Design of the Low-Energy DC Gun for Field-Emission Cathode Investigation

A Direct-Current (DC) electron source test-stand to explore field-emission from various cathodes has been designed. The design also includes a provision to allow for laser-triggered field emission using a femtosecond laser source. The gun is instrumented to measure the beam transverse distribution, the transverse emittance, and I-V characteristic curves. The electrostatic design of the gun and multi-particle simulations of the beamline are presented and planned experiment discussed.