[Hallb-engineering] CLAS shifts for tagger calibration data taking

Stepan Stepanyan stepanya at jlab.org
Thu Mar 17 11:58:56 EDT 2011

Dear all,

Beam delivery to Hall B is scheduled to start on March 26. We will start 
with tagger
focal plane calibration. This will be running photon beam (3 pass 
electron beam to
the tagger) on LH2 target and with standard CLAS configuration. Trigger 
setting will
be two prong events (like g11). The idea is to take enough statistics 
for exclusive
reactions, such as \gamma p -> ppi+pi-, to be able to calibration tagger 
energy with CLAS.

Since HDIce installation is delayed we formally canceled regular CLAS 
shifts. However,
we will need help to man the shifts from March 26 to April 5 (tentative 
schedule) for
calibration data taking. I asked Dan Protopopescu and he kindly provided 
a new shift sign-up
page for those days. Volunteers who wants to help should login and sign 
up for shifts that
they can take. There are some names already for those days on the shift 
schedule. People
who do not want to participate in the calibration runs but have their 
names there for the
CLAS shifts should let me or Eugene Pasyuk know ASAP that we can find 

Regards, Stepan

More information about the Hallb-engineering mailing list