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ID Date Author Operational Mode Subject Text   140   Thu Jul 20 13:21:57 2006 Willy Andersson Quench Recovery started // warm return flow. TIC121 was down to 27K warm return valves were wide open opened supply valves CV143 and CV146.      141   Thu Jul 20 13:27:21 2006 Willy Andersson Quench Recovery cold return mode continues... cr_c1 and cr_12 are both at about 45K and heading slowly down, so the  gamble of going to // cold return worked.      142   Thu Jul 20 13:34:26 2006 Willy Andersson Quench Recovery cold return mode continues... Even though cr_c1 and cr_c12 have begun to tick down, cr_c7 and cr_c6 are  actually ticking up. This is probably a wave      143   Fri Jul 21 07:39:37 2006 Doug Preddy Quench Recovery Cool down continues Raised PIC229 to 11Bar. Started to close HIC155. Cooling rates improve.      144   Fri Jul 21 14:08:04 2006 Doug Preddy Quench Recovery switch to series mode Coils temps <10K.Switching to series mode.      145   Fri Jul 21 17:18:19 2006 Willy Andersson Quench Recovery Opened HIC142 fully open Power leads have flatlined but still building LHe level.      146   Fri Jul 21 23:36:21 2006 Doug Preddy Quench Recovery Final cooldown problems 80K shield is down to <60K Liquid level not building. Power leads rippling  and warming. T1 inlet 85K with 10%heater      147   Sat Jul 22 06:34:14 2006 Experimentor Quench Recovery looking good Donald Arseneau reporting. It is looking pretty good, so I came back      148   Fri Jul 28 20:39:40 2006 Doug Preddy Quench Recovery Restarting refrigerator Solenoid quenched at about 6:00 tonight. I restarted the compressor, then the cold box and turbines. When cold box       149   Sat Jul 29 05:30:28 2006 Doug Preddy Quench Recovery switched to series mode Temps bottomed out at ~16K. Switching to series mode.      150   Sat Jul 29 09:38:06 2006 Doug Preddy Quench Recovery power 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 Preddy Quench Recovery Solenoid Quench at about 6:00 this morning No indication of problem. Turbines still running, but no flow to solenoid.  Started flow. Solenoid ~20K.      152   Wed Aug 9 06:44:58 2006 Willy Andersson Quench Recovery // cold mode cooling continues. After restarting flow to the solenoid yesterday in // cold return mode  TIC121 just refused to go lower than about      153   Wed Aug 9 06:59:43 2006 Willy Andersson Quench Recovery more // cold return stuff About 21:00 last night the solenoid temps had not changed much, pretty well  flat lined. I guess my reducing CV155 stalled      154   Wed Aug 9 07:50:49 2006 Doug Preddy Quench Recovery Switched to series mode. Cool down continues.      156   Thu Aug 10 16:33:11 2006 Willy Andersson Quench Recovery Flow to solenoid tripped on powerlead temperature. Power lead temps were drifting up, tried to tweak TIC121 and HIC141 to  unstall powerlead flow. Got quench. Restarted      157   Thu Aug 10 20:26:09 2006 Willy Andersson Quench Recovery solenoid energized Powerleads seem stable.      158   Tue Aug 15 08:45:56 2006 Doug Preddy Quench Recovery restarted the compressor Solenoid tripped off Sunday. Restarted compressor and cool down of cold box.      159   Tue Aug 15 15:39:27 2006 Willy Andersson Quench Recovery switched to parallel cold return Return flow temps from solenoid about 40K, TIC121 at about 40K so switching  to //cold return.      160   Thu Aug 17 08:04:44 2006 Doug Preddy Quench Recovery Solenoid tripped at about 3:00 this morning restarting system. Compressor would not start. Idid not see anything that would not let it

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