| ID |
Date |
Author |
Target/No.# |
Source |
Station |
Module |
Target Oven W.O# |
Heat Shield W.O# |
Status |
Subject |
Text |
 |
|
629
|
Wednesday, February 07, 2018, 08:46 |
Aaron Schmidt | | | | | | | | BIAS Power supply installation | Wednesday, February 07, 2018, 08:40: A
75 kV Glassman power supply was installed
in the rack for use in further HV testing. |
|
|
630
|
Thursday, February 08, 2018, 14:44 |
Carla Babcock | | | | | | | Done | Conditioning station power supply integrated into EPICS | The 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 behaviour | Thursday, 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 interlock | Friday, 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 supply | 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 ). |
|
|
634
|
Tuesday, February 13, 2018, 16:47 |
Carla Babcock | | | | | | | | Ramping to 63kV - some sparks | Sparks 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 again | 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 |
|
|
636
|
Monday, February 19, 2018, 08:30 |
Carla Babcock | | | | | | | | TMSTP6 off | Found 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 shield | 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 |
|
|
639
|
Friday, February 23, 2018, 08:50 |
Aaron Schmidt | | | | | | | | New Al Corona | Friday, February 23, 2018, 08:50 |
|
|
640
|
Monday, February 26, 2018, 09:13 |
Carla Babcock | | | | | | | | Running list of changes to the ISAC test stand for >60kV operation | 1. Al corona shield installed over end
of the HV duct to suppress discharges from
the sharp edge of the duct. |
6x |
|
641
|
Wednesday, February 28, 2018, 11:50 |
Aaron Schmidt | | | | | | | | HV Test Np | New parts installed. Corona Shield, brackets,
and board/spark gap orientation.
Wednesday, February 28, 2018, 11:48: |
|
|
642
|
Thursday, March 01, 2018, 10:05 |
Carla Babcock | | | | | | | | HV tests with corona discharge problems solved | Turning up bias, no corona discharge at
60kV but a spark at 61.5kV bias, 31kV EZL,
-800V EE |
|
|
643
|
Tuesday, March 06, 2018, 10:55 |
Carla Babcock | | | | | | | | Trying HV without electronics | I have removed the resistor/varistor combinations
that go between the poles of the target and
tube heaters, and between those two supplies. |
|
|
644
|
Thursday, March 08, 2018, 17:47 |
Carla Babcock | | | | | | | | Change of electronics on target and tube power supplies | The resistor/varistor combinations across
the target + / -, tube + / - and target-
/ tube + have been remade and moved to the |
|
|
645
|
Friday, March 09, 2018, 08:57 |
Carla Babcock | | | | | | | | HV test with electronics moved to rack | First attachment: BIAS/EE/EZL = 63.25/-1.5/31
So far no issues.
Second attachment: BIAS/EE/EZL = |
|
|
646
|
Monday, March 12, 2018, 10:07 |
Aaron Schmidt | | | | | | | | HV Test w-gas | Monday, March 12, 2018, 09:45: Gas lines
opened. Leak rate set. Vacuum @ 1.16e-06T
Monday, March 12, 2018, 10:00: RGA |
|
|
647
|
Monday, March 12, 2018, 10:44 |
Carla Babcock | | | | | | | | Bringing up HV with gas on | Pressure:
Previous HV tests done at 2e-7
pressure.
Current pressure 1.1e-6 |
8x |
|
650
|
Tuesday, March 20, 2018, 09:14 |
Aaron Schmidt | | | | | | | Problems/Solutions | Optics issue | Tuesday, March 20, 2018, 09:11: TMS:Q5
& TMS:Q2 controllers require repair.
Unable to hold a negative voltage. |
|