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User name R. Michaels
Log entry time 03:51:19 on March27,2014
Entry number 387698
keyword=BPM/raster check, part 1
Plan : check the BPM readout and the raster
When I arrived at about 3:10, there was 5 uA CW unrastered beam on a BeO target.
We did a short run with mostly pulser trigger
Run 1256 / 20270
beam position is at "nominal zero".
I think the quads are in a normal config downstream but
BPM4A at -0.79, -0.35 mm (nominal zero)
BPM4D at -0.28, 0.81 mm -- this is still called 4B by some GUIs
Asked to reduce to 2 uA.
MCC cannot move the beam much without tripping ion chambers at the dump.
I guess they are hitting the target frame.
03:30 Put target to empty position. Ask for 2 uA. No raster
Asked to move beam. Have X,Y = -2, -1 mm
Runs 1257 / 20271
03:40 Ask for X,Y = +2, +2 mm
BPM4A at 0.8, 0.6
BPM4B at 2.2, 2.4
Run 1258 / 20272 with these conditions. Plots posted later.