User name Markowitz
Log entry time 21:39:08 on December18,2003
Entry number 114584
From Doug Higinbotham:
Thursday Night Run Plan
5uA Unrastered Beam
Keep an eye on the Septum temperatures!
Once the beam has been returned to Hall and the position
has been centered. With no target, we need to ramp up the
right septum while making sure it doesn't steer the beam.
(READ THE SEPTUM GUIDE BEFORE USING SEPTUM)
Take the following steps:
50A, 100A, 125A, 150A, 175A, 200A, 225A
Remember the GUI is slow. Only enter a value once and wait.
Also after each step pause for a few minutes to make sure
everything is stable.
Once this test is done, you should setup for a momentum
of 2.025 GeV (Isetpoint=92.58*Pmom for Septum) Cycle the quads
when going up in momentum.
Next do a quick check of the beam.
Continuing with the raster off and empty target:
Do Harp A Scans (you should see approx. 50um beam size at 1H04B)
Next put in the thick 12C target. Check septum temperature
and the scaler rates. (you should be in elastic kinematics)
Now do a bullseye scan. For the first point take a long run.
(at least 250k, at least 25k for rest of the grid)
Remember to also take a harp scan for each position. In total
you need nine points on a -/+ 1 mm grid around 0,0.
Repeat the 0,0 point at the end (250k).
For each point log the position, data run number, and harp scan number.
Be sure to look at all of the data with the analyzer.
If this goes well, try setting up the raster again. Ask MCC to set the
beam current limit on the raster GUI to 10 uA and then you should be able
to get to the 1x1mm2 raster. Do NOT spend more the 30 min. on this.
If they cannot make the 1x1mm2 raster, just use as small as they can give
Next put in the waterfall target.
Next turn on the waterfall target. READ the Waterfall Docuemnt First!!
You should set the sliding bar to around 3200. Keep an eye on the
HRS scaler rates. The tach should read approx. 900. The other readbacks
do not work. Wait at least 5 min. for things to stabilize.
Take at least 250k in this setup.
The Hall needs to be in restricted access for Ed Folt by 8am. So please
stop taking data by approx. 7:30 to let MCC get the opened up.