 11:16: Turbos at speed.

Thursday, October 17, 2013, 11:17: Vacuum at 1.2E-5 T

 TGHT and TBHT were brought up to 580A and 300A.

Flow meters connected.

TGHT
T  27.8
Q 5.5

Monday, October 21, 2013, 13:34: Heating TGHT to 580A (1.411 V)

Monday, October 21, 2013, 13:37
TGHT
T  28.9
Q 5.4

Monday, October 21, 2013, 13:40
TGHT
T  29.1
Q 5.5

Monday, October 21, 2013, 13:45
TGHT
T  29.4
Q 5.4

TGHT RDCUR/VOL 581.5A / 1.421 V

Monday, October 21, 2013, 13:47
TGHT RDCUR/VOL 270.6 A / 0.674V
T  28.4
Q 5.4

Monday, October 21, 2013, 13:52
TGHT RDCUR/VOL 270.6 A / 0.674V
T  28.3
Q 5.5

Monday, October 21, 2013, 13:52: TGHT off.

TGHT
T  27.9
Q 5.5

Tuesday, October 22, 2013, 08:09: Stopped turbos. Vacuum at 1.4E-7 T

Tuesday, October 22, 2013, 12:29: Venting

Results in DocuShare collection

Monday, March 11, 2019, 13:55: The TGHT PS was replaced.

Brought up to 20 A. Operation. ok.

Monday, June 03, 2019, 10:36: BIAS Near 55 kV, brought back down to 50 kV. Multiple sparks. Optics tripped, wire scanners & FC0 began running independently. Anode current dropped from 7.328 mA to 6.105 mA. Knocked out the TGHT

The target heater dropped from 580A to 3.1 A. Attempted reset. Non-responsive.

Monday, June 03, 2019, 10:46: TGHT Still non-responsive. Bump down HV to open the cage & cycle the PS.

PS model: Xantrex XPR 10-600

Message lights on the front of the power supply:

OTP - INT - OVP - SNS Triggered.

Thursday, June 13, 2019, 14:05: ELOG 732 - PS replaced.

Heat TGHT to 580 A & TGHT to  200 A for view port test.

Tuesday, August 15, 2017, 08:40: Roughing.

Tuesday, August 15, 2017, 08:59: Both Turbo pumps started.

Tuesday, August 15, 2017, 09:05: Ion gauge on. TP1B @ speed 42 KRPM.

Tuesday, August 15, 2017, 09:07: TP1A @ speed 38 KRPM.

Tuesday, August 15, 2017, 09:10: RGA on. Vacuum @ 9.14e-06T

Tuesday, August 15, 2017, 11:40: Check. Vacuum @ 6.76e-07T

Tuesday, August 15, 2017, 11:41: Waterlines opened. No response on RGA. Vacuum @ 6.49e-07T

Tuesday, August 15, 2017, 11:43: Power/sources on.

Tuesday, August 15, 2017, 13:57: Check. Vacuum @ 3.88e-07T.

Tuesday, August 15, 2017, 14:33: Auto ramping TGHT / TBHT to 580 / 200 A @ 2A per min.

Wednesday, August 16, 2017, 10:33: Auto-cooling TBHT to 100 A @ 4A per min.

Thursday, August 17, 2017, 07:05: TGHT / TBHT off. FC0 closed. IV4 Closed.

Thursday, August 17, 2017, 07:11: IV4 reset.

Thursday, August 17, 2017, 07:13: Power off

Thursday, August 17, 2017, 07:15 Waterlines purged

Thursday, August 24, 2017, 13:03: Waterlines ok (open). Power/source on.

Thursday, August 24, 2017, 13:10: Auto ramping TGHT to 580 A @ 2A per min.

Friday, August 25, 2017, 07:59: Open IV4. Open TMS : FC0.

Friday, September 08, 2017, 06:51: Auto ramping TGHT to 580 A @ 2A per min.

Monday, September 11, 2017, 10:55: Close TMS : FC0. Close IV4

Monday, September 11, 2017, 11:58: power/sources off

Monday, September 11, 2017, 11:00: RGA off

Monday, September 11, 2017, 11:01: Ion gauge, turbos off.

Monday, September 11, 2017, 11:59: Venting.

Monday, September 11, 2017, 13:17: Roughing.

Monday, September 11, 2017, 13:34: Turbo pumps on

Monday, September 11, 2017, 13:40: Ion gauge on.

Tuesday, September 12, 2017, 07:24: RGA, power, & sources on.

Tuesday, September 12, 2017, 07:25: Auto ramping TGHT to 580 A @ 2A per min.

Tuesday, September 12, 2017, 07:26: Open IV4. Open TMS : FC0.

Monday, September 18, 2017, 10:53: Close TMS : FC0. Close IV4

Monday, September 18, 2017, 10:57: Power/sources off.

Wednesday, September 20, 2017, 10:25: RGA, Ion gauge, Turbo pumps off. Waterlines purged.

Wednesday, September 20, 2017, 12:49: Venting.

 The Xantrex 10V 600 A power supply for the TBHT has been moved to ITE to replace the failed TGHT power supply

Anders Mjos wrote:

The Xantrex 10V 600 A power supply for the TBHT has been moved to ITE to replace the failed TGHT power supply

 A spare EMI-EMS 10 V - 500 A power supply was installed last Friday by John Chow. Dave Morris has connected the controls today and updated EPICS. The local voltage readback on the power supply does not work.

Thursday, July 04, 2019, 15:00: TBHT insulator was swapped out on the source tray side. 

The old one is very chipped.

Thursday, February 19, 2015, 12:14: Starting system again after the power outage

Thursday, February 19, 2015, 13:27: The performance of RP1 has degraded. Edi flushed some air through, which helped a bit. It now takes longer to start up.

Thursday, February 19, 2015, 13:33: Vacuum recovered.

After not being able to get beam through the emittance meter. I diagnosed that the plates was not biased (reason yet unknow).

I swapped the cables from the plates such that it looks like the picture below. With this, I was able to take an emittance scan with the previous parameters.

Varying the optics affect the shape and position of the emittance so I believe this is a real signal.

Keeping this configuration until I finish my measurement.