Electron Beam Analysis for Cyclotron Harmonic and Free-Electron Laser Devices.

摘要

Two separate experiments are described. The first was on the velocity distribution analysis of a gyrating electron beam. A retarding-potential analyzer was developed which operated at 75 kV and accepted gyrating electrons with large Larmo radii. Velocity distributions were compared with simulation results. The second experiment explored the possibility of forming a large-area electron beam from polycrystalline diamond film. Diamond, a negative electron affinity material in the crystalline <111> direction, has been observed to emit electrons into vacuum in certain configurations, but this effort was unsuccessful in obtaining emission. Electron beams, Gyrating electron beams, Electron beam analysis, Negative electron affinity, Diamond.