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ID Date Author Operational Mode Subject Text   240   Tue Nov 27 21:02:08 2007 Doug Preddy Normal Running power lead ripples power leads were oscillating tonight. John K. came down and cycled CV142.  (Thanks John!) Temps settling out.      242   Mon Dec 3 14:59:58 2007 Doug Preddy Quench Recovery Not really a quench recovery, But... Not really a quench recovery, but...I wanted to send this out via e-mail.  The contactor for the compressor building      243   Tue Apr 1 15:17:06 2008 Doug Preddy Start Up Starting up vacuum systems Monday afternoon there was no control of the vacuum system. The controls were working, but no output to devices. The "output" breaker      244   Wed Apr 16 15:12:01 2008 Doug Preddy Normal Running graphs to load There are three strip tools saved: coils powerlead startup      245   Wed Apr 16 15:15:44 2008 Doug Preddy Start Up refrigerator started Turned on compressor last Tuesday. Ran purifier until today. Final value 0.15ppm. Started cool down yesterday. Switched into parallel      246   Wed Apr 16 16:51:16 2008 Doug Preddy Start Up switched to parallel cold return        247   Thu Apr 17 13:52:25 2008 Doug Preddy Start Up switched to series mode at 9:30 this morning switched to series mode at 9:30 this morning. Added two bottles of helium gas.  Started flow to power leads.      248   Mon Apr 28 09:03:22 2008 Doug Preddy Normal Running power leads warmed during weekend The power lead temperatures suddenly rose on Sunday morning. No rippling occured before the woarm up.  I shut flow off this morning      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      250   Tue Jul 15 08:47:13 2008 Doug Preddy Normal Running Screen grab of normal running Solenoid was recovered on Sunday July 13. The power leads started to ripple slightly this morning, so I cycled HIC142. No real      251   Thu Jul 24 16:28:50 2008 Doug Preddy Quench Recovery power bump There was a power bump at ~15:00 today. All mseon hall cooling water went off. Compressor tripped. Main magnet went off.  Restarted      252   Fri Jul 25 21:48:15 2008 Doug Preddy Quench Recovery another quench System was stable and solenoid ramped up at 4:00 today. At about 7:30 it tripped off again. I came in and restarted the compressor      253   Sat Jul 26 01:06:04 2008 Doug Preddy Quench Recovery Refrigerator in series mode Switched to series mode. Solenoid ~8K, starting to build liquid.       254   Sat Jul 26 01:29:21 2008 Doug Preddy Quench Recovery power leads ops will monitor liquid level. When it's at 60% they will come down and open the power lead valve. When the temperature ripples      255   Sat Aug 23 17:02:38 2008 Doug Preddy Quench Recovery Solenoid quenched The solenoid quenched this afternoon at ~12:30. The compressor shut down. Fault lights were cold box trip. Restarted the compressor      256   Sun Aug 24 06:45:14 2008 Doug Preddy Quench Recovery switch to series mode        257   Thu Sep 4 10:02:55 2008 Doug Preddy Normal Running ramping down solenoid Solenoid power supply will be turned off for Fall shutdown.      258   Tue Sep 9 15:04:23 2008 Doug Preddy Maintenance Jumpered interlock for diff pump water flow Jumpered interlock for diff pump water flow in Proteus box.      259   Fri Sep 26 09:44:25 2008 Doug Preddy Maintenance Water flow interlock restored yesterday      260   Fri Sep 26 09:45:18 2008 Doug Preddy Quench Recovery Solenoid quenched at 7:50 Compressor on. Turbines started. Vacuum system recovering.

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