 Thursday, February 04, 2021, 18:48, Fernando Maldonado, , LP-SIS, , , 44139-10, 44378-2 , Problems/Solutions, Energy spread calibration with SIS 6x
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The system was vented to make clearance on the waterlines as a very small continuous discharge was observed.
The inspection revealed some marks on the HS water line (sideview photo). From the the bottom and from real close (zoom and backview photo) the
marks are quite noticeable with shinny copper in the middle and dark circles around. |
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Monday, February 01, 2021, 08:38, Fernando Maldonado, , LP-SIS, , , 44139-10 , 44378-2 , Failed, Energy spread calibration
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Monday, February 01, 2021, 08:38 : The anode seems to be shorted but we can still test the amount of dispersion at the image position, and
correlate with energy spread.
Monday, February 01, 2021, 11:27: Bias/EZL/EE @ 30/0/1.5 kV. |
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Friday, January 29, 2021, 09:13, Aaron Schmidt, , LP-SIS, , , 44139-10, 44378-2, In progress, TS settings ok.
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Friday, January 29, 2021, 09:11: CANBUS controller was replaced. Quick systems check ok. Sources, HV, & Optics all good.
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Thursday, January 21, 2021, 10:55, Fernando Maldonado, , , , , , , Done, Updated Good Vac value for TSG:IG1
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On Tuesday the hard good vacuum level was changed from 7e-6 T to 1e-5 T to allow larger leak rates when testing FEBIAD.
Also this new level should allow faster heating rates (be mindful and cautious)
Work done as per WP C2021-01-19-9 |
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Thursday, January 21, 2021, 10:10, Fernando Maldonado, , LP-SIS, , , 44139-10, 44378-2, Done, Energy spread calibration - SIS with TBHT negatively biased
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Thursday, January 21, 2021, 10:05: Anodeless Negative Bias On Surface Ion Source, or ANBOSIS (still working on the acronym). installed to
test energy spread vs position.
The SIS allow a more forgiving operation while calibrating such that other sources can have these type of measurements. |
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Wednesday, October 30, 2019, 14:50, Fernando Maldonado, , , , , , , Problems/Solutions, Cathode bias mode configuration
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Wednesday, October 30, 2019, 14:49: John C. changed the polarity of the anode power supply to negative, and Fernando M. rewired the cabling on the service
cap. |
 Wednesday, January 20, 2021, 11:30, Fernando Maldonado, , , , , , , Done, Cathode bias mode configuration confirmed
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Fernando Maldonado wrote:
Wednesday, October 30, 2019, 14:49: John C. changed the polarity of the anode power supply to negative, |
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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, 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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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). |
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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, 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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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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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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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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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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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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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 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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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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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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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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