User name M JOnes
Log entry time 08:03:00 on May26,2000
Entry number 42047
keyword=shift summary owl shiftDoing pion production for theta_cm = 50 phi=0
Run 1337 start 00:08 end 00:44 1.15M
Run 1338 start 00:45 end 01:19 1.127M
Run 1339 start 01:20 end 01:55 1.153M
run 1340 start 01:57 end 02:32 1.152M
Set up for harp run 907 dummy 10cm no raster
run 1341 start 02:47 end 02:52
No change in intrinsic beam size.
Go back to 15cm LH2 and raster.
Problem bringing beam back.
With LH2 target in the beam trips due to beam dump ion chamber.
MCC claims that beam hasn't changed.
With empty target see large rates T1=1kHz and T3=2kHz at 1uA
Look at spot and only half is illuminated as seen below indicating that
the target ladder has shifted. Time is around 5am
Call Dave Meekins to come in and check target. Call MCC for access
and to get radcon.
One of the target lifters is out of alignment with the other two (3/16 inch). As a
consequence the target assembly is shifted sideways. One of the iternal
alignment bulls eyes has fallen out of its socket, so the chamber has to be
opened for realignment.
07:05 : Dave Meekins starts target warmup procedure.
FIGURE 1
