User name Z.-E. Meziani
Log entry time 16:10:14 on July21,2005
Entry number 148922
8:00 Shift start.
8:40 asked for beam off (target misbehaving)
8:45 Controlled access
Jian Ping Chen to releive the target pressure
David L'huillier to connect some cables for the Compton pol
John Musson to get some IOC's working
9:45 Hall A in Power power permit status
Jian Ping changed the He bottle and set the pressure of the target around 200
psi. Temperature 6.4 K
David reconnected the cables for the Compton signals to be available upstairs.
John rebooted the IOC for the cavity monitors
-Moved the target to empty position before asking for beam.
Target didn't move first until have gone through the clear selected record.
- Requested 5uA to check the beam position
- Moving target to He position
10:25 Starting with beam at 5 uA and ramping to 35 uA.
There are still sometimes, for unclear reasons, excursions of the target
pressure as large as +20/-10 psi
Starting production data
Run # Start -- Stop # of events
3738 11:00 11:51 91866 not useful (detectors saturated)
Since the owl shift the high voltage on the detectors not set properly. Brian
Moffit adjusted the high voltages.
Starting a new production run
3740 12:12 12:18 11640 Short run
MCC took the beam back to tune up the Hall C beam line.
12:40 Target moved to empty position
12:45 Implementation of the Phase advance mode.
Just starting to bring beam back to nominal BPMB and BPMA positions.
13:05 MCC takes back beam for Hall C tuning
13:50 Some beam is sent back to Hall A for tuning.
Waiting for positions to settle to take look at the raster size with spot++.
A first look at the spot size, suggests that we need to adjust the size of the
raster. Beam off. Waiting for beam to adjust the raster.
Raster sizes with spot++ logged. The size at the target is only 3X3
It is not adequate for production runs. We are requesting to load the old
optics in order for us to start production. See Paschke's log for the phase
15:35 Beam is not back at the right position namely
15:35 Quench of the left septum magnet see the history charts of the septa and
the log. Marc Stevens needed to go down the Hall to recycle the power.
16:00 Hall in controlled access end of shift