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ID Date Author Operational Mode Subject Text   2   Fri Dec 19 13:07:25 2003 Willy Andersson Maintenance To-Do list for M9SOL I had distributed this list by email earlier this month. I have added a few items at the bottom. I am posting it      11   Wed Apr 21 09:57:59 2004 Willy Andersson Start Up System status Buffer tank pressure is down to about 6 psig. Too low to keep up with liquefaction requirements to build LHe      14   Sun Apr 25 21:41:00 2004 Willy Andersson Quench Recovery Trip on PL Temp. Got pager call at 16:20 this afternoon. Solenoid had tripped on PL  temperature. Arrived at about 17:00. Did      26   Wed May 5 23:57:38 2004 Willy Andersson Quench Recovery Powerleads warming up again. Got a page from Don Flemming at about 18:50 wondering why the power lead temperatures were rising. See attachment      27   Thu May 6 09:32:13 2004 Willy Andersson Quench Recovery Additional notes from last night power lead problems. When performing last nights refrigerator adjustments I also increased the  compressor discharge pressure to 11.25 barA.      29   Fri Jun 25 12:36:04 2004 Willy Andersson Quench Recovery Compressor unloaded etc. At about 09:30 this morning I noticed the sound coming from the compressor  building seemed louder than usual. After      30   Fri Jun 25 14:20:58 2004 Willy Andersson Quench Recovery Switch to series mode At about 14:00 solenoid temps dipping below 8 K. Trace of LHe level (dense  gas) starting to show. Switching to series      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      40   Sat Aug 7 22:37:04 2004 Willy Andersson Quench Recovery Compressor tripped off. Got a call at about 10:00 this morning, the whole system had tripped off.  No power bumps or other disturbances. When      41   Sat Aug 7 23:40:47 2004 Willy Andersson Quench Recovery Energizing solenoid 23:39 Powerleads cold, LHe level over 40% and rising. Energizing solenoid  to 500 Amps, ramp rate 60. Checking compressor      47   Thu Sep 2 21:58:34 2004 Willy Andersson Quench Recovery Switch to series cooling Solenoid had tripped on powerlead overtemp at about 09:00 this morning.  Doug recovered the system to // cooling.      86   Sun Nov 28 10:15:18 2004 Willy Andersson Quench Recovery Powerlead quench ? Got page very early this morning. Couldn't come in til 08:30. System was  in idle running mode and someone had reset      101   Thu Jun 9 21:41:25 2005 Willy Andersson Quench Recovery Trying to achieve stable cooling. From about 08:00 to 15:00 See Doug's previous entry for quench recovery      107   Tue Jul 19 16:13:32 2005 Willy Andersson Quench Recovery switch to series mode CR_6KS_M down to 11 K. Switched to series mode. Started small flow to power leads to get      108   Tue Jul 19 18:09:56 2005 Willy Andersson Quench Recovery Quench II Machine trip just as I was exiting the TRIUMF gate. QRL said cold box fault  as did red lite on compressor. At cold box      109   Sun Aug 14 10:03:13 2005 Willy Andersson Normal Running System stable No experiment running in M9B. Solenoid current is zero and power supply      110   Mon Oct 31 07:48:57 2005 Willy Andersson Quench Recovery what a fine entry Keep IT safe boys      111   Wed Nov 2 10:17:27 2005 Willy Andersson Start Up M9B helium refrigerator and solenoid cooldown Started M9B MYCOM helium compressor circulating helium through system last  Friday. Right hand purifier was regenerated      125   Tue Jun 13 15:52:46 2006 Willy Andersson Quench Recovery Doug has reduced and now closed CV155. Now in full // cold return mode. Had just talked with Curtis, He said thta he has already informed the       126   Tue Jun 13 16:04:33 2006 Willy Andersson Quench Recovery TIC 121 set to auto mode

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