New seals with a blank off cap are installed on TM2 window line water block.   The seals are checked at TCS with 70 psi helium for 5 minutes with LD at 0.0xE-9atm/cc.sec. No response on LD during test. Seals are good.

 TM#2 has been moved from the conditioning station to the south hot cell.

This morning new water block fasteners and gas line capture nut fasteners were inserted into the hot cell. Window waterline blank off was removed from TM2, surfaces inspected and given a polish with Veltex (30 seconds, 70 psi) as there was a small bit of c seal residue. Transfer try with new source tray has been latched to the module.

Link to previous target information: https://elog.triumf.ca/TIS/RH-ISAC/1039

Monday, March 25, 2019, 10:00: Target electrical checks (See Attachment 1)

Tested for TM2 

 TM#2 with a new source tray and the dummy target has been moved from the south hot cell to the conditioning station.

 Electrical Check of TM#2 with the dummy target attached.

 The four electrical check done on TM#2 during the source tray change.

Helium pressure test on TM2 all water circuits is done. 70 psi helium , 10 minutes test time. Leak detector :base leak rate 0.0XE-9 atm.cc/sec, base pressure 0.0Xe-4torr. No any response on LD during the test. All TM2 water circuit are leak free.

David Wang wrote:

Helium pressure test on TM2 all water circuits is done. 70 psi helium , 10 minutes test time. Leak detector :base leak rate 0.0XE-9 atm.cc/sec, base pressure 0.0Xe-4torr. No any response on LD during the test. All TM2 water circuit are leak free.

 Thursday, March 28, 2019, 12:40: Found valve to expansion tank TCS:TK2 to be closed. Opened valve. This allow air to escape out of the system and the water system is running as expected again

Friday, March 29, 2019, 11:15: Changed EE to conditioning mode

Friday, March 29, 2019, 11:35: BIAS / EZL 20 / 10 kV

Friday, March 29, 2019, 13:47: BIAS / EZL: 25 / 12.5 kV

Friday, March 29, 2019, 16:09: BIAS / EZL: 30  / 15 kV

Friday, March 29, 2019, 17:23: No sparks for >60 min

Friday, March 29, 2019, 17:26: BIAS / EZL off

Monday, April 01, 2019, 08:13: BIAS / EZL: 30  / 15 kV

Monday, April 01, 2019, 08:33 BIAS / EZL: 35  / 17.5 kV

Monday, April 01, 2019, 09:00: Sparking at about 37.5 kV BIAS. Lowered below 20 kV to stop. Now sparking at around 20 kV

Monday, April 01, 2019, 10:00: BIAS/EZL 22 / 20 kV. Occasional sparking on BIAS as voltage is increased.

Monday, April 01, 2019, 10:05: Change of strategy. Will heat target to bake out the vacuum before continuing with HV conditioning.

Monday, April 01, 2019, 10:43:

BIAS / EZL / EE: 15 / 7.5 / 1.5 kV
COIL / ANODE: 10 A / 200 V
Ramping TGHT / TBHT at 1 A/min. Good/bad vacuum (IG2): 1E-6 / 2E-6 Torr

Monday, April 01, 2019, 19:16: TGHT / TBHT: 500 / 270 A. Vacuum increasing. IG1/2 1.2E-7 / 1.4E-6 Torr

Monday, April 08, 2019, 09:28: BIAS / EZL: 20 / 10 kV (some periods of multiple sparks)

Monday, April 08, 2019, 10:28: BIAS / EZL: 30 / 15 kV (some periods of multiple sparks)

Monday, April 08, 2019, 11:24: 3 sparks for the last 60 min

Monday, April 08, 2019, 14:43: BIAS / EZ: 40 / 20 kV (after two periods of sparking around 39 kV requiring voltage to be reduced below 30 kV to recover)

Monday, April 08, 2019, 15:57: Two sparks in 70 min

Tuesday, April 09, 2019, 12:40: BIAS / EZL 40 / 20 kV with >90 min without sparking

Tuesday, April 09, 2019, 16:00: BIAS / EZL 48 / 24 kV

Tuesday, April 09, 2019, 16:07: Sparking tripped TPs and IG1S, then power supplies.

Tuesday, April 16, 2019, 16:41: BIAS / EZL 50 / 25 kV for 1 hour without sparking.

Wednesday, April 17, 2019, 15:23 : Continued without problems to 50 kV earlier, but sparks tripped off vacuum just above 50kV. Continue later.

Ta #58 has been installed onto TM2. All new silver plated high current fasteners. All torqued to 130 in lbs.

 Results of the electrical check of TM#2 without target and with the new Ta#58 target.

 TM#2 with Ta#58 has been moved from the south hot cell to the east target station.

ITE water signal interlock check is done. Everything is good. Coil 2   circuit no longer used in ITE . PQRU are looped as one circuit fro coil 1 circuit on Module since now.

ITE is configured to take proton beam.

Starting HV tests on TM2 with 50uA of protons.

Tuesday, August 06, 2019, 03:37 : Ramping up 500V every 2mins or so, couple of sparks, then consistent sparks at 34kV. No vacuum response on IG1 for any sparks, even though the current spikes from around 40uA to 1300uA. Brought it down to 28kV to stop sparking. See a response on the EZL frequently.

Tuesday, August 06, 2019, 05:24 : Going above 30kV proves very difficult, lots of up and down, frequent sparks, still no vacuum response. Still seeing an EZL response.

Tuesday, August 06, 2019, 05:58 : Up to 31.5kV on bias, 1046V on EE and 15kV on EZL.

Tuesday, August 06, 2019, 06:50 : Controls are being sticky - not responding well.

Tuesday, August 06, 2019, 07:25 : Sat at 32 kV > 20mins with 2 sparks

Tuesday, August 06, 2019, 08:03 : lots of sparking at 36kV, went back down to 35kV. Current draw is 50uA.

Tuesday, August 06, 2019, 08:10 : lots of sparking after 9 mins at 35kV, had to turn it down to 34kV

Tuesday, August 06, 2019, 08:11 : Still sparking at 34, down to 33

Tuesday, August 06, 2019, 08:31 : At 33kV, sparked twice in 20mins and was going for another when the protons went off.

With protons off, the bias current dropped quickly from 66uA to 40uA and raising the bias to 40kV was not difficult.  Later bias up to 50kV. Still no conclusion on if the sparking was inside or outside of the vacuum. No vacuum response seems to indicate outside, however the influence of protons would indicate inside. To be investigated visually when TM2 comes to the HC.

TM2 was moved from ITE to South Hot Cell. Tantalum 58 target.

TM2 has been disconnected in ITE. The bias jumper between U and T was burned out during the last beam time.

 Here are the results of the electrical done at the south hot cell post beam of with the Ta#58 target attached and with just the module no target attached.

TM2 was moved from South Hot Cell to ITE. ZrC #8 target.

 Electrical of TM#2 with ZrC#8 at the south hot cell. See attached for details.