Opened the ATTS, placed what I will call “Cast Alumina Sample #1” into the ATTS and activated the roughing then turbo pumps. Currently sample is in slow heating progress to 1000 degrees Celsius, process is expected to take some time, so I'll revisit after lunch.

Monday, December 16, 2024, 3:34   Target loaded in test stand. Confirmed correct connection to mass marker power supply through multipin. Bottom left pin (5 PS - ) connected to grounded side of the filament, top right pin (2, PS +) connected to top end of filament.

Tuesday, December 17, 2024, 09:30 Turbo pumps on

Tuesday, December 17, 2024, 16:21  water cooling on. No effect on vacuum. Vacuum stable at 1.18e-6T

Tuesday, December 17, 2024, 16:41   ramping TGHT TBHT at 1A/30s

Wednesday, December 18, 2024, 10:00  slowly increasing BIAS/EE/EZL to 30/2.5/13 kV

Wednesday, December 18, 2024, 11:40   BIAS EE EZL at 30 2.5 13 kV. 1 spark at 28kV, and there was a downward spike in the TGHT current when bias was at 28.5 kV  

Wednesday, December 18, 2024, 11:41   FC0 reading 1.6E-10 A. quite low for total beam, but this is likely due to this target being hot so many times.

Wednesday, December 18, 2024, 11:51 wire scans taken (RPM0)

Wednesday, December 18, 2024, 11:54 FC) extracted for mass scan - mass scan beginning now . Background record appears to be functioning well, although it is high. comparatively to old tests. It could be that those old tests were recording irregularly low background, given the temporary solution that was implemented.

Wednesday, December 18, 2024, 12:13   it seems that a spark took down many optics elements. Going to allow conditioning at 30kV for a while before restarting .     - optics elements down due to pressure sensor TMS:IG6 timing out. Vacuum group notified. Will likely bypass the interlock temporarily if it cannot be fixed fast. This should get a more permanent solution as it has failed a number of times before.

 Wednesday, December 18, 2024, 13:06    sparks are occurring on average approximately once every 10 minutes. they don't seem to be tripping of any supplies or optics (after IG6). but this spark frequency is significantly higher than observed on other targets lately.

Wednesday, December 18, 2024, 13:24   restarting Mass scan with IG6 interlock forced by.   scan name - 2024-12-18_13-47 SISP2N mmOFF.txt

Wednesday, December 18, 2024, 13:51   put FC0 back in, preparing to heat up mass marker.  will plan to ramp to 3A to match previous MM tests.     also, no sparks in the past 40 minutes, it appears they have subsided.    additionally, IG6 has been fixed by vacuum group

 Wednesday, December 18, 2024, 14:15   mass marker power supply is not connecting. When attempting to write to its IP address it times out. Had to drop the HV in order to investigate. Have enlisted controls group to aid as it appears to be connected and should be functional.  

Wednesday, December 18, 2024, 14:30   had to reset the computer connection to the network 192.168.5. by unplugging and plugging in the usb ethernet connection at computer. situation resolved.

Wednesday, December 18, 2024, 14:40   HV back up and now increasing the mass marker current from 0A to 3A, at 0A, FC0 current is 1.4e-10, very close to previously recorded FC0 mm0A value.

Wednesday, December 18, 2024, 14:56 with mm current at 3.0A, requiring 6V, FC0 current is 2.1e-10 A.   

Wednesday, December 18, 2024, 14:58  withdrawing FC0 to take mass scan

Wednesday, December 18, 2024, 15:25   mass scan complete:  filename 2024-12-18 15-23 SISP2N mmON.txt

Wednesday, December 18, 2024, 15:27   further increasing mm current to 4.0A.  FC0 current increasing noticeably. waiting for plateau. FC0 at 6.6e-10A.   wire scans taken

Wednesday, December 18, 2024, 15:39  new mass scan:  2024-12-18 15-53 SISP2N mmON 4A.txt

Wednesday, December 18, 2024, 15:52  mm power supply turned off. 0A.

Wednesday, December 18, 2024, 15:53  rescan of high mass region. still a residual indium mass peak present. will scan again after cooling more.

Wednesday, December 18, 2024, 16:10   mass scan captured that shows the indium peak almost masked in background 

Given that the indium peak for 3A was significantly lower than with a regular SIS source cup, i recommend that this target is heated up with the regular source cup again to compare.

 Wednesday, December 18, 2024, 16:11 dropping HV EE EZL to 0V

Wednesday, December 18, 2024, 16:13 cooling target to 0/0A at 1A/30s

 Tuesday, January 07, 2025, 16:00 -  Target assembly installed in test stand. electrical connections assessed:

Prior to installation:  oven and cathode isolated from heatshield. no shorts

After installation:  Oven and Cathode 35kΩ from HVC. 

Tuesday, January 07, 2025, 16:05  -  pumping down to rough vacuum

Tuesday, January 07, 2025, 16:45  TP1B on.      TP1A on.  Pumping down

Prior to proceeding, ensure that ALL water cooling is turned on, as it was all drained and empty for the past 2 weeks.

Tuesday, January 07, 2025, 17:10   Beam line TP1 and TP2 on. 

Wednesday, January 08, 2025, 09:01    chamber pressure at 1.0E-6 T,  beamline pressure at 3.7E-7 T

 Wednesday, January 08, 2025, 10:32 - water cooling all on. no effect on vacuum pressure. 

Wednesday, January 08, 2025, 10:33    - Increased argon pressure in the gas line has no effect on vacuum pressure. it is registered on the pressure gauge at feedthrough.- 

  - However, roughing pump doesn't seem to be venting the argon gas line. I disconnected the copper line to the venting valve to confirm pump activity. - no activity detectable. 

- removed pump from assembly. switching on by itself shows no evidence of pump functionality. When on, pump is heating to very hot temperatures. I've emailed Edi at vacuum group to investigate further.

Wednesday, January 08, 2025, 15:02   - Vacuum group says that the pump is dead. We can replace it if we'd like, but i've created a temporary solution by connecting the argon venting valve to the backing pumps. For the sake of being careful (although this may be overly cautious), we must avoid opening this venting valve without first isolating the connection from the turbo pumps via closing TSG:PV1

Wednesday, January 08, 2025, 15:04  ramping up COIL to ensure conditioning against outgassing later.  vacuum appears to be stabilizing below 2e-6 T

Wednesday, January 08, 2025, 16:32   vacuum recovered, beginning to heat at 1A/30s up to 580A/230A    TGHT/TBHT

Wednesday, January 08, 2025, 22:32   with COIL on, the vacuum pressure increased to ~2.2E-6 T before beginning to recover, leaving on to encourage vacuum recovery.

Thursday, January 09, 2025, 08:27 Vacuum at 1.0E-6 T.  COIL off.

Thursday, January 09, 2025, 10:15   Argon gas line at 0.5 bar.a

Thursday, January 09, 2025, 10:56   increasing BIAS/EE/EZL  to 30/1.5/13 kV 

Thursday, January 09, 2025, 11:19    turning on optics elements. TMS:Q2 is timed out and possibly unalive. - must be investigated

Thursday, January 09, 2025, 12:38  HV at 30kV. monitoring for spark activity 

Thursday, January 09, 2025, 12:53  over 15 minutes, there was just one possible spark.  I see also that TPS:Q2 (quadrupole prior to FC0) seems to be half-down. i can't seem to get it to stop timing out and recharge. must investigate further

after investigating further and attempting to reset/reconfigure. I tried power cycling the canbus controller as well. In the end, controls group determined that this controller needed to be replaced.

 Thursday, January 09, 2025, 14:34   all optics set.  setting COIL CATHODE to 40A 120V.   CATHODE is leaking 0 current. (0.000 mA readback).  

Thursday, January 09, 2025, 14:37   reading 2.91e-8A at FC0 . found Argon peak at 40 exactly. MB1 current 96.4561 A

Thursday, January 09, 2025, 14:42 using COIL CATHODE scan program to optimize. (data file measure_id=9106)  A local maximum was identified at 140V with 40A coil current. However, a short seems to show up when the cathode voltage reaches ~130V. it lets through only ~10mA at 130 and then will release up to at least 100mA at 140V.

As time passes, the sustained voltage drops over time, given a current limit of 100mA. it dropped to ~50V. On subsequent increases of the power supply, current begins leaking through at ~65V. 

Given this, I will continue (while monitoring the cathode power supply) with a cathode coil of 50V 90A.

Thursday, January 09, 2025, 15:28  FC0 = 2.21 e-8 A.    FC6 at 3.21e-10A   RPM taken for all 4.

Thursday, January 09, 2025, 16:04   mass scan complete  -  2025_01_09-16_01 FEBIAD no retainer 1.txt CATHODE voltage was stable at 50V throughout.

 Thursday, January 09, 2025, 16:07  decreasing BIAS/EE/EZL to 0, 0, 0

 Friday, January 10, 2025, 09:09    ramping BIAS/EE/EZL  to 30/1.5/13 kV 

Friday, January 10, 2025, 11:51 Increasing COIL and CATHODE to 90A and 50V (was able to ramp cathode up to 100V before seeing current loss)

Friday, January 10, 2025, 11:53   FC0 = 1.7e-8 A.    FC6 = 4.9e-10 A    wire scans taken.

Friday, January 10, 2025, 12:00     Beginning mass scan with COIL CATHODE at 90A 50V   - 2025_01_10-12_28 FEBIAD no retainer 2.txt

Friday, January 10, 2025, 12:28   decreasing BIAS/EE/EZL to 0, 0, 0

 Friday, January 10, 2025, 13:15   gas inflow OFF (at rough vacuum pressure). Ramping up again BIAS/EE/EZL  to 30/1.5/13 kV 

Friday, January 10, 2025, 14:27   FC0 = 1.22e-8A.   FC6 = 2.93e-12A  (at 40) .   mass scan taken  = 2025_01_10-14_18 FEBIAD no retainer 3 argon off.txt     wire scans taken.

Friday, January 10, 2025, 14:28   TGHT TBHT cooling to 0A 0A at 1A/30s
 

Monday, January 13, 2025, 11:00   testing cathode isolation on cold target by ramping up cathode voltage until breakdown.   At 120V, CATHODE current is 2.4mA. (125V, 8.5mA), at 130V, current limiting and dropping voltage.

 Monday, January 13, 2025, 11:10   power supplies off. Winding down turbo pumps for chamber evac

Monday, January 13, 2025, 13:07   venting 

See attached file for photos of the broken tube 

Both turbo pumps at the source box were found off. TSG:TP1A has been started normally. TSG:TP1B does not spin up above 3KRPM even after several attemps. A fault report has been send to vacuum group.

Friedhelm Ames wrote:

Both turbo pumps at the source box were found off. TSG:TP1A has been started normally. TSG:TP1B does not spin up above 3KRPM even after several attemps. A fault report has been send to vacuum group.

 after about 30 minutes running at normal speed TP1A failed as well. Both pumps will be kept off over night.

Both turbo pumps at the source box cannot be started. A fault report has been issued.

The backing pressure at TSGRP1 does not go below 578 mT. Fault report to vacuum.

turbo pumps in source section and all ion gauges off all optics and heaters tripped. Reason unknown.

Friedhelm Ames wrote:

turbo pumps in source section and all ion gauges off all optics and heaters tripped. Reason unknown.

 Checked the Archiver and the striptool: TSG:TP1A & TP1B tripped on Oct. 10, at 7:53am. Both pumps showed timeout, but the AC breakers were not tripped. Also, checked with MCR: they were no power bumps or cooling water problems around that time. 

Discussed it with Kazuya Negishi from Controls: there were no PLC problems. Kazuya and I would monitor the trips. 

Monday, February 01, 2021, 08:38 : The anode seems to be shorted but we can still test the  amount of dispersion at the image position, and correlate with energy spread.

Monday, February 01, 2021, 11:27: Bias/EZL/EE @ 30/0/1.5 kV. 

 Monday, February 01, 2021, 11:44: Mass scan in progress. The peaks appear to be shifted. Large peak at  m/q160 and double peak at m/q 100u, where I think it should be 133Cs and 85Rb and 87Rb.

Monday, February 01, 2021, 14:04: HV turned itself off, nothing tripped nor change. Not sure if related to the emittance scan that I was running. Setting it to zero before restarting it.

Monday, February 01, 2021, 20:14: Ramping things down and call it a day. My laptop charger broke and I don't want to leave the HV on.

Wire scanners look fine but the emittance meter was not working. Keiko soft reboot it but to luck. 

AS

Tuesday, February 02, 2021, 08:51: E-rig re-calibrated. Mass scans taken. It appears we have evaporated all the salts. Turning off the HV & auto-cooling @ 3A per min.

Tuesday, February 02, 2021, 12:18: IV4 closed, power/sources off. Turbo pumps off.

Tuesday, February 02, 2021, 12:50: Venting.

Remove, add salts, EE ok.

Tuesday, February 02, 2021, 13:58: Rouging.

Tuesday, February 02, 2021, 14:26: Turbo pump on - TP1B.

Tuesday, February 02, 2021, 14:37: Turbo pump on - TP1A. Ion gauge on.

AS

Wednesday, February 03, 2021, 07:36: Vacuum ok @ 1.01e-06 T.

Wednesday, February 03, 2021, 07:38: Opened FS#5. Vacuum ok.

Wednesday, February 03, 2021, 07:41; Power / Sources on. Optics on.

Wednesday, February 03, 2021, 07:43: Auto-ramping TGHT / TBHT to 350 / 150 A @ 4 A per min.

Wednesday, February 03, 2021, 07:46: IV4 open

Wednesday, February 03, 2021, 07:48: BIAS / EE / EZL @ 20 / -1.0 / 0 kV to start. will go to 30 & 1.5 kV once the TGHT reaches 350 A.

Wednesday, February 03, 2021, 09:40: Auto-ramping TGHT / TBHT to 580 / 230 A @ 2 A per min.

Wednesday, February 03, 2021, 10:55: BIAS / EE / EZL @ 30 / -1.5 / 0 kV. Lot's of sparks on the initial conditioning from 8:30am until almost 10:20. Appears stable now.

 FM

Wednesday, February 03, 2021, 13:01: Spark. The HV bias voltage remained at 10 kV for several seconds. TSG:CBC was @ 2500 V. Likely, a sustained discharge towards the steerer had the HV bias power supply to get current limited

 Wednesday, February 03, 2021, 13:25: HV bias power supply gets current limited as of 15 kV. Setpoints to 0 to allow some discharge. Didn't work. Asking someone on site to have a look on the PS.

No sign whatsoever of a spark  to any device.

Wednesday, February 03, 2021, 18:27: HV has been erratic all day. Waiting for some stabilization allowed the system to reach ~24 kV. Now it has dropped to 20 kV.

Wednesday, February 03, 2021, 18:28: Increasing current limit on the bias PS from 0.015 to 0.02 mA

Wednesday, February 03, 2021, 18:55: Spark in the water lines. Current drop 60% from 0.03 to 0.01 uA. Spark observed in the GND electrode water lines

Wednesday, February 03, 2021, 19:11: Able to reach 28 kV but a spark ocurred.  TSG:CBC adn TSG:Q1 readback 2500 and 1500 V (similarly to the spark at 1 pm). Bias is current limited again, even at the new current limit.

• I think there might a short with one of the steerers cables, or a bit unlikely, to the quad.
• Slow charge up process, that does not discharges.

Wednesday, February 03, 2021, 19:32: Bias/EZL/EE @ 0.000 kV

Wednesday, February 03, 2021, 22:59: Tapped down TGHT/TBHT to 500/200 A to preserve the salts.

AS

Thursday, February 04, 2021, 06:42: Auto-cooling TGHT / TBHT down to 300 / 150 A. 

Thursday, February 04, 2021, 09:14: Optics set to standard settings. Checking BIAS w/ EE & EZL 

Thursday, February 04, 2021, 09:21: BIAS / EE / EZL to 16.5 / -1.0 / 10 kV. Actual on BIAS 14.5 to 15 kV on BIAS:RDVOL & w/ 0.029 mA on BIAS:RDCUR.

Thursday, February 04, 2021, 09:24: BIAS discharge. 16.5 kV on BIAS:RDVOL & w/ 0.004 mA on BIAS:RDCUR.

Thursday, February 04, 2021, 09:32: Brought BIAS up to 19 kV, but then it sparks and dropped to 13.5 kV on BIAS:RDVOL & w/ 0.029 mA on BIAS:RDCUR. Brought the BIAS down to 13 kV, & the current dropped out, then stabilized. Brought it back up to 16.5 kV. Holding 16.5 kV on BIAS:RDVOL & w/ 0.004 mA on BIAS:RDCUR.

Thursday, February 04, 2021, 09:36: BIAS / EE / EZL to 16.5 / -1.0 / 10 kV

Thursday, February 04, 2021, 09:39: Auto-cooling TGHT / TBHT down to 0 A. 

Thursday, February 04, 2021, 09:40: 17 kV - BIAS:RDVOL / 0.005 mA - BIAS:RDCUR.

Thursday, February 04, 2021, 09:45: 17.5 kV - BIAS:RDVOL / 0.005 mA - BIAS:RDCUR.

Thursday, February 04, 2021, 09:51: 18 kV - BIAS:RDVOL / 0.005 mA - BIAS:RDCUR.

Thursday, February 04, 2021, 09:55: 18.5 kV - BIAS:RDVOL / 0.005 mA - BIAS:RDCUR.

Thursday, February 04, 2021, 10:00: 19 kV - BIAS:RDVOL / 0.005 mA - BIAS:RDCUR.

Thursday, February 04, 2021, 10:14: 19.5 kV - BIAS:RDVOL / 0.005 mA - BIAS:RDCUR. 

Thursday, February 04, 2021, 10:20: 20 kV - BIAS:RDVOL / 0.005 mA - BIAS:RDCUR.  

FM

Thursday, February 04, 2021, 12:54:  20.5 kV / 0.006 mA 

Thursday, February 04, 2021, 12:58: 21 kV / 0.005 mA

Thursday, February 04, 2021, 13:02: 21.5kV / 0.006 mA 

Thursday, February 04, 2021, 13:08: 22 kV / 0.005 mA. 

Thursday, February 04, 2021, 13:12: 22.5 kV / 0.006 mA. 

Thursday, February 04, 2021, 13:58: 30 kV / 0.008 mA.

Thursday, February 04, 2021, 14:04: Spark. Bias is current limited.

Thursday, February 04, 2021, 14:39 : Small bright spot at the TGHT or HS cooling lines from the solder of the GND water lines.

Without voltage this is not noticeable. Likely a corona discharge happening at this location and hence limiting the current.

Opening to create clearance. Also to troubleshot the cathode power supply.

Thursday, February 04, 2021, 16:07: Turbos off.

Re-salted. PE removed. EE Cleaned

Monday, February 08, 2021, 09:17: Roughing.

Monday, February 08, 2021, 09:46: TP1B on

Monday, February 08, 2021, 11:45: Vacuum @ 6.70e-06T. Open waterlines

Monday, February 08, 2021, 11:49: Vacuum spike. Turn off IG1 & turbo pumps. Will vent to swap gaskets.

Monday, February 08, 2021, 12:45: Venting.

Swap & tighten.

Monday, February 08, 2021, 13:33: Roughing

Monday, February 08, 2021, 14:01: TP1B on.

Monday, February 08, 2021, 14:18: TP1A on.

Monday, February 08, 2021, 14:22: Opened waterline. Vacuum was in the e-05T range and dropping however it slowed and a spike was noted on CG1A & CG1B. Turbo pumps off to vent. Will inspect the seal face.

Monday, February 08, 2021, 15:08: Venting.

Monday, February 08, 2021, 15:57: Swapped out gaskets. Checked gasket faces & Re-installed HS. Roughing.

Monday, February 08, 2021, 16:44: TP1B on.

Monday, February 08, 2021, 16:51: TP1A on.

Monday, February 08, 2021, 16:58: IG1 on

Monday, February 08, 2021, 17:00: Opened waterlines. Backing pressure ok, Vacuum continuing to improve@ 7.90e-05T.

Monday, February 08, 2021, 17:03: Power/sources on. vacuum @ 5.19e-05T

FM

Tuesday, February 09, 2021, 00:46: IG1 @ 2.14e-6T. Auto-ramping to 580/230 @ 2A/min

Tuesday, February 09, 2021, 07:17. Anode got current limited again when TBHT/TGHGT were @ 215/215 A. 

AS

Tuesday, February 09, 2021, 08:32: BIAS / EE / EZL @ 20 / -1.5 / 10 kV

Tuesday, February 09, 2021, 09:02: BIAS / EE / EZL @ 30 / -2.0 / 13 kV

Tuesday, February 09, 2021, 09:16: BIAS remains @ 30 kV. Adjusting Optics, EE, & EZL to tune. Minimal beam on FC0 noted.

Tuesday, February 09, 2021, 10:02: HV off. Check Anode & down stream.

Tuesday, February 09, 2021, 10:36: Auto-cooling @ 4 A per min

Tuesday, February 09, 2021, 10:40: Aborted. TGHT / TBHT back to 580 / 230 A. A few more checks.

Tuesday, February 09, 2021, 10:58: Auto-cooling @ 4 A per min

Tuesday, February 09, 2021, 11:08: HV off.

Tuesday, February 09, 2021, 13:41: Power / sources off. FS#5 closed off. Turbo pumps off.

 FM.

After inspecting the ion source, and revising the electrical connections, I suspect that the TBHT was floating all the time and only when it was in contact with the plasma electrode it held HV.

When the plasma electrode was removed, there was no reference whatsoever, and the ions were not extracted.

It seems then that the resistor R4 (ISK4562D) is necessary to provide a reference to the TBHT  in a similar way R1 provides one to extraction electrode.

Tuesday, February 09, 2021, 20:52: Installing R4. If the anode works this time, it will be worth checking why this reference is necessary. From the electric diagram, the chassis ground should be HV ground.

Note* target has a ring on the TGHT - Right leg. EE & PE placed. Target to HS OL - OK.

Wednesday, February 10, 2021, 09:37: Roughing.

Wednesday, February 10, 2021, 09:45: Bypass / Force applied on IG1 to test Anode.

Wednesday, February 10, 2021, 09:46: Anode @ 10 V. Ok.

Wednesday, February 10, 2021, 09:47: Anode @ 200 V. Ok. No current.

Wednesday, February 10, 2021, 09:48: Anode to 0V & off. Bypass / Force removed from IG1.

Wednesday, February 10, 2021, 10:06: TP1B on.

Wednesday, February 10, 2021, 10:46: TP1A on.

Wednesday, February 10, 2021, 13:42: Vacuum @ 9.08e-06T. open FS#5

Wednesday, February 10, 2021, 13:46: Vacuum increased to 9.70e-06T as well as the backing pressure increased. Turbo pumps off. Going to swap the assembly out completely however continue with the same LP-SIS oven.

Wednesday, February 10, 2021, 15:20: HS 44378-3 Installed w/ LP-SIS oven #44691-8. Roughing

Wednesday, February 10, 2021, 15:48: TP1B on. 

Wednesday, February 10, 2021, 16:02: TP1A on.

Wednesday, February 10, 2021, 16:11: Bypass / Force applied on IG1 to test Anode. Anode @ 200 V. Ok. No current.

Wednesday, February 10, 2021, 16:13: Anode to 0V & off. Bypass / Force removed from IG1. EZL & EE check ok. IG1 on for real.

Wednesday, February 10, 2021, 16:14: Vacuum @ 6.12e-05T & Dropping.

Wednesday, February 10, 2021, 16:16: FS#5 open. Both IG1 & the backing lines are pumping down quickly.

Contacted MCR. Reminder, mechanical services still intends to service the DI water pump. Constant DI water flow is not guaranteed.

https://elog.triumf.ca/TIS/Test-Stand/847

Thursday, February 11, 2021, 00:13: : Anode to 10V. Auto-ramping TGHT/TBHT to 200/100 A @ 2 A/min

 Thursday, February 11, 2021, 09:03: Auto-ramping TGHT/TBHT to 400/200 A @ 2 A/min

From: Jas Uppal <juppal@triumf.ca>Sent: February 11, 2021 9:12 AM
To: Fernando Maldonado Millan <maldonado@triumf.ca>
Subject: Re: Cu-LCW water lines status for the ISAC test stand

Hi Fernando,

  There are no plans for Cu-LCW system to be switched off today.  I believe they are still working on correcting the issue that caused the trip two days ago.  Once it is corrected and we are ready to switch to the secondary pump, the switch over "should" be relatively invisible with possibly a slight drop in line pressure.

Jas Uppal 

 Thursday, February 11, 2021, 10:31: TGHT/TBHT at 400/200 A. Anode still at 10 V 

Thursday, February 11, 2021, 10:33: Auto-ramping TGHT/TBHT to 580/230 A @ 2 A/min

Thursday, February 11, 2021, 10:42: BIAS/EZL/EE @ 30/13/1.5 kV. 

Thursday, February 11, 2021, 13:42: Uncapable of holding HV. Maybe the new heatshield needs more time to outgas.

Thursday, February 11, 2021, 13:44: BIAS/EZL/EE @ 0.000 kV

Friday, February 12, 2021, 10:07: In order to trouble shoot the ISAC TS, I  let the sparks to continue. Initially, they occurred in the extraction electrode spark gap and were both visible and audible. However, they stop and the instabilitiy was present.

I rise the voltage again and let the spark happen for a longer period of time.

I saw how the collimator wire on the far back of the source tray was moving as if a hurricane was inside, which is very strange. I followed up the wire and I saw how it was sparking to something (see attached photo)

I say something because from the angle is difficult to say if it was going to the chamber itself or to the HS waterlines. Both scenarios are concerning

First of all the collimator is never biased and it if any case the jacket  (MHV cable) is on ground ground

In case the discharge happened from wire to the chamber, then the collimator wire was charging up, it is extremely important o note that the jacketed cable goes outside the box very close to one of the turbos.

In the other scenario where the discharge was happening from the wire to the HS waterlines, that is, HV to ground, the simply creating a clearance should be enough. In this case as well is relevant to know that this jackted cable leaves the farday cage.

I will create clearance from collimator wire to HS waterlines.

Friday, February 12, 2021, 10:33: BIAS/EZL/EE @ 0.000 kV

Friday, February 12, 2021, 10:35: Auto-cooling TGHT/TBHT to 0 A @ 4A/min.

Friday, February 12, 2021, 11:05: Discharge confirmed visually to go into the HS waterlines, (HV to ground) (see second photo attached)

Friday, February 12, 2021, 11:06: Inside the blue rack,  I could hear ticks that match the discharges, probably  the collimator PS is there. Will check later with things  off.

 Friday, February 12, 2021, 13:17: Turbos off.

 Friday, February 12, 2021, 14:36: Venting.

Friday, February 12, 2021, 16:37: FEBIAD installed with mechanical calibrated leak

Friday, February 12, 2021, 16:38: Roughing.

Gas lines opened all the way to the sour. SV4 and SV5.

Friday, February 12, 2021, 18:47: Turbos on.

Friday, February 12, 2021, 18:55: IG1 on.

Friday, February 12, 2021, 23:22: IG1 @ 1.5E-4 T.  I think the line inside the vacuum chamber is leaking

Friday, February 12, 2021, 23:23: SV5 closed.

Friday, February 12, 2021, 23:24: Vacuum dropping slightly.

Friday, February 12, 2021, 23:24: SV5 opened. IG1 responds to the opening of SV5. The lines from the feedthrough to the calibrated leak need to be re-done.

Tuesday, February 16, 2021, 10:21: IG1 off. Turbos off.

Tuesday, February 16, 2021, 11:21: Venting.

Aaron closed SV4 and the vacuum drop normally. Leak through SV5 as well.

Thursday, February 18, 2021, 15:19: Gas lines roughed and refilled. Gauge reads -50 kPa. Absolute pressure is 50 kPa.

IG1 @ 9.7 e-7 T.

Thursday, February 18, 2021, 15:27: BIAS/EZL/EE @ 30/13/1.5 kV. No sign of instabilities as before. Bias current=0.08 mA.

This also means the leak, in this clean environment is fine.

Thursday, February 18, 2021, 15:28

Slightly drop in flow. Will check later as well.

Thursday, February 18, 2021, 15:37: BIAS/EZL/EE @ 35/13/1.5 kV.

Thursday, February 18, 2021, 15:39. Spark inside. Recover with no problem

Thursday, February 18, 2021, 16:27 : BIAS/EZL/EE @ 40/13/1.5 kV.

Thursday, February 18, 2021, 16:28: Spark

Thursday, February 18, 2021, 16:42:

 Thursday, February 18, 2021, 17:1: Logging water temperature and flow in the PC.

Thursday, February 18, 2021, 17:19: BIAS/EZL/EE @ 0.000 kV.

Thursday, February 18, 2021, 17:20: Auto-ramping TGHT/TBHT to

Thursday, February 18, 2021, 17:26: Anode is shorted. It seems that the  Ta capillary  is touching the HS. I have to open.

Thursday, February 18, 2021, 17:35: IG1 and turbos off.

 Thursday, February 18, 2021, 18:2: Venting

Thursday, February 18, 2021, 18:42: Gauge reader at the service cap is now at -40 kPa. A 10 kPa incursion over 4 hours.

Friday, February 19, 2021, 11:04: The anode still has a short, returning all previous jumpers. Short present.

Unhooked anode cable can sustain voltage, hence the electric circuit has a short,

Friday, February 19, 2021, 11:48: Target removed. No short on anode-target. However there is no short in the service tray either, the voltage from the anode supply is held with no problem.

Friday, February 19, 2021, 12:41: Only when the tbht is bolted the power supply goes current limited.

Friday, February 19, 2021, 12:44: Source tray can hold anode voltage without drawing any current, as expected.

Friday, February 19, 2021, 12:52: Target legs to HS presents a short. When HS is removed the short is gone. Will try to find the contact point.

Friday, February 19, 2021, 12:56: Suspecting that is the gas line that goes to the back of the TGHT; is too high and touches the HS. Putting and insulator and installing the HS cover. No short.

Removing the insulator there is a short.

Will bend the gas line.

Friday, February 19, 2021, 13:08: Installed the open assembly, and the anode voltage is held in the system without drawing current, as expected.

Friday, February 19, 2021, 13:21: TIS assy re-installed, short is fixed.

Friday, February 19, 2021, 13:28: Roughing

Friday, February 19, 2021, 13:43: Power on

Friday, February 19, 2021, 13:59: Turbos on

Friday, February 19, 2021, 14:07: IG1 on.

 Friday, February 19, 2021, 15:06:  Water open. No vacuum response.

Friday, February 19, 2021, 15:06: IG1 @ 3.13e-5 T.

Friday, February 19, 2021, 15:47 :

Friday, February 19, 2021, 15:48: IG1 @ 1.65 e-5 T

Saturday, February 20, 2021, 09:19. IG1 @ 1e-6 T

Saturday, February 20, 2021, 09:20: Auto-ramping TGHT/TBHT to 300,150 A @ 2A/min

Saturday, February 20, 2021, 13:26:  IG1 @ 1.78e-6 T

Saturday, February 20, 2021, 13:29: Anode @ 50 V. Coil @ 20 A. 

Saturday, February 20, 2021, 13:52: Bias voltage only reaches 6 kV, the bias current seems a bit unstable, not  sure now what the problem is.

Saturday, February 20, 2021, 14:58: Auto-cooling TGHT/TBHT to 0 A @ 2 A/min 

Sunday, February 21, 2021, 11:24: Auto-ramping TGHT/TBHT to 580/290A @ 2A/min  

Sunday, February 21, 2021, 16:39: Ramp up complete. IG1 @ 2.15e-6 T. 

Will wait until vacuum is stable to try  to put high voltage.

Sunday, February 21, 2021, 21:51: IG1 @ 2.06e-6 T.  Unable to go above 5 kV.  

Sunday, February 21, 2021, 22:00:  Auto-cooling TGHT/TBHT to 0 A @ 2 A/min 

Monday, February 22, 2021, 09:12: IG1@1.01e-7 T. Bias gets current limited as of 11 kV. The system does not spark so the current is leaking through somewhere.

Monday, February 22, 2021, 09:29: Grounding the TM2 F/T. No effects, same bias issues.

 Monday, February 22, 2021, 11:3: the only way for this instabilities to occur is with a short between ground and HV. No such touch is occurring inside.

Monday, February 22, 2021, 11:37: Instability reacts with punching the cage, that is, shaking up the cage causes the instability to decrease.

Will re-accommodate the cage as it seemed slightly crooked, hence the motivation to punch it.

Monday, February 22, 2021, 14:00: Cage re-accommodated with the help of Aaron. Move a insulating cable that was touching a FT.

Monday, February 22, 2021, 14:30: Now sparks are visible between the coil/HS waterlines and ground waterlines (see pictures attached). I have to open the vacuum chamber.

Monday, February 22, 2021, 14:54: IG1 off. Turbos off.

Monday, February 22, 2021, 15:49: Venting

Monday, February 22, 2021, 16:43: Made clearance between HS/COIL to GND.

Replace 9-pin back to normal grounded setup. Re-salt Ta#62. (Cu Gaskets in-use on FS#5)

Monday, June 21, 2021, 11:30: Roughing chamber.

Monday, June 21, 2021, 11:50: Removed backing window. Roughing beam line side.

Monday, June 21, 2021, 12:01: Multimeters removed. Back HV rack re-grounded. TP6 & TP2 on.

Monday, June 21, 2021, 12:02: TP1B on.

Monday, June 21, 2021, 12:13: TP1A on.

Monday, June 21, 2021, 12:21: IG1 on.

Monday, June 21, 2021, 14:37: Vacuum @ 3.96e-06T. Open FS#5

Monday, June 21, 2021, 14:39: Vacuum @ 3.76e-06T.

Monday, June 21, 2021, 14:42: Power / Sources on.

Monday, June 21, 2021, 14:43; IV4 opened & Optics on

Tuesday, June 22, 2021, 07:40: Quick system check ok.

Tuesday, June 22, 2021, 07:42: Auto-ramping TGHT / TBHT to 300 / 150 A @ 3 A per min.

Tuesday, June 22, 2021, 09:36: TGHT / TBHT @ 300 / 150 A. BIAS / EE / EZL @ 30 / -1.5 / 13 kV.

Tuesday, June 22, 2021, 09:38: Auto-ramping TGHT / TBHT to 580 / 230 A @ 2 A per min.

Tuesday, June 22, 2021, 09:46: External / cage sparks* Multiple.

Tuesday, June 22, 2021, 09:58: Turn down BIAS to 25 kV.

Tuesday, June 22, 2021, 12:45: BIAS to 30 kV.

Tuesday, June 22, 2021, 13:05: Odd. There was activity on FC0 right when the HV was turned on before the 580 ramp up. Now, no activity on FC0, or wire scans. Turning HV down / off.

Tuesday, June 22, 2021, 13:10: BIAS / EE / EZL @ 0 kV.

Tuesday, June 22, 2021, 13:41: Rear cage opened. Digital multi-meter was removed.

Tuesday, June 22, 2021, 13:48: BIAS / EE / EZL @ 30 / -1.5 / 13 kV.

Tuesday, June 22, 2021, 13:57: No beam. Auto-cooling @ 3 A per min.

Tuesday, June 22, 2021, 16:23: HV power off. Optics off. IV4 off. TGHT still cooling.

Wednesday, June 23, 2021, 04:31: IG1 & turbo pumps off. 

Wednesday, June 23, 2021, 06:00: Venting. Power off. FS#5 purged.

Wednesday, June 30, 2021, 19:08: Roughing

Thursday, July 01, 2021, 08:57: Turbos on 

Thursday, July 01, 2021, 09:11: TP1A timed out. Reset it. Waiting for CG1A to drop a bit more. 

Thursday, July 01, 2021, 09:19: TSG:BV1A interlock bypassed so that can be opened. TSGTP1A open

TP1A at speed

Thursday, July 01, 2021, 09:20: Interlock bypassed was removed.

Thursday, July 01, 2021, 09:20: IG1 on. 

Wednesday, July 07, 2021, 08:52 : IgG1 @ 4.64e-7 T.

Wednesday, July 07, 2021, 08:53: Waterlines open. No vacuum response. RGA does not respond, probably the filament burnt out.

Wednesday, July 07, 2021: Gas system has a tiny leak, probably from my initial checks about two weeks ago

Wednesday, July 07, 2021: During adjustments on the gas system the copper pipe yielded a bit and the leak clearly increases. I asked Maico to prepare new VCR connection for replacement (thanks!)

Thursday, July 08, 2021: The gas system inside the Faraday cage is not leaking anymore. However, the gauge inside the service cap does not respond to any pressure changes. It needs replacement.

Friday, July 09, 2021: Gas system troubleshooted with a small nitrogen bottle. Problem was on the two-stage regulator. Tighter connection fixed it.

Power supplies respond normal

Friday, July 09, 2021, 15:19: IV4 open.

Emittance meter power supply on.

Friday, July 09, 2021, 15:22: IG1 @ 4.40e-7 T.

Friday, July 09, 2021, 15:22: Auto-ramping TGHT/TBHT to 300 A / 150A @ 2A/min

Friday, July 09, 2021, 16:06: Emittance meter was not workin. Mike Rowen rebooted the IOC and that fixed the issue.

 Sunday, July 11, 2021, 16:40: IG1 @ 5.13e-7 T.

Sunday, July 11, 2021, 16:42:  Auto-ramping TGHT/TBHT to 550A / 250A @ 2A/min

Sunday, July 11, 2021, 16:43. Anode @ 100 V and  500 mA current limit. 

Monday, July 12, 2021, 09:15: BIAS / EE / EZL @ 30 / -1.5 / 13 kV. - AS

FM

Monday, July 12, 2021, 09:41:  Auto-ramping TGHT/TBHT to 580A / 280A @ 2A/min

There seems to be an issue with the emittance meter. The scans seems to be successful but the plot is only noise.

Tuesday, July 13, 2021, 11:51: Telescope set on the magnet viewport: Grid is fine and I will check it continuosly.

The gauge inside the service cap is working now, as it actually never broke, a manual valve was still close inside the faraday cage.

I measured the voltage sent from the emittance PS, so the emittance meter receives voltage. I think the problem might be the faraday cup, either internally, or with the signal.

Tuesday, July 13, 2021, 15:54: Venting the beamline after the magnet to re-install the mass slit.

HV off

Tuesday, July 13, 2021, 16:19: TMS:BV6 open.

Tuesday, July 13, 2021, 16:21: TMS:BV2 open.

Tuesday, July 13, 2021, 16:27: TMSTP6 and TMSTP2 on.

Tuesday, July 13, 2021, 16:32: TMSIG6 On.

Tuesday, July 13, 2021, 16:40: HV on.

 Wednesday, July 14, 2021: Troubleshooting the emittance meter. I think I saw some indications of beam so it might be that I just need more intensity for a proper measurement.

Moving on, I tested the code as I want to implement a a couple of things: record a bidimensional anode current to make sure I capture any chance with the coil (if any), use temperature estimation from heating power as well.

When running a magnet-anode scan on sodium I triggered the high efficienct regime. This indicates that the cathode is either hotter or closer. With 280 A I am inclined on the latter.

The regime is unstable as the voltage fluctates as well as the ion current. Over a period of two hours

Friday, July 16, 2021, 12:08: Hv off to increase upstream pressure from |200| to |240| kPa, which is the maximum I can achieve with my two-stage regulator.

Friday, July 16, 2021, 12:15: Mass scan.

Friday, July 16, 2021, 13:54: TBHT to 260 @ -2A/min.

 Friday, July 16, 2021, 14:09: HV off.

Friday, July 16, 2021, 14:17: BIAS / EE / EZL @ 30 / -1.5 / 12.5 kV.

Friday, July 16, 2021, 14:17: Mass scan ongoing. Done for the day (on-site)

Saturday, July 17, 2021: Mass scans in both normal and anomalous regime.

Sunday, July 18, 2021, 07:42: Found TSG:CBC in a red state. Using the cfg button on the canbus utilities does not work. Likely the canbus card needs to be replaced.

Monday, July 19, 2021: AS fixed the CBC

Increased anode current limit to 600 mA. More ion current.

Anode voltage setpoint=500 A, anode voltage readback=250 V.

Moving the setpoint to 250 causes no effect. But when moving the setpoint to 245 V, the ion current, and the drain current decrease.

Putting together previous findings to discuss what to do next.

Grid still fine.

Tuesday, July 20, 2021, 17:22:   TBHT to 240 @ -2A/min.

Around 16:30 there was a slight target voltage drop. This coincided with the anode getting current limited (500mA) at 100V.

 Tuesday, July 20, 2021, 17:47:  IG1 reacts to the "sparks" observed on the anode leackage current.

Lowering the anode voltage to 0 V. I'll go on-site tomorrow to check the state of the grid and to check if there are visible sparks inside the chamber.

Wednesday, July 21, 2021, 12:40: entries from early today lost I'll try to summarize what has happened:

grid still fine

Manually sweeping the anode but no visual of any kind inside the vacuum. IG1 still reacts to sudden increase of leakage current but nothing observed inside the vacuum chamber.

 anode leakage current responds to decreasing the target heating current when lowering to 235A.

When going to 200 A, the anode leakage current drop to 0 mA when the cathode reached 211.

Now the cathode gets current limited as of 1 V.

grid still fine.

Wednesday, July 21, 2021, 12:44: TGHT/TBHT to 0 A @ -2A/min 

 Wednesday, July 21, 2021, 14:43: TBHT @ 0 A, TGHT @ 340 A. Setting the anode voltage to 500 V has a leakage current of 102.5 mA.

Wednesday, July 21, 2021, 22:19: IV4 closed

 Wednesday, July 21, 2021, 22:21:  BIAS / EE / EZL @ 0.000 kV.

Wednesday, July 21, 2021, 22:22:  IG1 off. Turbos off.

Thursday, July 22, 2021, 10:44: Venting:

 Thursday, July 22, 2021, 17:43: Roughing

New argon gas bottle installed.

Thursday, July 22, 2021, 18:16: Turbos on.

Thursday, July 22, 2021, 18:25: TP1A  timed out. TSG:CG1A is larger than TSG:CG1, that is the roughing lines are higher than the vacuum chamber. 

Thursday, July 22, 2021, 18:27: Bypassing TSG:BV1 to open it.

Thursday, July 22, 2021, 18:28: Turbo at speed.

Thursday, July 22, 2021, 18:28: Bypass removed.

Thursday, July 22, 2021, 18:28: IG1 on. 

Friday, July 23, 2021, 09:16: IG1 @ 1.69e-6 T.

Friday, July 23, 2021, 09:17: Waterlines open. No vacuum response

Friday, July 23, 2021, 10:09: While checking the gas connections I found out that inside the faraday cage there are a couple of connections missing:

Coil PS chasis ground disconnected

Resistor between  A and C (tbht pos and tght neg) disconnected.

Friday, July 23, 2021, 15:29: Gas system taken out to properly install a new "tee" union.

Friday, July 23, 2021, 15:29: IG1 @ 1.34e-6 T.

Friday, July 23, 2021, 15:52: Power/ sources on.

Friday, July 23, 2021, 15:54: Auto-ramping TGHT/TBHT to 580 A/ 280 A @ 2A/min

Friday, July 23, 2021, 15:58: IV4 open.

Saturday, July 24, 2021, 13:07: IG1 @ 1.25 e-6 T. 

Saturday, July 24, 2021, 18:34: BIAS / EE / EZL @ 30 / -1.5 / 13 kV. One spark when Bias reached 30 kV.

Saturday, July 24, 2021, 18:36: Two consecutive sparks. Lowering to bias  29.5  kV to let it conditioned there for at least 10 minutes.

Saturday, July 24, 2021, 18:46: Bias to 30 kV. No sparks. 

Saturday, July 24, 2021, 18:59. No sparks. IG1 @ 1.16e-6 

Saturday, July 24, 2021, 19:26: Anode gets current limited  as of 2 V. Maybe there is a short somewhere else either inside the vacuum box, or on the service cap. Will check tomorrow

Saturday, July 24, 2021, 19:30: BIAS / EE / EZL @ 0 kV.

Saturday, July 24, 2021, 19:30: Auto-cooling to 0 A @ -2A/min

Monday, July 26, 2021, 09:00: IG1 @ 4.58e-7 T.

Monday, July 26, 2021, 09:17: No visible sparks 

Monday, July 26, 2021, 09:22: Power sources off. 

Monday, July 26, 2021, 13:20: After some tests I can conclude a couple of things:

• Anode/Cathode voltage power supply works fine and draws the right current for a 100 kOhm resistor. 
• When all cables are disconnected from TBHT and TGHT F/Ts there is continuity between them and HV common.

Monday, July 26, 2021, 14:52: IV4 closed

Monday, July 26, 2021, 14:53: Turbos off.

Oops!, forgot to turned off IG1 but interlock did it for me :p

 Monday, July 26, 2021, 17:19: After opening the vaccum chamber I found the portion of the capillary that goes to the target was touching the heatshield. Confirmed continuity with a multimeter.

Manually move it away and no continuity confirmed with multimeter.

FTs A-D recconected.

Bypassing anode interlock to check there is no short. Confirmed.

Preparing to close and pump.

 Monday, July 26, 2021, 17:23: Roughing

Monday, July 26, 2021, 17:55: Turbos on.

Monday, July 26, 2021, 18:03 : TP1A timed out ...again

Monday, July 26, 2021, 18:03: Bypassing BV1A. TP1A reset and on. turbos at speed.

 Monday, July 26, 2021, 18:05: IG1 on.

Monday, July 26, 2021, 18:26: IG1 @ 1.97e-5 T. 

Monday, July 26, 2021, 22:33: IG1 @ 2.41e-6 T

Monday, July 26, 2021, 22:33: IV4 open. 

Monday, July 26, 2021, 22:55: BIAS/EZL/EE to 10/6/1 kV. No problem. All set to 0.000 kV again 

Monday, July 26, 2021, 22:57: Coil to 10 A. Anode to 100 V.. No problem. All set to 0 again.

 Monday, July 26, 2021, 22:59: Auto-ramping TGHT/TBHT to 580/280 A @ 2A/min.

Tuesday, July 27, 2021, 06:32: IG1 @ 1.52e-6 T.

At 01:30, approximately 10 minutes after TBHT heater reached the desired current, the anode went from 0 to 1.5 V.

Tried to put anode voltage to 100 V but it got current limited as of 2 V.

Given that before heating the anode voltage was fine, I think the gas tube move again and made contact with the heatshield.

I will need to open this again :(

 Tuesday, July 27, 2021, 06:41: Auto-cooling TGHT/TBHT to 0 A @ -4A/min

Tuesday, July 27, 2021, 09:08: Heaters @ 0 A. Anode still gets current limited.

Tuesday, July 27, 2021, 09:09: IV4 close. Timed out. 

 Tuesday, July 27, 2021, 09:09: IG1 off.

Tuesday, July 27, 2021, 09:09: Turbos off. 

Tuesday, July 27, 2021, 11:13: Venting.

Tuesday, July 27, 2021, 11:58: Gas tube move and end up touching the  heatshield again. When try to adjust it to add an insulator as an spacer, the gas line de-coupled from the target.

removing the target for re-installation and clearance addition.

 Replace Ta capillary going into the target with the one from previous febiad as it felt sturdy and had better shape for clearance with the HS.