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ID Date Author Operational Mode Subject Text   208   Thu Jul 5 11:01:47 2007 Kevin Trithardt Other Current lead warm up Due to curent lead temperature occilation Doug recommended warming up the  current leads.      241   Wed Nov 28 15:07:08 2007 Kevin Trithardt Other power lead regeneration Power leads cold again, power supply ramping up.      249   Sun Jul 13 20:17:24 2008 Doug Preddy Other Helium refrigerator problems In early June the helium compressor was running with the solenoid cold. A vavlve broke off at the suction side of the compressor. The      285   Thu Nov 11 15:46:40 2010 Doug Preddy Other switched to parallel cold return At 14:45.      12   Thu Apr 22 10:39:16 2004 Doug Preddy Normal Running Yesterday Added two bottles of UHP helium to buffer tank. Had no liquifation rate, so optimized Ti121      13   Fri Apr 23 09:19:30 2004 Doug Preddy Normal Running CV211 PIC 229 was down to 10.8 bar this morning. PIC 229 was trying to open CV211  to charge the system. I realized that in      17   Tue Apr 27 09:03:18 2004 Doug Preddy Normal Running Power leads Power leads are being monitored with the strip tool graphs. I saw the temps  go from having a ripple to almost no ripple,      18   Wed Apr 28 09:30:09 2004 Doug Preddy Normal Running power leads again Same story as yesterday. Ripples dieing out, flows down to <200 mm, temps  increasing. Turned HIC 142 down to 0.4 then      21   Tue May 4 11:20:57 2004 Doug Preddy Normal Running power leads going unstable power lead ripples increased over last couple of days. They are quickly  dieing out now and the temps are startint      22   Tue May 4 11:26:38 2004 Doug Preddy Normal Running power leads Power cycled HIC 142 with solenoid power at 400 amps. Flows > 240mm and  temps have dropped.      25   Wed May 5 12:13:51 2004 Doug Preddy Normal Running power leads cold should be ready to run.      31   Tue Jun 29 14:59:46 2004 Willy Andersson Normal Running Removed jumper on vacuum controller. Tuesday 14:55 Removed jumper on back of PIC 901. This jumper      43   Tue Aug 24 12:09:50 2004 Doug Preddy Normal Running The past few days The solenoid has been re-started as of August 19. It was cooled down and  energized over the weekend. Sunday night      44   Wed Aug 25 07:47:05 2004 Doug Preddy Normal Running Power lead flow The power lead flows had dropped to 210 mm this morning. I increased HIC142  from 0.8 to 0.83. The flows are back to <250      45   Wed Aug 25 12:52:53 2004 Doug Preddy Normal Running power lead ripple Lhe ripple has started. 10.9-11.4K PL-Pos also has a smaller ripple. Both  flows down to 230mm. Cycled HIC 142 and the      46   Sun Aug 29 14:39:19 2004 Doug Preddy Normal Running Power lead ripple The LHe in and PL-neg temps have been building up a ripple over the last  few days. Curtis cycled HIC142 Friday evening      73   Mon Oct 25 15:44:15 2004 Doug Preddy Normal Running Power lead temps starting to ripple Power lead temps starting to ripple at a 1.5min period. PL flows are  both>250 mm.      74   Tue Oct 26 09:45:24 2004 Doug Preddy Normal Running power leads warming Flow to power leads dropped to <80 mm. Cycled HIC142. Temps dropping, flows  >250.      75   Fri Oct 29 14:25:23 2004 Doug Preddy Normal Running power lead flows dropping Flow is down to <190 mm. temps are starting to climb. Cycled HIC142      76   Mon Nov 1 07:17:44 2004 Doug Preddy Normal Running power lead flow gone bad power temps as follows: LHE_IN 23 PL_POS 36

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