 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
try and warm them. Turbine 1 inlet temp dropping (83K)
Power leads cooled and stablized, coil temps came down. Leaving it for 1/2
hour to evaluate. |
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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.
preparing to start flow to solenoid in // cold return. |
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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 |