 Tuesday, September 29, 2020, 11:56, Aaron Schmidt, , LP-SIS, , , , , Problems/Solutions, Leak check 3.0
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Installed Indium gasket on FS#2 - (C) water block / R- TGHT.
Tuesday, September 29, 2020, 11:23: Pressurize to 120 PSI at atmosphere.
LD: 0.0E-07 atm-CC/sec |
Monday, November 02, 2020, 08:52, Aaron Schmidt, , , , , , , Problems/Solutions, Leak check / Troubleshoot 
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Monday, November 02, 2020, 08:46:
Large Vacuum spike noted 5:30 approx. Tripped TS. On tail end of the Nb#9 conditioning run. HV & heating were completed last week
Monday, November 02, 2020, 08:47: Vacuum @ 2.66e-06T. |
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Monday, November 23, 2020, 10:03, Aaron Schmidt, , , , , , , Problems/Solutions, RP2 Check / pump down issue
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TMSRP2 has been struggling since the power bump occurred Nov 18, 2020
Monday, November 23, 2020, 09:48: Open TMS:PV2.
Monday, November 23, 2020, 09:51: Close TMS:PV2. CG2B @ 0.515T. |
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Tuesday, December 01, 2020, 11:56, Carla Babcock, , , , , , , In progress, Modifications to test stand for TM3 tests
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Tuesday, December 01, 2020, 11:56 :
TSG:BIAS unplugged and controls pigtail (made by Ray) added in order to connect controls cable to TCS:BIAS, which is now installed in the same
rack. |
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Tuesday, December 01, 2020, 17:04, Carla Babcock, , , , , , , Problems/Solutions, Found another burned jumper cable
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Between feedthroughs F (magnet coil) and B (tube heater negative), I found a jumper with two resistors that has been burned up. I am not sure when this
happened, but it would be good to review the overall setup of the service cap wiring in the new year.
The cable connected to feedthrough Q where the multipin sits also looks burned. |
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Wednesday, December 02, 2020, 08:32, Carla Babcock, , , , , , , , Modifications to test stand for TM3 tests
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Wednesday, December 02, 2020, 08:31 :
Added copper wire connection to multipin screw terminals in HV cage to make sure they are grounded.
Attached grounding rod to back of HV cage. Not ideal, but couldn't find a better place without making a extension to the cable. Will see what John |
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Wednesday, December 02, 2020, 16:18, Fernando Maldonado, , , , , , , Done, Gas delivery system upgrade
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Yesterday, December 1st, I successfully installed and tested the gas system inside the faraday cage.
The changes performed were as follows:
Remove He gas tank (to make room for new tank)
Remove calibrated leak to connect new gas line
Remove convectron |
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Thursday, December 03, 2020, 15:55, Carla Babcock, Alexander Shkuratoff, , , , , , , , Modifications to ISAC test stand for TM3 tests
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Thursday, December 03, 2020, 15:54 :
Got sign off from John Chow to run the system, though the nylon insulator was not ready when he came by. But we went over everything together.
Installed blue nylon insulator with all vacuum surfaces cleaned at least with methanol. No NPT fitting or tube installed, just testing service |
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Friday, December 04, 2020, 08:53, Carla Babcock, , , , , , , , Modifications to test stand for TM3 tests
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Friday, December 04, 2020, 08:52 :
Test stand roughed down to 29mT overnight. Started turbos for testing later. |
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Friday, December 04, 2020, 13:39, Alexander Shkuratoff, , , , , , , Done, TM3 service tray prototype preparatory HV tests
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Friday, December 04, 2020, 13:34
Vacuum is at 3.6e-6 Torr and possibly still dropping. Starting HV tests with just a tube and wire hanging down from the feedthrough. Turned on
power supply and started raising voltage. |
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Tuesday, December 08, 2020, 11:54, Carla Babcock, , , , , , , , Modifications to test stand for TM3 tests
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The copper tubes to be used in the TM3 test piece may have flux inside them from soldering the end caps on. There are holes along the length for outgassing,
and we will try to bake them out in the test stand before installing them. There is still a dummy bake out target installed there, see the photo for how
the tubes are loaded in. TGHT ramping started around 3pm. |
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Friday, December 11, 2020, 15:02, Carla Babcock, Sam McEwen, Aaron Schmidt, , , , , , , , Modifications to test stand for TM3 tests
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Test piece installed with Sam, Aaron and Alexander. Ended up shimming the support stand (middle foot) since it seemed to be bowing a bit and distorting
the gap between the containment box stand-in piece and the service tray piece. We should measure the gaps when testing is done with the same configuration.
Installation was not too hard, installed the whole thing as one piece. Had to remove the middle foot on the long side to get it through the door but otherwise |
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Monday, December 14, 2020, 11:50, Alexander Shkuratoff, , , , , , , In progress, TM3 service tray prototype HV tests
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Monday, December 14, 2020, 11:30
Switched off all breakers in HV cage. Started HV testing of TM3 prototype.
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Tuesday, December 15, 2020, 11:24, Alexander Shkuratoff, , , , , , , , TM3 service tray prototype HV tests
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Tuesday, December 15, 2020, 11:15
Vacuum at 1.0e-6 Torr. Turned bias power supply on, starting HV ramp at 500 V increments, increasing every 30-50 seconds seconds or so.
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Wednesday, December 16, 2020, 10:32, Carla Babcock, Alexander Shkuratoff, , , , , , , , TM3 service tray prototype HV tests
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Wednesday, December 16, 2020, 10:30 (Carla) :
Started ramping up about 45 mins ago, now at 50kV with no issues. No sparking, occasional current draw to get to the next voltage step. Test piece
is no longer drawing any current, as opposed to yesterday when it was drawing around 4uA at this point. Trace left on insulator must have partially evaporated |
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Thursday, December 17, 2020, 08:16, Carla Babcock, Alexander Shkuratoff, , , , , , , ,
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Ramping up to 75kV. Started drawing current at 63.5kV this time.
Now at 75kV, drawing 5uA of current. Ramp up easy.
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Monday, December 21, 2020, 07:58, Aaron Schmidt, , , , , , , , Shutdown TS
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Shutting down the ISAC TS for the planned outage on Dec 22.
Monday, December 21, 2020, 07:50: Ion gauges & turbo pumps off.
Monday, December 21, 2020, 07:51: Confirm wire scanner shutoff. |
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Monday, January 04, 2021, 08:17, Aaron Schmidt, , , , , , , , Restart TS
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Restarting TS after holidays & planned power outage.
Monday, January 04, 2021, 08:17: All epics controls in a 'white out' state.
Monday, January 04, 2021, 08:20: Rebooted PLC / IOC. Controls returned. |
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Monday, January 11, 2021, 14:20, Carla Babcock, , , , , , , , Test stand wiring reverted to anode bias mode
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I have rewired the test stand (service cap wiring only, not power supply wiring) to anode bias mode as shown in the diagram. This was not how it was
wired before, there are several things I have removed that appear to be newer additions. I also removed the burned cable between TBHT(-) and COIL(-), and
between the multipin feedthrough and ground (probably related to the other burned cable). |
 Thursday, January 14, 2021, 08:31, Fernando Maldonado, , , , , , , In progress, Gas delivery system upgrade
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Fernando Maldonado wrote:
Yesterday, December 1st, I successfully installed and tested the gas system inside the faraday cage. |
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