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 

Friday, December 20, 2024, 09:37    turned off all 4 turbopumps. winding down prior to evacuating.

Friday, December 20, 2024, 11:43 Purged and closed all water cooling lines.

Friday, December 20, 2024, 15:54   removed target and installed Uline.

 roughing down test stand 

Friday, December 20, 2024, 16:17    valves closed and roughing pump off. 

Friday, December 20, 2024, 16:17   shut down test stand computer for holiday break 

 Note, ground and HVC (high voltage common) are used interchangeably here.

Monday, December 16, 2024,   in the previous test, elog 1038, it was found that the cathode was unable to hold any voltage and was shorted to HVC. The cathode was shorted directly to ground, with the cathode supply current limiting upon being powered, unable to reach even 1V.

After testing, the ANODE power supply stopped functioning and was unable to provide and voltage or current.

When the target was removed, it was found that the TBHT terminal was just ~100Ω from HVC. When I shorted the TGHT to TBHT terminal, as they are when the target is installed, the resistance from TBHT to HVC dropped to just 1Ω. Prior to the anode power supply stopping, it was found that when it was powered on with no target present, it was able to hold voltage, but still drew significant current: up to 400mA when provided less that 20V. This should be completely open, losing no current at all.

Keiko and the controls team have been looped in to address the issue with the ANODE power supply as it may be a controls issue. They believe there are a few possibilities for its error that must be investigated prior to deferring to the power supplies group. This will continue to be investigated

    ********** UPDATE: ISSUE RESOLVED ********* There is simply a physically triggered interlock that requires the faraday cage door to be closed to operate the ANODE power supply

When investigating the resistive short from the TBHT, I first noted the resistances between each of the channels: TGHT(-) to TGHT(+) 30↨Ω; TBHT(-) to TBHT(+) 20Ω; TBHT(-) to TGHT(-) 100Ω; TBHT(+) to TGHT(+) 140Ω. I also reconfirmed and noted relevant connections at the feedthroughs: There are NO visible shorts to HVC from the TGHT or TBHT feedthroughs. From TGHT(-), there is one 50kΩ resistor with varistor, between TGHT(-) and TGHT(+) there is a100Ω with varistor. I then removed the back of the faraday cage to investigate possible paths to ground from the TGHT and/or TBHT. This showed that TGHT- was grounded through a varistor (checked, functioning correctly, OL at low voltage), TGHT- to + has varistor||100Ω, TBHT- to + has varistor||100Ω, and TBHT- to TGHT- has varistor||100Ω. These fit in accordance with the observed resistances between the terminals.  

I also disconnected the ANODE power supply from its output wire to further investigate without possible issues from the power supply. At this point, (after I had remade the varistor connections) I began to observe that the TGHT and TBHT terminals were all detached from ground by 50kΩ (expected amount, given that there is a 100k||100k resistor from TBHT- feedthrough to ground). When I reattached the anode power supply, that value dropped to 35kΩ, I assume due to internal resistance of the power supply. I placed everything back in position and (repeatedly) ensured that the 35kΩ separation persisted. It seems that this shorting issue has resolved itself. It may be that the was an accidental connection made from an unshielded wire inside the faraday cage.

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, December 10, 2024, 14:38 Depressurized ATTS using argon, switched out samples, and repressurized ATTS. Heated new sample to 1000 degrees Celsius.

  Friday, December 06, 2024, 16:03 Heated and cooled a sample in the ATTS 3x

Tuesday, December 02, 2024, 15:35    - Target loaded into the test stand

Thursday, December 03, 2024, 14:33 - as per elog entry 1033, test stand has been changed to CATHODE mode, and wiring within the Faraday cage has been altered appropriately. Additionally, a GeMov resistor has been added to potentially reduce the sparking problems that have previously tripped the TGHT power supply

Thursday, December 04, 2024, 10:00    - Roughing pump having trouble reaching suitable vacuum - possible replacement required.

Thursday, December 05, 2024, 13:37  - Turbo pumps on

Wednesday, December 11, 2024, 15:02   dropped bias/ee/ezl to 0

Wednesday, December 11, 2024, 15:02    Must cool target to investigate Cathode short. Prior to installation, target isolation was confirmed. If the cathode dropped to contact the copper plate shielding the coil, this would be evidence to support keeping the retainer.

Thursday, December 12, 2024, 09:24   after cooling, cathode power supply was checked to see if shorted and it is indeed still shorted out.

 Thursday, December 12, 2024, 09:25   turning off turbo pumps to spin down 

Thursday, December 12, 2024, 11:30:     venting chamber  

 Friday December 13:   after venting the chamber and removing the target. The target appears to be unshorted and intact. However, upon inspection of the test stand, there appears to be a ~100Ω load between the cathode and ground. This load is able to sustain voltage from the cathode power supply, but draws a significant amount of current. It is too much for operation, and might be further aggravated by the presence of the target. Further, when the TGHT and TBHT terminals are shorted together, the resistance from cathode to ground drops to ~1Ω. Perhaps this could be associated with the installation of the TGHT power supply, as FEBIAD has not been run on this machine since it was installed.   Wiring at the feedthroughs as been quadruple checked, I don't believe that the problem lies there.

With no target in place, the cathode was able to hold a voltage, despite drawing 100+mA current. However, I was unable to repeat further tests, as the power supply stopped responding. Despite ramping up to ~10V in epics, the readback is 0V/0A, unlike before.

 Thursday, December 05, 2024, 14:05 Pressurized ATTS with argon, swapped out samples, and repressurized and heated chamber.

 Thursday, December 05, 2024, 11:04: RP1 was struggling to pump down. RP SN: MY20055A02 removed. Tip seal replacement likely req'd.

Swapped with a new roughing pump SN: MY2340SA06 (Voltage set to 115V. Shipping locks loosened prior to install)

Ballast filter installed.

Thursday, December 05, 2024, 11:05: Roughing.

Thursday, December 05, 2024, 11:10: Vacuum pressure dropping optimally. Down below 1T already

Thursday, December 05, 2024, 11:47: TP & other RP ok. Note TP1A is getting louder on startup. Will likely need a change out in Q1 - 2025.

Additional source tray inspection:

Monday, December 16, 2024, 15:30: OK

Images attached.

  Wednesday, December 04, 2024, 15:42 Depressurized the ATTS

  Tuesday, December 03, 2024, 15:48

Switched out pellets in ATTS, brought pressures down to ~10 uTorr, heated and cooled sample.

Tuesday, December 03, 2024, 14:55  ANODE/CATHODE power supply switched to cathode mode, NEGATIVE

 November 28, 2024 1:46PM

Checked in on sample in ATTS.

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.

 Tuesday, November 19, 2024, 14:25: Roughing

Gas line is attached. 

Wednesday, November 13, 2024, 14:18: Roughing.

Wednesday, November 13, 2024, 18:20: Closed backing valves. Vacuum @ 2.140 T? 

Thursday, November 14, 2024, 06:23: Venting manually.  

Thursday, November 14, 2024, 06:50: Left line slightly un-seated. Swapped out waterline gaskets. Close. Roughing.

Thursday, November 14, 2024, 07:22: TP1B on. 

Thursday, November 14, 2024, 07:33: Backing pressure below 0.100T. TP1A on. 

Thursday, November 14, 2024, 07:43: TP1A Tripped. Backing pressure @ 0.067T.

Thursday, November 14, 2024, 07:47: TP1B off to bring backing pressure below 0.050T. 

Thursday, November 14, 2024, 07:56: Re-opened & Restarted TP1B

Thursday, November 14, 2024, 08:38: Re-closed. Will have to allow TP to spin down before opening the vent valve to give the interlock a reset. (We should remove that or have a bypass in the future)

Thursday, November 14, 2024, 08:46: Coordinated opening BV1A & BV1B simultaneously from 2 computers to bypass the interlock. Success. TP1B. On & green. TP1A started.  

Thursday, November 14, 2024, 08:52: TP1A at speed (Green) Teamwork makes the dream work!!! IG1 on.

Thursday, November 14, 2024, 13:41: Vacuum @ 1.10e-06T. Waterline FS#5 open. Vacuum ok.

Thursday, November 14, 2024, 13:43: Power / Sources on. 

Thursday, November 14, 2024, 13:46: Checks. TGHT / TBHT to 5/5A. BIAS / EE / EZL to 1 / -0.5 / 1 kV. OK. Tap back down. Allow vacuum to drop further. Ready for operation. 

Thursday, November 14, 2024, 13:48: Open IV4. Timed out. Tighten sensor. Reset. Open IV4. 

Friday, November 15, 2024, 05:25: Vacuum @ 4.23e-07T. Auto-ramping TGHT / TBHT to 350 / 150 A @ 2 A per min. 

Friday, November 15, 2024, 09:01: Vacuum @ 6.01e-07T. Auto-ramping TGHT / TBHT to 580 / 230 A @ 2 A per min. 

Friday, November 15, 2024, 11:46: Optics on. 

Friday, November 15, 2024, 11:54: TGHT tripped completely off & was unable to restart while turning up the HV. Was at 580 A. BIAS / EE / EZL was tapped up to near 27.5 / -1.5 / 13 kV.

Friday, November 15, 2024, 12:05: Verified nothing appears to have burnt up or similar. Unable to begin auto-cooling on TBHT as it requires both heater PS to operate. Will tap down TBHT manually. TGHT is set @ 0A.

Friday, November 15, 2024, 12:11: TBHT tapped down to 0A. 

Friday, November 15, 2024, 12:14: Once at 0 A, the TGHT PS status turned from red to black??? Was able to reset & turn it back on. Brought it up to 5 A. That's different. 

Friday, November 15, 2024, 12:23: Sources PS off. Will re-ramp on Monday.

Monday, November 18, 2024, 07:24: Vacuum @ 2.43e-07T. Auto-ramping TGHT / TBHT to 350 / 150 A @ 4 A per min. 

Monday, November 18, 2024, 09:17: Vacuum @ 2.69e-07T. Auto-ramping TGHT / TBHT to 580 / 230 A @ 2 A per min. 

Monday, November 18, 2024, 13:02: Sources / Optics On.

Monday, November 18, 2024, 13:08: BIAS / EE / EZL to 20 / -1.5 / 13 kV.

Monday, November 18, 2024, 13:10: BIAS / EE / EZL to 27 / -1.5 / 13 kV. 

Monday, November 18, 2024, 13:20: TGHT Shut off again during a mass scan!

Monday, November 18, 2024, 13:22: Restarted TGHT. This is problematic. TGHT @ 580A. 

Monday, November 18, 2024, 13:25: Redo mass scan. 

Monday, November 18, 2024, 13:59: Mass / wire scans complete. HV to 0 kV. 

Monday, November 18, 2024, 14:00: Auto-cooling @ 2 A per min.

Tuesday, November 19, 2024, 10:04: IV4 closed

Tuesday, November 19, 2024, 10:06: Sources off.

Tuesday, November 19, 2024, 10:07: IG1 & TP off. 

Tuesday, November 19, 2024, 11:16: Power off / lockout. FS#5 purged. Venting. 

42972-5 Base / 42972-9 Lid

Tuesday, November 05, 2024, 16:30: Roughing. 

Tuesday, November 05, 2024, 17:04: TP1B on.

Tuesday, November 05, 2024, 17:13: TP1A on.

Tuesday, November 05, 2024, 17:21: IG1 on @ 2.41e-05T 

Wednesday, November 06, 2024, 10:35: Vacuum @ 5.75e-07T. Waterline FS#5 open. 

Wednesday, November 06, 2024, 16:24: TGHT/TBHT ramping to 580/230A at 2A/min

Thursday, November 07, 2024, 09:16:  Increasing BIAS/EE/EZL to 30/2.5/13 kV slowly

Thursday, November 07, 2024, 11:26:  as expected, no beam out to FC0. slowly increasing to bias to 45kV alongside ezl to 28kV

Thursday, November 07, 2024, 11:27:   TGHT dropped out for 1s. Did not register a trip or anything. simply jumped down to 0A and immediately recovered.

Thursday, November 07, 2024, 14:40:   At 45kV, there were no sparks noticed. The target assembly was brought down to 0V and ramped down to 0A/0A at -2A/min  

Wednesday, November 13, 2024, 09:15: PS Off. TP off - AS. 

Wednesday, November 13, 2024, 11:26: VV1 opened - BB. 

 Thursday, October 31, 2024, 13:53: Roughing down empty chamber. U-Line installed.

Monday, November 04, 2024, 11:40: Vent beamline. 

Monday, November 04, 2024, 13:40: 1/2 operating filament spare provided & installed. Roughing beamline section.

Monday, November 04, 2024, 13:51: TMS:TP2 on. 

Monday, November 04, 2024, 13:57: TMS:TP6 on. TMS:IG6 on.

Tuesday, November 05, 2024, 15:00: Venting Chamber

Tuesday, November 05, 2024, 15:19: IG6 still displaying issues. Contacted Edi, 

Tuesday, November 05, 2024, 15:35: Controller replaced. Switch to Filament 2. IG6 on. Reading 3.73e-07T. 

Wednesday, November 13, 2024, 09:16: IG6 is tripped again. 

Wednesday, November 13, 2024, 09:17: Reset & switched back to Filament 2. There is no filament 1. Reading 3.91e-07T.

 42972-6 Base / 39956-1 Lid

Tuesday, October 29, 2024, 18:20: Roughing. 

Tuesday, October 29, 2024, 18:52: TP1B on. 

Tuesday, October 29, 2024, 18:58: TP1A on.

Tuesday, October 29, 2024, 19:06: IG1 on.

Wednesday, October 30, 2024, 07:23: Vacuum @ 8.25e-07T. Waterline FS#5 open.

Wednesday, October 30, 2024, 07:25: Power on.

Wednesday, October 30, 2024, 07:32: PS for TGHT keeps timing out? Goes red. Won't start. 

Tapped up TBHT to 10 A. TGHT?

Wednesday, October 30, 2024, 08:20: Manually cycled the PS. No longer trips.

Tapped up TGHT to 5 A. OK

Wednesday, October 30, 2024, 08:26: Auto-ramping TGHT / TBHT to 580 / 230 A @ 2 A per min.

Wednesday, October 30, 2024, 14:32: Auto-cooling @ 2 A per min.

Thursday, October 31, 2024, 08:30: TP/ IG1 off. 

Thursday, October 31, 2024, 12:52: Venting. 

Wednesday, October 09, 2024, 11:28   Target loaded, remote power supply added for mass marker, negative channel on pin 5, positive channel on pin 7.

Wednesday, October 09, 2024, 11:50   roughing

 Wednesday, October 09, 2024, 12:51   Turbo pumps TP1A TP1B on

 Thursday, October 10, 2024, 09:27:   Water cooling turned on. no effect on vacuum (2.6e-6T)

Thursday, October 10, 2024, 09:45:   Increasing TGHT TBHT to 150/150A at 1A/30s

Thursday, October 10, 2024, 11:07    TGHT TBHT at 120/120A  .   increasing TGHT TBHT to 580/230 at 1A/10s 

Thursday, October 10, 2024, 12:29   during the current increase, when TBHT was at 230 and TGHT reached ~460, the TBHT current began decreasing. Upon inspection, the TBHT voltage is higher than normal and hitting its limit. It may be that there is another current path. that is, it may be shorted. 

as TGHT increases, TBHT voltage continues to increase.   TGHT voltage is similarly higher than usual, at 6V to deliver 500A.

on another note, the vacuum value has been increasing slowly throughout heating, possibly due to the presence of indium within the mass marker reservoir, or simply because this target has not been hot for some time. Leaving TGHT at 502A for the time being.

Thursday, October 10, 2024, 13:34    Increasing BIAS/EE/EZL to 30/2.5/13 kV. 

Thursday, October 10, 2024, 14:27  beginning mass scan - reservoir at 0 A. (reservoir contains solid Indium)    - mass scan res In 0A

 Thursday, October 10, 2024, 15:19   increased current through reservoir with magnet sitting at mass 115 - noticeable increase in Indium presence in beam beginning at ~2.5A. Brought res current to 3.0A, waited for FC6 current to plateau.- at 5e-10A

Thursday, October 10, 2024, 15:27   mass scan run again

Thursday, October 10, 2024, 15:57   res current decreased to 0A

Thursday, October 10, 2024, 15:57  dropping voltages to 0V 

Thursday, October 10, 2024, 16:12  voltages at 0, decreasing TGHT TBHT at 1A/30s