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User name Yi Qiang
Log entry time 09:26:01 on November 10, 2009
Entry number 298748
Current major issues we have at this moments are:
1. High Compton background,
2. HRS magnet cryogen
3. Left HRS dipole
For the Compton issue, experts in MCC are gathered today to trouble-shoot
the problem and try to do the tuning. This probably will take the whole
day shift and they don't want to be interrupted by any access.
For the magnet cryogen, the right HRS magnets tripped due to low
cryogenic level. The techs are looking into, they seriously need access
to figure out the problem.
For the left HRS dipole, Jack also needs access to fix it.
So current plan is that, since the Compton/beam line experts are
available and have prepared for quite some time, we let them do the
tuning today, which means the techs can only start to work on the cryo
and dipole tomorrow. Currently, the right HRS cryo level seems recovered,
hopefully, we can still take production data on it tonight.
A copy of this log entry has been emailed to: xiaochao, rom, yqiang