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ID Date Author Operational Mode Subject Text   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      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.      144   Fri Jul 21 14:08:04 2006 Doug Preddy Quench Recovery switch to series mode Coils temps <10K.Switching to series mode.      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.      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      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.      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.      139   Thu Jul 20 11:01:09 2006 Willy Andersson Quench Recovery Opened up warm return valves CV151 and CV153 Mu2 pressure was just about at trip point due to trapped volume of helium  warming. So opened up warm returns to bleed      138   Thu Jul 20 08:18:31 2006 Doug Preddy Quench Recovery T1 started Started flow to turbines. Both started. T1 seems a bit slow. HIC110 at 0.85  SI110 = 4100.      137   Thu Jul 20 02:59:06 2006 Doug Preddy Quench Recovery T1 still not starting I will leave the cold box to warm overnight and try it again in the morning.      136   Thu Jul 20 00:52:13 2006 Doug Preddy Quench Recovery T1 frozen T1 will not spin up. Warming up cold box.      135   Thu Jul 20 00:25:16 2006 Doug Preddy Quench Recovery Solenoid quenched @ 11:15 Solenoid Quenched on C1 temp. It went above 5K. Shut off compressor.  Restarting system @ 12:15      134   Thu Jul 6 15:04:17 2006 Doug Preddy Normal Running test test      133   Thu Jul 6 15:00:15 2006 Doug Preddy Normal Running test        132   Mon Jul 3 23:01:34 2006 Doug Preddy Quench Recovery power lead warming/ripples caused quench power lead warming/ripples caused quench at 18:45 today. Compressor stayed  on, but flow to solenoid stopped.      131   Fri Jun 30 11:17:57 2006 Doug Preddy Normal Running Solenoid recovered Tuesday night. June 27, 2006, the solenoid quenched for no apparent  reason. It was restarted Wednesday morning.      130   Fri Jun 30 11:13:00 2006 Doug Preddy Normal Running E-log is back up and running I would have made an entry when it died, but-----      129   Fri Jun 16 08:12:04 2006 Doug Preddy Normal Running LI108 indicates high on EPICS screen LI108 indicates high on EPICS screen (150%)  Controller shows ~64%      128   Wed Jun 14 16:27:01 2006 Willy Andersson Quench Recovery Energized solenoid Powerleads appear stable.      127   Wed Jun 14 10:35:30 2006 Willy Andersson Quench Recovery Switched to series cooling. Had system in //return cooling overnight with small flow to keep power  leads cool. Switched to series mode about

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