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User name jpchen
Log entry time 18:15:30 on June17,2010
Entry number 327101
keyword=cool-down progress and cryo ioc problem
Target cool-down progressing well: after cooled down the line, I started opening J-T to cool the target. The supply/return from ESR
are all at 20s (22/26)K while our target supply and return are
still high (134/146)K. Scattering chamber vacuum went up when J-T first opened (warm gas coming first due to line warmed before cold
gas arrived). Now vacuum is pretty good at 2-3*10-6.
We lost EPIC readback values from ESR. Talked to MCC and I was told dthat probably it's due to the cryo ioc problem and the Guides should already called the cryo on-call to look at the problem.