5 MeV Mott polarimeter for rapid precise electron beam polarization measurements

摘要

Low energy (E(sub k) = 100 keV) Mott scattering polarimeters are ill-suited to support operations foreseen for the polarized electron injector at Jefferson Lab. One solution is to measure the polarization at 5 MeV where multiple and plural scattering are unimportant and precision beam monitoring is straightforward. The higher injector beam current offsets the lower cross-sections; measured rates scale to 1 kHz/(mu)A with a 1 (mu)m thick gold target foil.