PREX TEST PLAN

This file: hallaweb.jlab.org/experiment/HAPPEX/prextest.html R. Michaels, Nov 2005

The PREX experiment will have a test run on the last day of the HAPPEX 2005 run. The main goals (adapted from Paul Souder's e-mail):

Good quartz scan to verify kinematics and backgrounds.
Low I counting data to verify above if possible.
Verify statistics at moderate I.
Measure dither coefficients.with HAPPEX detectors
Install UMass detctors (Keeping mass down).
- Measure widths.
- Measure dither coefficients.

The following tables show a time ordered list of the measurements including things not directly related to PREX for the last day of HAPPEX with the usual priorities "Must", "Should", "Like". At the moment the plans add to 22 hours, which implies starting at 10 AM. We must stop at 08:00 on Tues Nov 21. If the schedule starts to slide, we reject lower priority items.

PREX and other Test Plans
Plan	Priority	Duration	People
Modify BPMs, adjust ion chamber trips	Must	2 hours	CASA(BPM), Radcon(IC)
Low current monitor commissioning	Must	1 hour	CASA, R. Michaels
LH2 runs with low current	Should	1 hour	R. Michaels
Low pressure LH2 (Alum. Wall check)	Must	2 hours	D. Meekins, B. Moffit
Pass Change to 1-Pass Meanwhile cool target.	Must	2 hours	MCC
Alignment and low-I checks	Must	1 hour	R. Michaels
C12 and Alum targets ("calibration")	Like (maybe)	1 hour	R. Michaels
Quartz profile scans, Rate checks.	Must	2 hours	K. Paschke, L. Kaufman
Install UMass PREX detectors	Must	2 hours	K. Paschke, B. Moffit
Align UMass PREX detectors	Must	1 hour	B. Moffit
Ramp I to 4 uA, don't trip septa, regress, dither, see widths, etc	Must	2 hours	K. Paschke, L. Kaufman
Repeat previous step without S0, time permitting	Like	2 hours	K. Paschke, L.Kaufman
Ramp up current until septa trip. HAPPEX DAQ	Must	1 hours	K. Paschke, L. Kaufman
High current (5 to 80 uA), Lumi data, check if melts	Should	2 hours	R. Michaels