 Wed Dec 10 15:44:58 2008, Doug Preddy, Maintenance, Repairs to solenoid power supply
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Klaus and company pulled the ramp rate card out of the solenoid power supply. Operational checks were done and the rate switch was cleaned. The card was
reinserted and the ramp rate was checked. The power supply seems to ramp at a proper rate in all positions. ***Note*** The output voltage of the power
supply is proportional to the ramp rate. The faster the ramp rate the higher the output voltage. |
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Wed Dec 10 15:41:04 2008, Doug Preddy, Shut Down, shuttting down solenoid
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| shuttting down solenoid for winter shutdown. |
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Wed Nov 5 16:33:52 2008, Doug Preddy, Normal Running, sbplc light out
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| On main menu the sbplc light was black. All vacuum systems looked good, but there was no control of any device. Jane reset the IOC. It is hosted by sundance. |
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Sun Oct 5 18:54:27 2008, Doug Preddy, Quench Recovery, Solenoid Quench ~16:30
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| Restarted compressor and flow to coldbox by 18:30 |
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Sun Oct 5 11:12:48 2008, Doug Preddy, Normal Running, M9B:V1 interlocks and a IOC crash
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M9A:V1 was removed this shutdown. It's "in" limit is required to allow M9B:V1 to be opened. I have bypassed the interlocks on M9B:V1 until the M9A:V1 limits
can be jumpered. Don Dale and George Clark have been informed.
Also an IOC crashed so the data pages were not updating. Evgeny rebooted the IOC. All is
now fixed. |
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Fri Sep 26 09:50:18 2008, Doug Preddy, Quench Recovery, started flow in parallel cold return mode
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Fri Sep 26 09:45:18 2008, Doug Preddy, Quench Recovery, Solenoid quenched at 7:50
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| Compressor on. Turbines started. Vacuum system recovering. |
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Fri Sep 26 09:44:25 2008, Doug Preddy, Maintenance, Water flow interlock restored
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| yesterday |
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Tue Sep 9 15:04:23 2008, Doug Preddy, Maintenance, Jumpered interlock for diff pump water flow
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| Jumpered interlock for diff pump water flow in Proteus box. |
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Thu Sep 4 10:02:55 2008, Doug Preddy, Normal Running, ramping down solenoid
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| Solenoid power supply will be turned off for Fall shutdown. |
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Sun Aug 24 06:45:14 2008, Doug Preddy, Quench Recovery, switch to series mode
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Sat Aug 23 17:02:38 2008, Doug Preddy, Quench Recovery, Solenoid quenched
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The solenoid quenched this afternoon at ~12:30. The compressor shut down. Fault lights were cold box trip.
Restarted the compressor by 3:30 and started
flow to the solenoid by 4:15.
Peter Yandon came down with Ops' radio to investigate the radios may trip the solenoid. When the radio is keyed the vacuum
guages jump. CG1, CG5 and the pirani gauges. This would trip of the refrigerator. More investigation to happen tomorrow and on maintenance day. |
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Sat Jul 26 01:29:21 2008, Doug Preddy, Quench Recovery, power leads
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ops will monitor liquid level. When it's at 60% they will come down and open the power lead valve. When the temperature ripples die out the solenoid can
be energized. |
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Sat Jul 26 01:06:04 2008, Doug Preddy, Quench Recovery, Refrigerator in series mode
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| Switched to series mode. Solenoid ~8K, starting to build liquid. |
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Fri Jul 25 21:48:15 2008, Doug Preddy, Quench Recovery, another quench
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System was stable and solenoid ramped up at 4:00 today. At about 7:30 it tripped off again. I came in and restarted the compressor and am now cooling in
parallel cold return mode. Solenoid is at ~30K. I talked to Kevin and he will get the power leads on tomorrow morning. Once they are stable the power supply
can be ramped up.
I phoned Curtis, but there was no answer (he may be on holidays??) |
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Thu Jul 24 16:28:50 2008, Doug Preddy, Quench Recovery, power bump
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There was a power bump at ~15:00 today. All mseon hall cooling water went off. Compressor tripped. Main magnet went off.
Restarted compressor after water
pumps came back on. Started flow to the cold box. Compressor outlet pressure went >12 Bar and tripped of the compressor. Restarted again and am now cooling
in parallel cold return. Solenoid ~25K. |
Tue Jul 15 08:47:13 2008, Doug Preddy, Normal Running, Screen grab of normal running 
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| Solenoid was recovered on Sunday July 13. The power leads started to ripple slightly this morning, so I cycled HIC142. No real change. |
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Sun Jul 13 20:17:24 2008, Doug Preddy, Other, Helium refrigerator problems
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In early June the helium compressor was running with the solenoid cold. A vavlve broke off at the suction side of the compressor. The entire helium inventory
was lost. The cold box tripped off, but the compressor did not. It ran for ~ 2 hours before I came in and shut the system down. The valve was repairedby
Kevin T and Neil Wong. We ran hot (>100C) nitrogen through the fourth adsorber for one week. The solenoid and cold box were allowed to warm above 273C. |
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Mon Apr 28 09:03:22 2008, Doug Preddy, Normal Running, power leads warmed during weekend
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The power lead temperatures suddenly rose on Sunday morning. No rippling occured before the woarm up.
I shut flow off this morning for about 10 minutes
(until the LHe in went up to 30K) and then open the flow back up. The temperature seem to be recovering. |
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Thu Apr 17 13:52:25 2008, Doug Preddy, Start Up, switched to series mode at 9:30 this morning
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switched to series mode at 9:30 this morning. Added two bottles of helium gas.
Started flow to power leads. |