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ID Date Author Operational Mode Subject
  286   Fri Nov 12 16:54:50 2010 Doug PreddyNormal RunningSolenoid ramped up
  285   Thu Nov 11 15:46:40 2010 Doug PreddyOtherswitched to parallel cold return

At 14:45.

  284   Mon Aug 9 14:27:12 2010 Doug PreddyShut DownHelium plant shut down
  283   Mon Jun 7 09:24:47 2010 Doug PreddyQuench Recoverystarted flow to power leads
  282   Tue May 18 15:04:36 2010 Kevin TrithardtMaintenanceSolenoid ramping up
  281   Thu May 13 14:37:13 2010 Doug PreddyQuench Recoveryswitching to series mode.
  280   Thu May 13 07:39:55 2010 Doug PreddyQuench Recoverysolenoid quench last night

Solenoid quenched on power lead temps last evening. I am recovering it in parallel cold return mode. C12~60K C1~50K.

  279   Mon May 3 07:49:54 2010 Doug PreddyQuench RecoverySolenoid quench Saturday

Solenoid quenched at ~13:30 Saturday. Kevin came in later in the day to recover it. System was in all around mode, no flow to solenoid. Discharge pressure went over 12 bar while starting flow and tripped the compresswor. After restart solenoid was cooling well.

Monday morning 7:30 I opened CV155 to increase the cooldown rate.

  278   Fri Apr 9 16:07:28 2010 Doug PreddyStart Upflow to power leads started
  277   Fri Apr 9 07:34:55 2010 Doug PreddyQuench Recoveryswitched to parallel cold return

Switched to parallel cold return at about 7:30 this morning

 

  276   Thu Apr 1 11:57:55 2010 Doug PreddyStart Upstarted flow to power leads

Solenoid cold. Buffer tank pressure ~3psi, so Kevin will add a bottle of helium. Started flow to power leads at 11:45

  275   Mon Mar 29 09:25:52 2010 Kevin TrithardtStart UpStarted cool down this morning
  274   Wed Mar 24 08:30:33 2010 Doug PreddyStart UpStart up

Compressor started yesterday afternoon. Pumping out solenoid overnight. Cold box vacuum good. circulating helium to solenoid in Parallel warm mode, CV142 open. Purifier running.

  273   Mon Oct 5 11:54:58 2009 Doug PreddyNormal RunningSwitched TIC121 into auto mode
  272   Tue Jul 14 15:28:36 2009 Doug PreddyQuench RecoverySolenoid ramped up

The solenoid is cold and I have started to ramp up the power supply. Some slight ripples in the power leads, but they are dieing out. Liquid level is a lot more stable this time.

  271   Fri Jul 10 01:10:59 2009 Doug PreddyQuench Recoveryswitch to parallel warm return
  270   Fri Jul 10 00:34:03 2009 Doug PreddyQuench Recoverysolewnoid quench due to power bump

Solenoid quench due to power bump caused by an airplane crash in Richmond at ~ 22:00. Compressor off. Water pump off. Restarted compressor at ~ 11:30. Cooling solenoid in parallel cold return mode by 12:15.

  269   Wed May 27 15:01:34 2009 Doug PreddyQuench Recoverypower leads

Power leads are cold. There is still a small ripple. The power supply can be ramped up as soon as the ripples die out.

  268   Wed May 27 13:37:22 2009 Doug PreddyQuench Recoveryswitch to series mode

Switched to series mode at ~11:00. Built liquid to 55% by 13:30. Started flow to the power leads.

  267   Wed May 27 08:06:00 2009 Doug PreddyQuench RecoverySolenoid quenched at 5:00

The solenoid quenched at 5:00 this morning due to power lead temps. The temps started oscillating about 10 minutes before the trip. The compressor and the cold box stayed on. The flow to the solenoid was stopped.

The solenoid flow was started in parallel cold return at ~7:20.

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