Tuesday, December 12, 2023, 16:07  - Pumping down test stand overnight for testing tomorrow. vacuum good, turbos starting now. Four thermocouples attached inside. tc1: high on (+) TGHT leg, pins 1+2. tc2: at target terminal (+), pins 4+5. tc3: at target terminal (-), pins 6+7. tc4: low on (+) TGHT leg, pins 8+9.

 Wednesday, December 13, 2023, 09:32 : Vacuum at 8.2e-7 T.  Electrical team is finishing connecting the cables. Claim it will be complete at 11am.

 Wednesday, December 13, 2023, 11:41Started both tc loggers at 11:40 - important for offset time. Beginning ramp as well on ATTS TGHT. set vacuum values high at 1e3 1e4 to bypass ATTS interlock, which does not apply here. ramping to 600A with step increment 10A and wait interval 10s.

    ATTS TGHT claims ramping in progress, but increased voltage is reported only on the autoramp window, which reports increasing the target amperage by 10A each 10s. However, no increased voltage reading is reported there, nor is there any increased current. ATTS:TGHT:RDCUR and ATTS:TGHT:RDVOL are ~0 as well. No increased temperature on any of 6 tc channels.

Wednesday, December 13, 2023, 11:57 ATTS TGHT power supplies appear to be under local control. It also appears (low current right now) that the value reported in EPICS is 1/3 of the value reported on the master power supply. It may be that the epics value is per output of the individual 3 supplies, while the total output is reported on the PS display. Planning to now increase to 300A and reach steady state.

Wednesday, December 13, 2023, 12:13 : 1/3 ratio idea confirmed at 33A EPICS reading / 100A master reading and again at 100A EPICS reading / 300A master reading. 300A now reached. Waiting for 20min. Temps inside ~ 21°C. Temps on feed through terminals ~22°C

 Wednesday, December 13, 2023, 12:26:  200epics 600A master. tc out: 23.0, 22.6. tc in: 21.4 21.7 22.0 20.8.  waiting

Wednesday, December 13, 2023, 12:36  No temp change over 10 min. increasing to 900A

 Wednesday, December 13, 2023, 12:47: 900A. outside tc 24.5 23.7°C. inside tc 21.7 23 23.6 21.0 °C.

Wednesday, December 13, 2023, 13:04: increasing to 1200A

Wednesday, December 13, 2023, 13:11  1200A. outside tc 27.1 25.4. inside tc 22.6 24.8 25.9 21.7 °C. Will wait to observe stability

Wednesday, December 13, 2023, 13:20 after ~10min. outsideTC: 27.6 25.9. insideTC: 22.5 25.2 26.1 21.8 °C.  Temperatures appear stable. increasing to 1300A

 Wednesday, December 13, 2023, 13:25   at 1300A. outsideTC: 28.3 26.5, insideTC: 22.8 25.7 26.8 21.8.   waiting for stability

 Wednesday, December 13, 2023, 13:38 after ~10min, outsideTC 29.1 27.1, insideTC 23.2, 26.2, 27.4, 21.9.  stable. Increasing to 1400A

 Wednesday, December 13, 2023, 13:41:   1400A. outsideTC 29.8, 27.6. insideTC 23.4 26.7 28.2 21.4

Wednesday, December 13, 2023, 13:50     temps look stable 30.1 27.9,     23.3 27.7 28.4 21.4 .    going to increase to 1500A   ---- turning off turbo pumps in case of failure at high current

 Wednesday, December 13, 2023, 13:57    at 1500A. temps:   30.9 28.3.  23.6 27.2 28.9 21.8 .

 Wednesday, December 13, 2023, 14:07  temps look stable:   31.5 28.8...   23.6 28.0 29.4 22.0     going to increase to 1600A

 Wednesday, December 13, 2023, 14:10    at 1600A     temps:  32.0 29.1..... 23.8 28.2 30.0 22.2

 Wednesday, December 13, 2023, 14:20   temps stable: 32.8 29.7,    23.9 28.9 30.6 22.2,.  increasing to 1700A

 Wednesday, December 13, 2023, 14:24 at 1700A    temps:  33.5 30.2       24.3 29.3 31.5 22.4

 Wednesday, December 13, 2023, 14:35  temps stable :   34.2 31.0       24.3 30.0 32.0 22.6 increasing to 1800A

Wednesday, December 13, 2023, 14:38  at 1800A. temps:    35.0 31.3      24.6 30.3 32.7 22.8

 Wednesday, December 13, 2023, 14:47  temps:   35.8 32.0      24.7 31.2 33.3 22.8

 Wednesday, December 13, 2023, 14:58   temps stable. 36.0 32.2    24.7 31.2 33.3 23.1       turning down power supply

 Wednesday, December 13, 2023, 15:23 power supply off. strip tool data dumped to test1.txt --- copy this elsewhere. TCs left to continue monitoring for any additional cooldown.

Wednesday, December 13, 2023, 16:13    tc recording stopped.

repeat test

Thursday, December 14, 2023, 15:18    tcs start time

Thursday, December 14, 2023, 15:20  increasing TGHT from ATTS directly to 1500A and waiting for steady state temperature. Aiming for similar ramp rate to previous ~1A/s, 60A/min.   tcs at cold read 21.9 21.9... 21.1 20.9 20.9 20.7

 Thursday, December 14, 2023, 15:39  at 1500A

Thursday, December 14, 2023, 15:50   after~10min, temps at 31.3 28.4... 23.6 27.6 29.1 22.3

 Thursday, December 14, 2023, 15:59 after ~20min, temps at 31.5 28.6.... 23.5 27.5 28.8 22.5.    stable.  increasing to 1800A

 Thursday, December 14, 2023, 16:03  at 1800A 

Thursday, December 14, 2023, 16:14   after 10min - 35.8 31.8      24.7 30.8 32.6 23.1

 Thursday, December 14, 2023, 16:25  after 20min - 36.3 32.2     24.7 30.9 32.6 23.4    stable.   decreasing current.

Thursday, December 14, 2023, 16:42    0A... cooling for a while

 Thursday, December 14, 2023, 16:56  22.8 22.8    21.1 21.0 21.2 20.8

Tuesday, February 20, 2024, 14:20: TS to wired to Cathode BIAS mode as per ISK4563D.

Monday, March 11, 2024, 13:59: Power supply polarity switched to negative.

 Thursday, March 14, 2024, 15:39: Roughing

Thursday, March 14, 2024, 16:20:TP1B on

Thursday, March 14, 2024, 16:40: TP1A on

Thursday, March 14, 2024, 16:51: IG1 on

Thursday, March 14, 2024, 17:28: Waterline FS#5 open

 Friday, March 15, 2024, 13:19:  Gradually increased BIAS to 25kV, then up to 50kV more slowly. Accompanied by increase in EZL voltage.

Friday, March 15, 2024, 13:50: Periodically increased BIAS voltage in 100V increments watching for sparks. Decrease BIAS whenever sparks. settled at 51.5 kV (cannot increase further without sparking), left at high voltage.

Friday, March 15, 2024, 15:48: Decreasing BIAS to 10kV 

Friday, March 15, 2024, 16:28: ran coil at 80A until vacuum recovered. 

Friday, March 15, 2024, 19:29: decrease coil to 0A, decrease BIAS to 0V

Monday, March 18, 2024, 10:08 increasing TGHT/TBHT to 440A/290A at 1A/30s

Monday, March 18, 2024, 16:00  increasing COIL to 40A, waiting for vacuum to return to normal 

Monday, March 18, 2024, 21:05:  decreasing COIL to 0A

Tuesday, March 19, 2024, 09:35: increased COIL to 40A.

Tuesday, March 19, 2024, 10:17: increased TDH:ANODE (cathode mode) to (-)200V

 Tuesday, March 19, 2024, 10:20: increasing BIAS to 30kV

Tuesday, March 19, 2024, 13:12:  turned on gas. vacuum jumped up and tripped everything off.  gas was immediately turned back off. TGHT and TBHT were off for approximately 1 minute before being turned back on.

Tuesday, March 19, 2024, 13:46:   cooling. need to investigate possible leaks. 

Tuesday, March 19, 2024, 15:58: TGHT and TBHT at 0A. Turbo pumps turned off. waiting to slow before venting.

 Tuesday, March 19, 2024, 16:20 venting

Wednesday, March 20, 2024, 14:47: Target assembly was removed today and the tube from the inlet to the calibrated leak was replaced. Now reinstalled, roughing. Gas was turned on at ~0.2 bar during roughing. No effect on vacuum.

           water cooling also turned on.

Wednesday, March 20, 2024, 14:53 Turbo pumps turned on.

Wednesday, March 20, 2024, 20:24: begin ramping TGHT TBHT to 440/290A at 1A/30s

Thursday, March 21, 2024, 09:54:    Target heated, vacuum good.   Tested gas to ensure there is no noticeable effect on vacuum. Lines subsequently vented through the line roughing pump.

Thursday, March 21, 2024, 09:55    Optics switched on. increasing cathode to 200V and coil to 40A. Watching vacuum, checking beam tune 

Thursday, March 21, 2024, 10:20   ramping BIAS to 30kV 

 Thursday, March 21, 2024, 11:14 : scanned, data recorded

Thursday, March 21, 2024, 11:14  cathode reduced to 100V. scanned 

Thursday, March 21, 2024, 11:32:  coil reduced to 20A. scanned. 

Thursday, March 21, 2024, 11:50  cathode increased to 200V. scanned 

Thursday, March 21, 2024, 12:07 coil increased to 40A.  Argon gas on (-0.8bar at regulator). scanned 

Thursday, March 21, 2024, 12:31  reducing bias to 0kV 

Thursday, March 21, 2024, 13:02 argon regulator pressure increased to -.64bar

Thursday, March 21, 2024, 13:05 increasing bias to 30kV

Thursday, March 21, 2024, 13:15:  vented lines, scanning

 Thursday, March 21, 2024, 13:35 gas on. scanning

 Thursday, March 21, 2024, 15:05 cathode at 100V, scanning

Thursday, March 21, 2024, 15:20 coil at 20A, scanning

 Thursday, March 21, 2024, 15:55 coil off. scanning

Thursday, March 21, 2024, 16:10 cathode off, scanning

 Thursday, March 21, 2024, 17:23  - bias down. changing gas pressure

Friday, March 22, 2024, 09:08   increasing bias, checking tune,  increasing cathode to 200V, coil to 40A, EZL to 13kV

Friday, March 22, 2024, 09:48  gas vented, scanned, gas on, scanned.

Friday, March 22, 2024, 09:48  decreasing bias to 0V, changing gas pressure.

Friday, March 22, 2024, 10:12 pressure at 1bar.abs.  increased bias to 30kV, checked beam tune, cathode to 200V, coil to 40A, EZL to 13kV

Friday, March 22, 2024, 10:13   gas on. scanning 

Friday, March 22, 2024, 10:33   decrease bias, changing pressure. 

Friday, March 22, 2024, 10:57 gas line pressure at 1.5bar.a.   increasing bias to 30kV, checking beam tune, cathode to 200V, coil to 40A, EZL to 13kV

Friday, March 22, 2024, 11:42 decreased bias, changing pressure.

Friday, March 22, 2024, 11:52 gas line pressure at ~2bar.a  increasing bias to 30kV, checking beam tune, cathode to 200V, coil to 40A, EZL to 13kV

Friday, March 22, 2024, 15:40  bias down to 0V. reducing TGHT TBHT to 0/0

 Monday, March 25, 2024, 09:30 Turbo pumps turned off

 Monday, March 25, 2024, 10:00 venting chamber, purged water lines.

 Monday, March 25, 2024,11:00 removed target assembly

 Monday, March 25, 2024,13:00 replaced target assembly, began roughing

 Monday, March 25, 2024,13:50: turned on water cooling. Vacuum stable. Turned on turbo pumps.

 Monday, March 25, 2024, 15:16   turned on optics elements, cathode to 200V, coil to 80A, EZL to 13kV. monitoring vacuum. Gas leak test shows no effect on vacuum (5e-6T).

Monday, March 25, 2024, 15:22: Ramping TGHT TBHT to 440/290A at 1A/30s

 Tuesday, March 26, 2024, 10:32 Ran mass scans with gas off and on. 

Tuesday, March 26, 2024, 10:32 scanning parameter space for optimal beam output - cathode voltage and coil current.

 Tuesday, March 26, 2024, 15:29 ramping TBHT to 300A, scanning

 Tuesday, March 26, 2024, 16:10 ramping TBHT to 310A, scanning

 Tuesday, March 26, 2024, 16:40 ramping TBHT to 320A, scanning

 Wednesday, March 27, 2024, 09:25 - ramping bias to 30kV

Wednesday, March 27, 2024, 09:40 scanning cathode / coil parameter space to optimize output --- highest output at 200V 60A - 200V 62A - magnet drifted and is not right at Ar peak. corrected. scan repeated

Wednesday, March 27, 2024, 10:31 scanning cathode / coil parameter space to optimize output 

Wednesday, March 27, 2024, 11:02   mass scan with 200V 62A cathode coil.

Wednesday, March 27, 2024, 11:17 - lines evacuated. mass scan.

 Wednesday, March 27, 2024, 11:40 bias to 0V.  change gas pressure

 Wednesday, March 27, 2024, 11:50 bias to 30kV.  mass scan

 Wednesday, March 27, 2024, 12:10 bias to 0V.  change gas pressure

 Wednesday, March 27, 2024, 12:21 bias to 30kV.  mass scan

 Wednesday, March 27, 2024, 12:31 bias to 0V.  change gas pressure

 Wednesday, March 27, 2024, 12:43 Ramping bias to 30kV. 

Wednesday, March 27, 2024, 15:00 bias to 0V. changing pressure to .5 bar.

Wednesday, March 27, 2024, 15:13 bias at 30kV.  

Wednesday, March 27, 2024, 15:13 increasing TGHT to 468A (~2250W) - mass scan - monitoring vacuum. stable at 6e-7T

Wednesday, March 27, 2024, 15:39 increasing TGHT to 490A (~2500W) - mass scan - monitoring vacuum. stable at 6e-7T

Wednesday, March 27, 2024, 16:23 reduced cathode voltage to 50V to record the electron current (17.09mA). mass scan taken with coil at 35A

Wednesday, March 27, 2024, 16:35 ramping down BIAS to 0V.

 Wednesday, March 27, 2024, 16:38  decreasing TGHT TBHT to 0A 0A at 1A/30s in preparation to switch to anode mode in the morning.

 Thursday, March 28, 2024, 13:59 - Switched to anode mode

Thursday, March 28, 2024, 13:59 - ramping TGHT and TBHT to 100A at 1A/30s

Thursday, March 28, 2024, 14:37 increasing BIAS to 30kV 

 Thursday, March 28, 2024, 14:47 - ramping TGHT/TBHT to 440A/290A at 1A/7s

Thursday, March 28, 2024, 15:56    mass scan with 200V 62A cathode coil. gas on at 0.5 bar. (bias at 29.8kV)

Thursday, March 28, 2024, 15:56    mass scan with 200V 62A cathode coil. gas vented. (bias at 29.8kV)

Thursday, March 28, 2024, 16:29     ramping TGHT/TBHT to 490A/320A at 1.4A/10s

Thursday, March 28, 2024, 16:36     mass scan with 200V 62A cathode coil. gas on at 0.5 bar. (bias at 29.8kV)

Thursday, March 28, 2024, 16:56     mass scan with 200V 62A cathode coil. gas vented. (bias at 29.8kV)

Thursday, March 28, 2024, 17:13      dropping bias to 0

Thursday, March 28, 2024, 17:14      cooling tght and tbht at 1A/30s

Switched to Anode mode on March 28 including polarity. The old calibrated leak was also re-installed.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Has not run through EVAP2.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

HS note:

Base# 45235-16

Lid# 39956-8

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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 

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

 November 28, 2024 1:46PM

Checked in on sample in ATTS.

  Tuesday, December 03, 2024, 15:48

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

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

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

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.

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