Nuclear Physics Seminars

ics Nuclear
Tuesday, September 20, 2005
3:30 PM
Physics Building, Room 204
Stephen Bueltmann [Host: Donal Day]
Old Dominion University
"The BoNuS Experiment at Jefferson Lab"
ABSTRACT:
Unlike the structure of the proton, our understanding of the structure of the neutron to date is limited by the unavailability of free neutrons. The BoNuS collaboration at Jefferson Lab is preparing an experiment to augement the CLAS detector in Hall B with a recoil detector to measure the momentum of recoiling protons in electron scattering on a deuterium target. The detection of very low momentum spectator protons at very backward scattering angles selects electron scattering events on almost free neutrons inside the deuteron. The newly developed recoil detector and gas target system has to be built out of lightweight materials to not absorb the very low momentum spectator protons before being detected. The experiment is scheduled to start data taking in the middle of Octber 2005 and results from an engineering run in June 2005 are presented.

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