Polarization Measurement of Spin-Polarized Electrons by Optical Electron Polarimeter

The polarization of spin-polarized electrons, produced from a new GaAs spin-polarized electron source, is determined by an optical electron polarimeter. The He 3 ³P → 2³S₁ (388.9nm) transition is used for the optical electron polarimetry. The structure and performance of the experimental setup of spin-polarized electron source and optical electron polarimeter are described. The result of polarization of 30.8% averaged spin-up and spin-down polarized electrons is obtained and presented.