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User name J. W. Martin
Log entry time 15:52:35 on March 14, 2004
Entry number 79175
keyword=RC Summary 3/13 Day Shift - 3/14 Day Shift
RC Summary
Saturday, March 13 day
through
Sunday, March 14 day
- Beam still off for maintenance period.
Achievements and events
- 6:00 - 9:30 several ESR crashes. Moller cryoline pump-down
carried out. Cold return line had worst vacuum.
- 4:00 Reza Kazimi called in to work on injector. 14:00 PD
reports injector transmission at 80%. Expect beam approx 16:00.
Plans
Recovery Plan (on delivery of physics beam to Hall C):
- Parity Quality Check (1 shift). TE checkout during this.
- Usual LH2 running with longitudinal beam until Monday morning.
- Monday 9:00-15:00 spin dance and retune for transverse running.
The Caveats:
- If longitudinal parity quality has not been established by
Monday 7:00, we will delay the spin dance and transverse running by one week.
- Even if this happens, Reza Kaizimi will likely request a few hours of
testing retuning in the Wien filter section with large Wien angles, to get
experience for eventual transverse running.
- If a transverse tune in the Wien section cannot be established, we
would likely also fall back to delaying transverse running by a week.
Acceptable in this case is good (>65%) transmission through the
injector with greater than 30 uA.
Pending requests:
- Before taking a TE run, check YO timing (see run plan).
- French electronics checkout with beam (few hours, parasitic)
requested by Christophe Furget.
- Harp scans (no well-defined plan, yet; need to read the latest
from Steve Williamson).
- 6 h at 1 uA Fastbus requested by Julie Roche to check PMT gains.
Will fit this in some time.
Concerns and Their Resolution
- SMS fast dump protect ... To my knowledge, Steve Williamson was
still working on it.
- Using G0 Halo monitors to readout harps ... Paul King reported
that Arne Freyburg will look into software to make this easier for
Monday. We should pursue Arne on this. Steve Williamson also
recently wrote a long g0log
entry about this.
- Spikes in the French timing spectra appearing from time to time ...
Under investigation by Jacques Arvieux and Sarah Phillips.