Tuesday, March 11, 2025, 14:36 Roughing. Target installed.

Tuesday, March 11, 2025, 15:06 TP1B turned on.

Tuesday, March 11, 2025, 15:10 TP1A turned on. 

Tuesday, March 11, 2025, 15:18 IG1 Turned on 6.25e-05T 

Tuesday, March 11, 2025, 16:39 Turned water on. Started autoramping TGHT/TBHT to 580/230A at 1A/30s

Wednesday, March 12, 2025, 11:03  slowly ramping BIAS/EE/EZL to 30/2.5/13 kV 

Wednesday, March 12, 2025, 14:00 no beam seen out. It seems that FC0 is working though. Investigation needed

Wednesday, March 12, 2025, 16:00 decreased HV to 0 to investigate. See report (to be released and attached) for more information

Friday, March 14, 2025, 09:20 :  increasing TGHT TBHT to 100A at 1A/30s, then to 580/230A at 1.7A/10s. 

Friday, March 14, 2025, 11:31 increasing BIAS/EE/EZL to 30/2.5/13 kV 

 Friday, March 14, 2025, 12:57    it appears that everything is stable. FC0 = 3.6e-10 A (VQSX).  beginning mass scan.  mass scan saved as '2025-03-14-13-30 MM a 0A.txt'

Friday, March 14, 2025, 14:12 mass separator focused at mass 115 to visualize indium.

Friday, March 14, 2025, 14:12  increasing MM current, following mass peak.

__ Current __ FC6 output __

    0A        1.9e-11

    1A        2e-11

    2A        2.22-11

    3A        4.6e-11

    4A        5.9e-10

    5A        3.6e-9

    6A        8.6e-9

 Friday, March 14, 2025, 14:39  conducting mass scan.   '2025-03-14-15-20 MM b 6A.txt'   after the scan, it was noticed that the mm current had failed at some point during the scan.

Friday, March 14, 2025, 15:27   conducting mass scan with 0A mm current.  saved as 2025-03-14-15-55 MM c 0A.txt

Friday, March 14, 2025, 15:55 ramping down HV

Friday, March 14, 2025, 15:56 ramping down TGHT TBHT to 0 (1A/30s) to assess and correct mm OL issue

Tuesday, March 18, 2025, 14:49 After bringing down vacuum to open test stand, the mass marker connection has been investigated. Two multipin connections have become disconnected, seems to be at a soldered junction.

Tuesday, March 18, 2025, 14:51    MM has been moved to different pins for operation. multipin will be fixed at a later date. Now test stand has been vacuumed down and TGHT TBHT brought to 580 230 for measurement.

Tuesday, March 18, 2025, 14:51 MM temperatures:

MM current    _____    temperature:

0A ___ 195.8°C

1A ___ 198.1

2A ___ 223.7°C

3A ___ 282.1°C

4A ___ 370.1­­­°C

5A ___ 486.4°C

6A ___ 631.6°C

Tuesday, March 18, 2025, 16:17 cooling TGHT TBHT at -1A/30s to 0A

Wednesday, March 19, 2025, 16:30 :  Mass marker replaced - new ceramic oven and sleeve, new reservoir with Indium - 0.102g.  Same transfer tube and target assembly

Wednesday, March 19, 2025, 16:45:  Install complete, roughing vacuum

Wednesday, March 19, 2025, 17:07  Turbopumps on

Thursday, March 20, 2025, 10:00 :  Water cooling on. Increasing TGHT TBHT to 580 230 at 1A/30s.

Thursday, March 20, 2025, 12:00 :  at ~200A 200A, increased heating rate to 1A/10s

Thursday, March 20, 2025, 13:45 increasing HV BIAS/EE/EZL to 30/2.5/13 kV 

Thursday, March 20, 2025, 14:32   at HV now, stable. Beginning mass scan.    

 Thursday, March 20, 2025, 15:15  magnet positioned at mass 115

Friday, March 21, 2025, 11:08   Temperature testing

Current ___ Temperature

0A     184.5

1A     187.2

2A     208.3

3A     268.7

4A     374.1

5A     419.2

6A     495.8

 Friday, March 21, 2025, 12:09   cooling TGHT TBHT at 1.7A/10s to make Faraday cage accessible for controls work

                           decreased cooling rate to 1A/20s for final 100A. at 14:00, test stand was opened for controls work.

Wednesday, March 26, 2025, 10:08   Turbo pumps switched off for venting and changing the mass marker reservoir

Wednesday, March 26, 2025, 18:01  Chamber opened, MMR replaced with MMR3, roughed, now turbopumps on.

Thursday, March 27, 2025, 12:38 TGHT TBHT brought up to 580 230 at 1A/30s for 100A and then 1.7A/10s for the rest. now increasing  HV BIAS/EE/EZL to 30/2.5/13 kV 

 Thursday, March 27, 2025, 13:58    at high voltage, beginning mass scan.   (h)

Thursday, March 27, 2025, 14:37    Magnet at 115, measuring beam output with increases of MM current

current ___ FC6 output

0A    8.2e-11

1A    8.2e-11

2A    8.6e-11

3A    1e-10

4A    1.88e-10

5A    5e-10

6A    8.7e-10

Thursday, March 27, 2025, 15:26 beginning mass scan at MM 6A. --- MM Current failed at the beginning of the mass scan. data still collected - indium peak lower than expected due to gradual cooling. mass scan saved (i) 2025-03-27_15-32 mm i 6A-0A.txt

Thursday, March 27, 2025, 15:33   cooled 0A mass scan beginning - (j) 2025-03-27_16-13 mm j 0A.txt

Thursday, March 27, 2025, 16:32  decreasing HV to 0

Friday, March 28, 2025, 09:13  spinning down turbo pumps to vent system. Must *begin* to repair/replace the multipin connection. - will affix twisted pair to two appropriate channels for IGLIS AC

Tuesday, April 08, 2025, 12:26   spinning down turbo pumps 

 Wednesday, April 09, 2025, 15:36  Twisted pair wire shielded, routed and crimped for iglis and high(er) current purposes. multipin channels 8 and 9.

                 roughing.

 Wednesday, April 09, 2025, 16:26   turbo pumps on

Thursday, April 10, 2025, 09:43    beginning heating - TGHT TBHT to 580 230 at 1A/30s

Thursday, April 10, 2025, 10:41     at 100A100A. increasing ramp rate to 1.7A/30s

Thursday, April 10, 2025, 11:39 increasing HV BIAS/EE/EZL to 30/2.5/13 kV 

 Thursday, April 10, 2025, 14:49   mass scan at 8A. Frequent sparking, ~1/min but doesn't appear to be affecting anything. no affect on optics or power supplies.  appears to be inside TS chamber as well.   mass scan saved (l 8A) 2025-04-10_15-04 mm l 8A.txt

Thursday, April 10, 2025, 14:50   MMR current decreased to 6A. waiting to cool to begin mass scan. sparks have stopped .

Thursday, April 10, 2025, 15:08  beginning mass scan.  (m 6A)  saved. 2025-04-10_15-34 mm m 8A.txt

Thursday, April 10, 2025, 15:34  MMR current 0A. repeat mass scan after cooled. (n 0A) saved.  2025-04-10_16-10 mm n 0A.txt

Thursday, April 10, 2025, 16:02 voltages to 0 for temperature testing

Current ___ Temperature

0A    205     

1A     205.5 

2A     227    

3A     268    

4A     327    

5A     391    

6A     462      

7A     546

8A      645.6

Thursday, April 10, 2025, 16:51    cooling TGHT TBHT at 1A/30s

 Friday, April 11, 2025, 09:00  spinning down turbo pumps to vent chamber. must replace source cup (p2n style --> old style)

Friday, April 11, 2025, 09:56  opened VV1 to begin venting the chamber. 

Friday, April 11, 2025, 15:39    P2N source cup removed, old source cup installed for repeat test. roughing chamber now.

 Friday, April 11, 2025, 16:05   turbo pumps on

Monday, April 14, 2025, 09:43  Water cooling on. TGHT TBHT ramping up at 1A/30s to 580A/230A

Monday, April 14, 2025, 12:57 increasing HV BIAS/EE/EZL to 30/2.5/13 kV 

Monday, April 14, 2025, 16:53   This trip has caused some sort of communication issue with the TGHT, This caused TGHT to be 'stuck' at 580A. I had to eventually cut power to the supply and have power cycled it. have not been able to restore power to it remotely

Fixed TGHT. Was able reset it locally after opening the cage.

Tuesday, April 15, 2025, 08:06   Turbo pumps off to vent, remove target and examine. 

Tuesday, April 15, 2025, 08:43   VV1 open 

Tuesday, April 15, 2025, 11:22   Target opened, taken apart, examined. Appears that the MMR transfer line had become dislodged from the target block, preventing transfer. Fixed this, reassembled, put back in TS.

Tuesday, April 15, 2025, 11:23  roughing.

Tuesday, April 15, 2025, 12:00  turbo pumps on.

Tuesday, April 15, 2025, 13:23  water cooling on. no effect on vacuum

Wednesday, April 16, 2025, 09:37 ramping TGHT TBHT 

Friday, February 28, 2025, 15:54 : installed target assembly in test stand

Friday, February 28, 2025, 15:54  roughing

Friday, February 28, 2025, 17:16 Turbo pumps on

Monday, March 03, 2025, 15:00 Ramping TGHT/TBHT to 580/230A at 1A/30s

 Tuesday, March 04, 2025, 13:46  increasing BIAS/EE/EZL  to 30/2.5/13  kV 

Tuesday, March 04, 2025, 14:00  Optics on. SIS tune confirmed

Tuesday, March 04, 2025, 14:30   Mass scan complete - no end caps - no beam

Tuesday, March 04, 2025, 17:35 Current integrators appear to be down. Investigating further. 

Tuesday, March 04, 2025, 17:35    at 30kV, there was sparking once approximately every 5 minutes. over time, the voltage was decreased and at 26kV the spark frequency decreased to one every 20-30 minutes. This sparking appeared to be from BIAS to EZL based on the strip tool data. It was also silent, so likely inside the test stand chamber.  Two sparks over the HV time appeared to spike the TGHT current as well, although there was no disruption to TGHT operation

Tuesday, March 04, 2025, 17:38  HV BIAS / EE / EZL ramped down to zero

Tuesday, March 04, 2025, 17:38  ramping down TGHT/TBHT to zero at -1A/30s

Thursday, March 06, 2025, 09:45 Increasing BIAS / EE / EZL to 30/2.5/13kV to see if sparking persists while cold.

Thursday, March 06, 2025, 16:11 no sparks seen, even at 30kV

Thursday, March 06, 2025, 16:14  HV ramped down.

Thursday, March 06, 2025, 16:14   ramping back up TGHT TBHT to 580 230 at 1A/30s to reevaluate sparking

Friday, March 07, 2025, 09:06   ramped up HV/EE/EZL to 20/2.5/13 kV to continue HV conditioning. will be bumping up HV throughout the day depending on spark frequency

Friday, March 07, 2025, 23:30  ramped down HV/EE/EZL to zero, at end of day HV BIAS was at approximately 22kV after a 90 minute period of no sparking.

Saturday, March 08, 2025, 17:08    increasing HV/EE/EZL 20/2.5/13 kV  to resume HV conditioning.

Saturday, March 08, 2025, 23:59   At 30kV, no sparks seen for 30 min. Conditioning appears to have been effective. Suspicion is that the sparking is likely due to test stand infrequent use during improvements, etc.

Sunday, March 10, 2025, 00:07 decreasing HV/EE/EZL to zero.

Sunday, March 09, 2025, 00:13  cooling TGHT TBHT to 0A 0A at 1A/30s 

Tuesday, March 11, 2025, 09:44  winding down turbo pumps

Recent tests have shown that CATHODE voltage breaks down at ~130V, continually leaking current and progressively dropping voltage, making febiad CATHODE testing impossible.

Thursday, January 23, 2025, 15:18    disconnected cathode wire from TBHT feed through, simply suspended in cage.

voltages are held for ~1min prior to increase. current will be reported after 1min and stable.

100V - 0.000mA

120V - 0.000mA

130V - 0.000mA

140V - 0.000mA

150V - 0.000mA

170V - 0.000mA

200V - 0.000mA

- the Cathode wire and power supply have no leak problem

Thursday, January 23, 2025, 15:42

Reattached the CATHODE line to TBHT feedthrough. Removed the 100||100kΩ resistor pair that connects TBHT to HVC.

Same process as before:

100V - 0.000mA

120V - 0.000mA

125V - 0.000mA

130V - 0.000mA

135V - 0.000mA

140V - current limit ---> dropped to 52V

-- The TBHT resistor pair is not the problem

venting chamber to investigate lines.

Thursday, January 23, 2025, 17:05

removed piece of broken ceramic that held the coil terminal

still current leaking, but it's not as immediate or as shorted. more resistive.

__V__mA__

30    0

35    2.4

40    6.1 

45   12.2

50   19.5

55   32

60   gradually ramped up to limited

Thursday, January 23, 2025, 17:10

Disconnected COIL terminal.  Behaviour still similarly bad. Doesn't seem to have improved.

Disconnected all TBHT and TGHT feedthroughs. ALL are now isolated from ground (AS BEFORE). TBHT + and - are isolated from all others, TGHT + and - are isolated from all others but 100R apart due to resistor at feedthroughs (as expected).

Increasing CATHODE voltage on TBHT+ feedthrough to test isolation.

V ____ mA

120  ___ 0

135 ____ 0

150 ____ 0

200 ____ 0

- The TBHT+ terminal does not leak directly to ground

Connecting CATHODE cable to TBHT(-) feedthrough to test

V___mA

130 __ 0

150 __ 0

200 __ 0

- the TBHT- terminal does not leak directly to ground.

Connecting CATHODE to TGHT+ feedthrough , and disconnected the 100R between - and +

V ___ mA

100 __ 0

150 __ 0

200 __ 0

- the TGHT + terminal does not leak directly to ground

Connecting CATHODE to TGHT-  feedthrough:

V __ mA

125 __ 0

150 __ 0

200 __ 0

- the TGHT- terminal does not leak directly to ground.

connected cathode cable to TBHT+ cable.

V __ mA

30 __ 0

40 __ 0

50 __ 12

60 __ 35

70  -> 60__ 80 current limited

Disconnected 100R path between TBHT and TGHT power supply

CATHODE cable still on TBHT+ cable

V __ mA

150 __ 0

200 __ 0

TBHT is not the problem

reconnected 100 path from TBHT to TGHT.  REMOVED varistors that connect TGHT to ground

V __ mA

100 __ 0

200 __ 0

These are likely the issue.

Reconnected varistors to confirm

SHORTED at 50 V -- 10mA, 65V gives 80mA, current limited.

Removed varistors.  WIll have to acquire appropriately specced ones

 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.