Logbooks Lab Maintenance Evaporator_1 Evaporator_2 Laser cutter Target Production Test-Stand RH-ISAC RH-Cyclotron RH-Meson Hall RH-Beamlines RH-ARIEL
  Test-Stand, Page 12 of 53  Not logged in ELOG logo
  ID Date Authordown Target/No.# Source Station Module Target Oven W.O# Heat Shield W.O# Status Subject Text Attachments
  1044   Tuesday, January 07, 2025, 17:06 Dave Neilson LP-FEBIAD  44692-442972-10In progressFEBIAD development Tuesday, January 07, 2025, 16:00
-  Target assembly installed in test
stand. electrical connections assessed:
  
  830   Friday, December 11, 2020, 15:02 Carla Babcock, Sam McEwen, Aaron Schmidt       Modifications to test stand for TM3 testsTest piece installed with Sam, Aaron and
Alexander. Ended up shimming the support
stand (middle foot) since it seemed to be
 20201211_140703.jpg20201211_140639.jpg20201211_140605.jpg 
  826   Thursday, December 03, 2020, 15:55 Carla Babcock, Alexander Shkuratoff       Modifications to ISAC test stand for TM3 testsThursday, December 03, 2020, 15:54 :
Got sign off from John Chow to run
the system, though the nylon insulator was
 20201203_150458.jpg20201203_173725.jpg 
  833   Wednesday, December 16, 2020, 10:32 Carla Babcock, Alexander Shkuratoff       TM3 service tray prototype HV testsWednesday, December 16, 2020, 10:30 (Carla)
:
Started ramping up about 45 mins
  
  834   Thursday, December 17, 2020, 08:16 Carla Babcock, Alexander Shkuratoff        Ramping up to 75kV. Started drawing current
at 63.5kV this time.
Now at 75kV, drawing 5uA of current.
  
  630   Thursday, February 08, 2018, 14:44 Carla Babcock      DoneConditioning station power supply integrated into EPICSThe 75kV power supply is now in EPICS under
the usual TSG:BIAS controls. The upper limit
has been set to 70kV to protect the transformer.
  
  631   Thursday, February 08, 2018, 16:54 Carla Babcock       EZL strange behaviourThursday, February 08, 2018, 16:54
Testing the HV bias I found that
the einzel lens was behaving strangely. When
  
  632   Friday, February 09, 2018, 08:57 Carla Babcock       TSGBIASSAFETY ok interlockFriday, February 09, 2018, 08:25   
Disconnected the AC power chain from the
old bias supply but now cannot turn on the
  
  633   Tuesday, February 13, 2018, 12:17 Carla Babcock       Ramping up bias to 60kV with conditioning station supplyRamped 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 ).
 vacuumbias_13022018.PNG 
  634   Tuesday, February 13, 2018, 16:47 Carla Babcock       Ramping to 63kV - some sparksSparks at 62kV on the bias.
Turned it down, turned it back up
and got a spark at 60kV.
  
  635   Friday, February 16, 2018, 15:21 Carla Babcock       Cleaned HV cage - trying bias againI 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
  
  636   Monday, February 19, 2018, 08:30 Carla Babcock       TMSTP6 offFound TMSTP6 off, restarted it, seems fine
now (drawing 0.8A)
  
  637   Monday, February 19, 2018, 14:01 Carla Babcock       Attempts to get to higher voltages, summarized.The test stand holds up to 63kV, however
at voltages over 54kV there are small discharges,
rising to a continuous level around 60kV.
  
  638   Tuesday, February 20, 2018, 09:04 Carla Babcock       Trying HV with rubber corona shieldTuesday, 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
  
  640   Monday, February 26, 2018, 09:13 Carla Babcock       Running list of changes to the ISAC test stand for >60kV operation1. Al corona shield installed over end
of the HV duct to suppress discharges from
the sharp edge of the duct.
 6x 
  642   Thursday, March 01, 2018, 10:05 Carla Babcock       HV tests with corona discharge problems solvedTurning up bias, no corona discharge at
60kV but a spark at 61.5kV bias, 31kV EZL,
-800V EE
 01032018_10am_61kVspark.PNG 
  643   Tuesday, March 06, 2018, 10:55 Carla Babcock       Trying HV without electronicsI have removed the resistor/varistor combinations
that go between the poles of the target and
tube heaters, and between those two supplies.
 spark_06032018.PNGnospark_06032018_1410.PNG 
  644   Thursday, March 08, 2018, 17:47 Carla Babcock       Change of electronics on target and tube power suppliesThe resistor/varistor combinations across
the target + / -, tube + / - and target-
/ tube + have been remade and moved to the
 IMG_20180308_152637.jpgIMG_20180308_152645.jpgTargetNeg.jpgTubeNegPos.jpg 
  645   Friday, March 09, 2018, 08:57 Carla Babcock       HV test with electronics moved to rackFirst attachment: BIAS/EE/EZL = 63.25/-1.5/31
So far no issues.
Second attachment: BIAS/EE/EZL =
 09032018_830.PNG09032018_835.PNG09032018_850.PNG09032018_855.PNG 
  647   Monday, March 12, 2018, 10:44 Carla Babcock       Bringing up HV with gas onPressure:
Previous HV tests done at 2e-7
pressure.
Current pressure 1.1e-6
 8x 
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