A multi-frequency RF photocathode gun

Abstract

Abstract. The concept of a photocathode injection gun driven by several harmonically related phase-locked RF sources is considered. This concept is aimed at providing electron bunches with parameters as follows: charge/bunch ≥1 nC, bunch energy 5-10 MeV, bunch width 20-40 ps, and fundamental frequency = 1.3 GHz. In comparison with a conventional single mode 1.5 cell injection gun, multi-harmonic excitation can allow operation with lower RF power input, lower Ohmic losses, and lower beam emittance (for a given cathode field).

Summary report of Working Group 5: Beam and radiation generation, monitoring and control

“…S. V. Kuzikov an J. Hirschfield presented the design of a two frequency RF gun [5]. Two options were discussed, one based on a TM 010 -TM 011 f+2f cavity and the other one on a TM 010 -TM 030 f+3f cavity.…”