Beat-wave Photoinjector for Generating Periodic Electron Bunches at THz Frequencies

[[abstract]]A laser beat wave is proposed to induce density modulated electron emission from a photocathode and is thereby used to generate a periodically bunched electron beam from a photocathode electron accelerator. This technique does not introduce additional energy spread or emittance to the electron beam. We also present a laser system for this purpose with a tunable beat frequency up to 40 THz.[[fileno]]2030114030034[[department]]電機工程學