User name ulmer
Log entry time 16:05:45 on June13,2002
Entry number 86001
Start shift with continuation of Q2D_b50 point.
10:15 ROC14 and ROC 1 crashed. Declare the Q2D_b50 point done:
Got 300 of the 330 wanted coincidence events.
10:30 DAQ back up and running: do Q2D_b50 efficiency run.
10:35 MCC takes beam away for injector studies. They estimate minimum
down time of 1 hour. Set up for Q2D_bcN in the meantime.
13:25 Beam back (low current). A perfect opportunity to do Arc energy
measurement since only 5 uA is needed and that's what we now have.
13:30 While waiting for Arun, continue with production data: Q2D_bcN
at 50 uA. More DAQ problems, so this point takes a bit longer than
14:15 End Q2D_bcN and set up for Arc energy measurement: 5 uA unrastered
on optics target. OTR near target shows multiple peaks in Y for unrastered
beam (also saw signal outside of normal raster pattern previously - just
before MCC took beam away at 10:35 and until 14:15). Arun is talking
with MCC now to troubleshoot.
14:30 Now OTR looks fine (unrastered shows 1 narrow peak).
14:31 Arc energy measurement fails due to harp scanner problem. This will
need to be dealt with during next development day. May entail bringing
that section of beamline up to air and replacing module (few hours).
See Halog 85999.
14:40 Harp scan (performed by Arun). See Halog 86000. OTR widths are
twice as large as Harp, roughly, in both X and Y. MCC is looking into
15:00 Bodo starts ep energy measurement.
16:00 Bodo finishes ep measurement. I hear thunder and the beam goes away.
I wonder if there is a connection.
We are currently set up for the Q2D_c20 kinematics, though no data has been
taken yet on this point.