Minutes of Hall A Group Meeting November 3, 2009
1)	Installation: (Ed Folts)
a)	Almost ready for beam in the Hall
b)	Left arm is in position
c)	Will move the right this afternoon
d)	Jack is working on the pre-shower
e)	Checklist is essentially done
f)	Plan:
i)	Close tonight for beam tuning and Compton 
studies
ii)	Open again tomorrow (11/4) to finish cabling, 
target cooldown, and survey the right arm
iii)	Begin taking beam to the experiment in the 
evening
g)	Bogies are not working, moving a spectrometer 
requires a team of 8 people in the Hall 
supervised by Ed.
i)	Moves will have to be setup in advance
ii)	Ed is working on the bogies on the bench 
while the Hall is locked
2)	Al Gavalya
a)	Continue working on Compton
i)	Providing a test stand
ii)	Meeting to finalize acceptance of the laser 
enclosure
iii)	Several items are in the shop
iv)	Tying up loose ends
b)	PREX targets are in the target lab
c)	Macon is working on water lines etc. for the PREX 
test setup
d)	Susan is detailing the actuator for the beam 
degrader
e)	Al has taken the redesign plans from France as 
far as he can
3)	Bert Manzlak
a)	New safety documents for PVDIS are in the 
counting house. Please read and sign them. 
Contact Bert if you have questions. 
(manzlak@jlab.org)
b)	There was a first aid case in Hall B last week. 
Reminds us to report all injuries, even minor 
ones to health services.
c)	Hall C is decommissioning HKS and installing 
Qweak. They have for the present purposes a 
“Conduct of Installation” document that you must 
read and sign in order to go into the Hall 
unescorted. Also, you need a hardhat in Hall C.
4)	Alexandre Camsonne
a)	Working on the Compton electron detector
5)	J-P Chen
a)	Attending the EICAC workshop
b)	Re target training; anyone who wants it should 
contact J-P. (jpchen@jlab.org)
6)	Ole Hansen
a)	New version of the C++ analyzer will go out 
tomorrow (11/4)
i)	Some small improvements
ii)	New pre-optimized HRS database
b)	Has circulated an e-mail re the need for the 
absoft FORTRAN compiler. Response so far has been 
thin. If you have any strong feelings contact Ole 
(ole@jlab.org)
7)	Bogdan Wojtsekhowski
a)	Busy with experiment preparations
b)	Re e-ion collider, figure with one year of 
running can measure neutron and proton form 
factors out to Q2 = 50 GeV2
c)	Considering a possible dark matter experiment 
being pushed by people from SLAC
8)	Sirish Nanda
a)	Compton upgrade from the green laser point of 
view
i)	Have run a series of tests
ii)	Infra-red seed laser to a crystal to double 
the frequency
iii)	Worked pretty well up to ~700 Watts
iv)	Above 700 Watts thermal effects distort the 
mirrors
v)	Would like to go to 1.5 KWatts
vi)	Looking into better, low loss, mirrors
9)	Dennis Skopik
a)	Physics division has a large number of 
evaluations outstanding. We need to get them in. 
Kees says he’s waiting for the peer review.
b)	New regulation coming down from DOE. If you are 
on foreign travel for more than 20 days in a year 
you must be tested for AIDS.
10)	Doug Higinbotham
a)	Re new database in the C++ analyzer; many people 
worked very hard on it. It works really well from 
1 to 3 GeV/c
11)	Kees de Jager expresses appreciation for the huge 
efforts made by the technical group to recover from 
the site-wide power outages and HAPPEX III and get 
us back online. Applause!
-JJL