HIGH FIELD GRADIENT POLARIZED ELECTRON GUN FOR ILC

A 200-keV gun has been developed for generation of bunch charge of 2 3.2 nC, bunch length of 5 2 ns multi-bunch polarized electron beam that is required for International Linear Collider. In this paper, the beam simulations using General Particle Tracer (GPT) code for such space-charge dominated regions, and a fabrication method of electrode for higher electric field (2 3 MV/m) at the photocathode surface by using a titanium anode and a molybdenum cathode are described.