Minutes of Hall A Group Meeting October 27, 2009
1)	Run Report: (Wouter Deconinck)
a)	For full details of day-to-day summaries see: 
http://www.jlab.org/~wdconinc/happex/RC-Summary-
Oct27-2009.pdf
b)	It wasn�t a good week
i)	2 Accelerator site-wide power failures
ii)	Magnet power supply problems
iii)	Target problems
iv)	Accelerator controls problems
v)	Etc�.
c)	Beamtime summary
i)	Scheduled: 153 hours
ii)	Actual: 75.6 hours
iii)	ABU: 39.1 hours
iv)	BANU: 76.1 hours
d)	Major reasons for BANU:
i)	Power outage (not really BANU)
ii)	Fast feedback problems
iii)	Target fan failure in loop 3, change-over to 
loop 1
iv)	Spectrometer magnet cryogenics
v)	2nd Power outage
e)	HAPPEX III is finished, remaining shifts are 
canceled
2)	Installation: (Ed Folts)
a)	Continuing to support the experiment
b)	Working on:
i)	 M�ller
ii)	PREX septum platform
iii)	Keeping abreast of PREX septum magnet
c)	Spent a lot of time this week on HAPPEX III
3)	Javier Gomez: All efforts are now directed towards 
getting both spectrometers up and running for the 
next experiment, PVDIS.
4)	Jack Segal
a)	Continuing with magnet work today (10/27)
b)	Start detector work tomorrow (10/28)
c)	There�s lots of radiation damage to repair.
5)	Al Gavalya
a)	PREX septum magnets: Al and Macon are supporting 
magnet tests in Hall C
i)	Found a few iron pieces out of spec. Have made 
adjustments.
b)	Joyce is finishing the details of the Compton 
laser enclosure. Expect to have drawings checked 
by the end of the week.
c)	Susan is working on the details of the actuator 
for the beam degrader for PREX.
d)	Received designs from Charles Hyde for 
modifications for the DVCS run
6)	Dave Meekins
a)	Tells Ed that he has to do a pump and purge on 
the target tomorrow before bringing the 
scattering chamber up to air.
b)	Don�t anticipate any problems getting the target 
ready for PVDIS
c)	Will have to send the PREX target out for work.
-JJL