 Thu May 31 07:11:05 2007, Doug Preddy, Quench Recovery, switched to parallel cold return
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switched to parallel cold return earlier this morning. Vacuum is 5 x 10-5. |
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Thu May 31 11:51:49 2007, Doug Preddy, Quench Recovery, Switched to series mode
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Thu Jun 14 00:10:10 2007, Doug Preddy, Quench Recovery, recovering from earlier quench
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Solenoid quenched on power lead temperature last night at about 6:00. I
restarted flow to the solenoid in parallel cold return. Switched to series
mode and am building liquid. |
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Tue Jun 19 21:15:41 2007, Doug Preddy, Quench Recovery, Today's quench
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power lead temps caused a quench at 8:30 this morning. Recovery of system
and flow to solenoid was started by 11:00. Solenoid was switched to series
cold at 3:00. Solenoid and power leads were cold at ~6:30. power supply
was to be energized by experimenters. |
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Wed Jul 4 11:13:12 2007, Doug Preddy, Quench Recovery, test
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This is a test to make sure the e-mail works. |
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Sat Jul 28 15:45:17 2007, Doug Preddy, Quench Recovery, quench recovery
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The solenoid tripped off this morning due to pwer lead over temp. The
compressor was also off. I restarted this morning at about 8:15 in
parallel cold return. Switching to series mode at 3:40. |
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Sat Jul 28 22:30:13 2007, Doug Preddy, Quench Recovery, quench again
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recovered system and energized solenoid at about 6:00 this evening.
At 9:30 power lead temps quenched solenoid again. MV52 stuck open during
start-up. |
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Sun Jul 29 04:58:27 2007, Doug Preddy, Quench Recovery, Energizing solenoid
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LHe level~50%. Still have a slight ripple in the power leads, but they are
cold enough to power the solenoid. LHe_in varies between 10.7K - 11.3K. |
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Mon Aug 6 08:41:31 2007, Doug Preddy, Quench Recovery, Cold box trip at 6:00
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compressor off due to cold box trip at 6:00 this morning. Restarted system
and started flow to solenoid in parallel cold return. |
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Fri Oct 5 10:25:43 2007, Doug Preddy, Quench Recovery, Unknown quench 2
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Kevin and I were at the Sulzer panel when the system quenched 2. No
obvious reasons. Restarted the system. |
Fri Oct 5 13:25:41 2007, Doug Preddy, Quench Recovery, funny graph 
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There was a fluctuation of the positive lead temp with no flow going to
the power leads. |
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Tue Oct 9 12:58:22 2007, Doug Preddy, Quench Recovery, Solenoid Quench 2
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Refrigeration sytem shut off at ~ 12:30 today. No apparent reason. Only
light on was a cold box fault.
Restarted in parallel cold return mode. |
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Tue Oct 9 13:16:44 2007, Doug Preddy, Quench Recovery, switched to series mode
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Thu Nov 8 09:28:53 2007, Doug Preddy, Quench Recovery, started compressor
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And started flow to coldbox,solenoid in parallel warm return.
Tuesday evening theree was a 2 hour power outage 19:00- 21:00. No call
made to M9 operator.
Wednesday tried to recover vacuum. Started cool down Thursday morning. |
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Fri Nov 9 07:37:44 2007, Doug Preddy, Quench Recovery, switched to series mode
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switched to series mode. |
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Fri Nov 9 14:50:03 2007, Doug Preddy, Quench Recovery, Solenoid cold
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Solenoid cold. Added two bottles of helium. Allowing to stablize. Will
ramp power supply in half an hour. |
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Mon Nov 19 02:58:44 2007, Doug Preddy, Quench Recovery, Solenoid quenched on power lead over temperature
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I received a page at 1:30 this morning. The power lead temperatures were
climbing. Cycling CV142 did not fix the problem. The solenoid quenched at
1:50.
Restarted flow at 2:45 in parallel cold return. |
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Mon Nov 19 04:30:47 2007, Doug Preddy, Quench Recovery, switched to series mode
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Mon Dec 3 14:59:58 2007, Doug Preddy, Quench Recovery, Not really a quench recovery, But...
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Not really a quench recovery, but...I wanted to send this out via e-mail.
The contactor for the compressor building fan failed recently. Randy is
looking after it, but parts will have to be ordered. The big door should
stay open until the fan is running again.
Other than the fan, the rest of the system weathered the weather okay.
It's up and running until Wednesday morning. After maintenance day, we
should ramp down the solenoid power supply and leave the refrigerator
running. We can do some training and maintenance at this time. I would
also like to keep it cold until blocks can be removed so we can pump out
the cold box. |
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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. |