[Host: Donal Day]
A precision measurement of the electric form factor of the neutron, G E n , has been carried out in Jefferson Lab's Hall A for Q 2 values of 1.2 to 3.5 (GeV/c) 2 using a highly polarized 3 He target and the quasi-elastic semi-exclusive 3 He(e,e'n) reaction. The experiment detected the ejected neutron with an array of scintillators and the scattered electron with the newly commissioned BigBite spectrometer. This new spectrometer has a large angular acceptance (80 msr), complementing the existing 6 msr high-resolution spectrometers, and enables a new generation of low-rate experiments with lower resolution requirements. A package of three multi-wire drift chambers was constructed in order to allow the spectrometer to operate under high rate conditions and achieve a spatial resolution of ~ 200 μm. The present status of the experiment will be presented as well as online results showing chamber performance at raw hit rates up to 20 MHz per plane.
Nuclear Physics Seminar
Tuesday, October 10, 2006
Physics Building, Room 204
Note special room.
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