User name R. Michaels
Log entry time 04:52:50 on January21,2008
Entry number 226526
Followups:
keyword=PREX stress test. part 1.Thick PREX target.
(X,Y) = (0.1) = nominally good alignment.
Raster = 6.5 x 5 (MCC setting) = 4 x 4 (reality) = 2.7 x 2.7 (obs.)
(see previous halogs for explanation)
Will ramp the beam current and monitor rates and raster XY.
Run 3089 start at 3:51
This run will go continuously.
Time ... Current ... T1 .... T3 .... Comments
03:51 ... 2 uA ..... 1030 ... 640
03:56 ... 10 uA .... 5300 ... 3300
04:08 ... MCC stops for a QE measurement.
Also need to reset a "box" of some sort ...
04:20 beam returns. We have asked for 20 uA
04:20 .... 20 uA ... 10.75 kHz ... 6400 Hz
04:30 .... 30 uA ... 15.3 k ...... 9.45 K
Wanted to go to 40 uA. Cannot because of ion chambers tripping.
MCC will call Radcon to get permission.
Remain at 30 uA for now.
FIGURE 1
