M9sol Logbooks Solenoid Daily log
  Solenoid logbook, Page 9 of 15  ELOG logo
New entries since:Wed Dec 31 16:00:00 1969
ID Date Authordown Operational Mode Subject
  136   Thu Jul 20 00:52:13 2006 Doug PreddyQuench RecoveryT1 frozen
T1 will not spin up. Warming up cold box.
  137   Thu Jul 20 02:59:06 2006 Doug PreddyQuench RecoveryT1 still not starting
I will leave the cold box to warm overnight and try it again in the morning.
  138   Thu Jul 20 08:18:31 2006 Doug PreddyQuench RecoveryT1 started
Started flow to turbines. Both started. T1 seems a bit slow. HIC110 at 0.85 
SI110 = 4100.
Cool down started.
  143   Fri Jul 21 07:39:37 2006 Doug PreddyQuench RecoveryCool down continues
Raised PIC229 to 11Bar. Started to close HIC155. Cooling rates improve.
  144   Fri Jul 21 14:08:04 2006 Doug PreddyQuench Recoveryswitch to series mode
Coils temps <10K.Switching to series mode.
  146   Fri Jul 21 23:36:21 2006 Doug PreddyQuench RecoveryFinal cooldown problems
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.
  148   Fri Jul 28 20:39:40 2006 Doug PreddyQuench RecoveryRestarting refrigerator
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.
  149   Sat Jul 29 05:30:28 2006 Doug PreddyQuench Recoveryswitched to series mode
Temps bottomed out at ~16K. Switching to series mode.
  150   Sat Jul 29 09:38:06 2006 Doug PreddyQuench Recoverypower leads cooled
opened power lead flow about 40 minutes ago. ~12K will let them stablize. 
LHE level >20%
  151   Tue Aug 8 07:27:49 2006 Doug PreddyQuench RecoverySolenoid Quench at about 6:00 this morning
No indication of problem. Turbines still running, but no flow to solenoid. 
Started flow. Solenoid ~20K.
  154   Wed Aug 9 07:50:49 2006 Doug PreddyQuench RecoverySwitched to series mode.
Cool down continues.
  155   Thu Aug 10 08:33:44 2006 Doug PreddyNormal RunningRunning low on helium
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.
  158   Tue Aug 15 08:45:56 2006 Doug PreddyQuench Recoveryrestarted the compressor
Solenoid tripped off Sunday. Restarted compressor and cool down of cold box.
  160   Thu Aug 17 08:04:44 2006 Doug PreddyQuench RecoverySolenoid tripped at about 3:00 this morning
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.
  162   Wed Oct 4 07:29:04 2006 Doug PreddyStart UpStarting cool down
Started compressor yesterday with flow through the purifier overnight.
Starting tubines this morning in parallel warm return
  164   Thu Oct 5 10:26:26 2006 Doug PreddyStart Upswitched to parallel cold return
  165   Thu Oct 5 11:51:53 2006 Doug PreddyStart UpAdde 2 bottles UHP Helium
Valved off purifiers, but left LN2 on.
  166   Thu Oct 5 14:53:54 2006 Doug PreddyStart UpSwitched to series mode
  173   Thu Oct 26 08:18:10 2006 Doug PreddyQuench Recoveryswitched to series mode
Switched to series mode at about 7:45.
  174   Thu Oct 26 11:45:22 2006 Doug PreddyQuench RecoverySolenoid cold
power leads cold 50% liquid.
Turning on power supply
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