 Monday, May 22, 2017, 09:43, Aaron Schmidt, , HP-FEBIAD-CTL, , , , , , Tri-Coil CTL-FEBIAD test IV 
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Monday, May 22, 2017, 09:41: Roughing.
Monday, May 22, 2017, 10:00: Turbo pumps started.
Tuesday, May 23, 2017, 07:45: Power/sources on. |
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Friday, June 02, 2017, 15:57, Aaron Schmidt, SiC#36, HP-FEBIAD-CTL, ITW, TM2, 41369-10, 42132-6/9, , Conditioning SiC#36 9x
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Friday, June 02, 2017, 15:20: Coil loose (Remove lid, Tighten and place lid again)
Friday, June 02, 2017, 15:52: Roughing
Friday, June 02, 2017, 16:13: Turbo pumps on. |
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Tuesday, June 06, 2017, 09:22, Aaron Schmidt, , , , , , , , Pump down empty chamber
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Tuesday, June 06, 2017, 09:21: roughing.
Friday, June 09, 2017, 08:50: Ion gauge off. Turbo pumps off.
Friday, June 09, 2017, 10:46: Venting. |
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Wednesday, June 07, 2017, 12:49, Aaron Schmidt, , , , , , , , Gas bottles
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Gas bottles for FEBIAD testing were exchanged yesterday around 1:30. One Neon & one Argon bottle were removed.
Two Neon bottles were added. |
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Friday, June 16, 2017, 11:23, Aaron Schmidt, , , , , , , , Pump down empty chamber.
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Friday, June 16, 2017, 11:22: roughing.
Friday, June 16, 2017, 14:28: Turbo pumps on
Friday, June 30, 2017, 10:37: Ion gauge, turbos off. |
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Monday, July 17, 2017, 09:58, Aaron Schmidt, , HP-SIS, , , 42218-8, 42738-1, , Target cleaning test (Long) HP-SIS CC Clean
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Target
Test (Fully Cleaned vs Crystal Clean only).
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Monday, July 17, 2017, 10:04, Aaron Schmidt, , HP-SIS, , , 42218-10, 42738-1, , Target cleaning test HP-SIS Full Clean
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Target
Test (Fully Cleaned vs Crystal Clean only).
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Monday, September 25, 2017, 14:10, Aaron Schmidt, , , , , , , , Pump down empty chamber
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Monday, September 25, 2017, 14:10: Roughing.
Wednesday, September 27, 2017, 08:23: Turbo pumps on
Friday, October 06, 2017, 09:04: Ion gauge off. Turbos off. |
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Tuesday, October 10, 2017, 13:10, Aaron Schmidt, , , , , , , , Gas bottles
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Tuesday, October 10, 2017, 09:30: Install/swap gas bottles. Elog.
Removed smallest Neon leak. Neon Bottle Serial #11231. Leak rate calibrated @ 1.59e-07 atm*CC/sec (02/09/2016)
In use: |
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Tuesday, October 24, 2017, 11:38, Anders Mjos, , , , , , , , FEBIAD coil magnetic field measurment
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with Fernando
Tuesday, October 24, 2017: Testing setup with triple coil
Wednesday, October 25, 2017: Field mapping at 70 A and current/field measurements on triple coil. |
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Thursday, December 21, 2017, 15:12, Anders Mjos, , , , , , , , Powered down devices
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| Powered down vacuum gauge and turbo pump controllers |
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Wednesday, February 07, 2018, 08:46, Aaron Schmidt, , , , , , , , BIAS Power supply installation
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Wednesday, February 07, 2018, 08:40: A 75 kV Glassman power supply was installed in the rack for use in further HV testing.
-The 75kV power supply is linked into the keyed interlock system. The key & switch labelled BIAS/EZL will unlock it.
-The PS is currently not connected to the epics controls and can only be adjusted manually. |
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Thursday, February 08, 2018, 16:54, Carla Babcock, , , , , , , , EZL strange behaviour
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Thursday, February 08, 2018, 16:54
Testing the HV bias I found that the einzel lens was behaving strangely. When I tried to put it higher than 1kV, the current would start spiking
from 12uA to > 100uA. The voltage would jump around quite a bit as well (+/- 100V). Everything seems the way it was before, except the EZL power supply |
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Friday, February 09, 2018, 08:57, Carla Babcock, , , , , , , , TSGBIASSAFETY ok interlock
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Friday, February 09, 2018, 08:25 Disconnected the AC power chain from the old bias supply but now cannot turn on the new bias supply
in EPICS because the "TSGBIASSAFETY ok" interlock is tripped. No idea what this means - maybe it checks for AC power?
Friday, February 09, 2018, 08:48 Reconnected power to old bias supply, does not fix problem. Talked to Mike, he thinks it is |
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Tuesday, February 13, 2018, 12:17, Carla Babcock, , , , , , , , Ramping up bias to 60kV with conditioning station supply
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Ramped up to 60kV with the new power supply, same as what we did last time with the standard test stand bias supply (see entry #627 ). Much more instability
on the bias current readout (see attached screen shot), develops around 54kV. As well, the old supply read out 37uA at 60kV while the new supply reads
out ~85uA. This could just be an EPICS read back issue though. |
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Tuesday, February 13, 2018, 16:47, Carla Babcock, , , , , , , , Ramping to 63kV - some sparks
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Sparks at 62kV on the bias.
Turned it down, turned it back up and got a spark at 60kV.
Now up to 63kV, no sparks so far (5 mins). Left EE @ -3100V and EZL @ 28.5kV |
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Friday, February 16, 2018, 15:21, Carla Babcock, , , , , , , , Cleaned HV cage - trying bias again
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I vacuumed inside the HV cage, though it has many small areas that are difficult to access so I am not sure how great a job I did.
Turned the bias up and again at 55kV I hear small sparks near the end of the HV duct that brings the cables from the rack. Cannot see anything.
If it is really sparking where it sounds like sparking, it must be from the edge of the duct to the faraday cage. |
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Monday, February 19, 2018, 08:30, Carla Babcock, , , , , , , , TMSTP6 off
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| Found TMSTP6 off, restarted it, seems fine now (drawing 0.8A) |
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Monday, February 19, 2018, 14:01, Carla Babcock, , , , , , , , Attempts to get to higher voltages, summarized.
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The test stand holds up to 63kV, however at voltages over 54kV there are small discharges, rising to a continuous level around 60kV. The best guess right
now is that these are coronal discharges coming from the end of the HV duct to the faraday cage. The only way to fix this would be to round out the edges
of the duct, or to move the duct farther away. Since I have heard small discharges in other places, we may need to make a variety of modifications. Things |
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Tuesday, February 20, 2018, 09:04, Carla Babcock, , , , , , , , Trying HV with rubber corona shield
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Tuesday, February 20, 2018, 09:01: Sparks at 62.5kV after a couple minutes. Sounds like they were in the EE spark gap but don't appear on the EE read
current. Ozone smell around 61kV, so there are still some discharges.
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