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Archived Messages for TAGGER@cebaf.gov: Progress

Progress

B. L. Berman (berman@gwis2.circ.gwu.edu)
Wed, 03 Sep 1997 15:37:27 -0400 (EDT)

Dear photofission people:
Owing to the difficulties we have experienced in getting both the
accelerator and the DAQ to work simultaneously, we have been granted an
extension to continue the run (begun auspiciously yesterday, after many
days of preliminary tests and tagger commissioning) to Sunday morning.
Therefore we need people to man the six shifts between Friday morning and
Sunday morning, including those during the Hall B Collaboration Meeting.
Please let me know your preferences; if we have not spoken personally
about it, please let me know your availability. Please let me know in
person, by phone (5244 or 5247), or by email ASAP, preferably by this
evening at 8. Thanks very much.

We are able to take data at roughly 80 Hz, corresponding to about 15 nA on
radiator A (the thick one). Of these events, about 15% turn out to be
useful (tagged events above our pulse-height cut). At this rate, we'll
need about 40-50 hours of actual data-collection time, in addition to
calibration and efficiency runs. We're hoping that the accelerator will
run well enough to complete the experiment in the available time!

Again, please get back to me ASAP. Thanks again, Barry

Barry L. Berman
Professor and Chair
Department of Physics
The George Washington University
Corcoran Hall, Suite 208
725 21st Street NW
Washington, DC 20052
Telephone: (202) 994-7192
Secretary: (202) 994-6276
Fax: (202) 994-3001
>>> Please note: My new E-mail address is berman@gwis2.circ.gwu.edu <<<