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User name R. Michaels
Log entry time 00:38:21 on October22,2005
Entry number 157653
keyword=target to empty / beam tuning
Per request of MCC, I put the target to empty position. The MCC will
do some beam tuning at low current. Meanwhile Left Septum is still
cooling (8.6 K now). I talked to crew chief Lehmann. He needs to
get a good beam tune through Compton, etc. He thinks he has that
now but the eP ion chambers are tripping. After he realized the
L-septum is off, causing asymmetric steering, he thinks that may
be why eP trips. But I doubt it because those ion chambers are way
upstream. Our plan is:
1. Try more tuning to target at very low current.
2. After L-septum is cool enough (ca 6.5 K) we turn it on.
3. More tuning with both septum on -- ensure good beam to dump.
4. If ion chambers still trip they will need to be masked (requires
permissions).
5. Eventually : High current / raster check / target in.