 Thu Jul 20 00:52:13 2006, Doug Preddy, Quench Recovery, T1 frozen
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| T1 will not spin up. Warming up cold box. |
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Thu Jul 20 02:59:06 2006, Doug Preddy, Quench Recovery, T1 still not starting
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| I will leave the cold box to warm overnight and try it again in the morning. |
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Thu Jul 20 08:18:31 2006, Doug Preddy, Quench Recovery, T1 started
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Started flow to turbines. Both started. T1 seems a bit slow. HIC110 at 0.85
SI110 = 4100.
Cool down started. |
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Fri Jul 21 07:39:37 2006, Doug Preddy, Quench Recovery, Cool down continues
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| Raised PIC229 to 11Bar. Started to close HIC155. Cooling rates improve. |
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Fri Jul 21 14:08:04 2006, Doug Preddy, Quench Recovery, switch to series mode
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| Coils temps <10K.Switching to series mode. |
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Fri Jul 21 23:36:21 2006, Doug Preddy, Quench Recovery, Final cooldown problems
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80K shield is down to <60K Liquid level not building. Power leads rippling
and warming. T1 inlet 85K with 10%heater load.
Lowered the set point of TI121 to 17K. Shut off flow to the 80K shield to
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Fri Jul 28 20:39:40 2006, Doug Preddy, Quench Recovery, Restarting refrigerator
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Solenoid quenched at about 6:00 tonight.
I restarted the compressor, then the cold box and turbines. When cold box
was at 25K I started flow to the solenoid in parallel cold return. |
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Sat Jul 29 05:30:28 2006, Doug Preddy, Quench Recovery, switched to series mode
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| Temps bottomed out at ~16K. Switching to series mode. |
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Sat Jul 29 09:38:06 2006, Doug Preddy, Quench Recovery, power leads cooled
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opened power lead flow about 40 minutes ago. ~12K will let them stablize.
LHE level >20% |
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Tue Aug 8 07:27:49 2006, Doug Preddy, Quench Recovery, Solenoid Quench at about 6:00 this morning
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No indication of problem. Turbines still running, but no flow to solenoid.
Started flow. Solenoid ~20K. |
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Wed Aug 9 07:50:49 2006, Doug Preddy, Quench Recovery, Switched to series mode.
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| Cool down continues. |
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Thu Aug 10 08:33:44 2006, Doug Preddy, Normal Running, Running low on helium
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Temperture okay, but there are fluctuation in the power leads. PIC229 is
trying to charge. The buffer tank pressure is just >0 psi. I will lower the
liquid level to 40% to allow some helium to boil off into the buffer tank. |
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Tue Aug 15 08:45:56 2006, Doug Preddy, Quench Recovery, restarted the compressor
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| Solenoid tripped off Sunday. Restarted compressor and cool down of cold box. |
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Thu Aug 17 08:04:44 2006, Doug Preddy, Quench Recovery, Solenoid tripped at about 3:00 this morning
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restarting system.
Compressor would not start. Idid not see anything that would not let it
start. Pushed rest button upstairs, and reset contactor. Compressor started.
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Wed Oct 4 07:29:04 2006, Doug Preddy, Start Up, Starting cool down
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Started compressor yesterday with flow through the purifier overnight.
Starting tubines this morning in parallel warm return |
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Thu Oct 5 10:26:26 2006, Doug Preddy, Start Up, switched to parallel cold return
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Thu Oct 5 11:51:53 2006, Doug Preddy, Start Up, Adde 2 bottles UHP Helium
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| Valved off purifiers, but left LN2 on. |
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Thu Oct 5 14:53:54 2006, Doug Preddy, Start Up, Switched to series mode
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Thu Oct 26 08:18:10 2006, Doug Preddy, Quench Recovery, switched to series mode
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| Switched to series mode at about 7:45. |
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Thu Oct 26 11:45:22 2006, Doug Preddy, Quench Recovery, Solenoid cold
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power leads cold 50% liquid.
Turning on power supply |