Versatile, high brightness, cryogenic photoinjector electron source

Since the introduction of radio-frequency (rf) photoinjector electron source over thirty years ago, peak performance demands have dictated use high accelerating electric fields. With recent strong advances in obtainable field values, attendant increases beam brightness are expected to be dramatic. In this article, we examine implementation very gradient acceleration a frequency, cryogenic rf photoinjector. We discuss detail effects introducing, through an optimized cavity shape, rich spatial harmonic content modes device. Higher harmonics give useful, enhanced linear focusing effects, as well potentially deleterious nonlinear transverse forces. They also serve strongly increase ratio average surface field, thus aiding managing power and dark current-related challenges. investigate two scenarios which aimed at unique exploitation capabilities source. First, obtaining extremely six-dimensional for advanced free-electron laser applications. magnetized photocathode device producing unprecedented low asymmetric emittance, high-current beams that reach collider-compatible performance. As both demand advanced, compact solenoid design, describe novel system. magnetostatic structures introduced, analyze collective dynamics these systems theory multiparticle simulations, including particular emphasis on granularity associated with microscopic Coulomb interactions.9 MoreReceived 16 March 2021Accepted 25 May 2021DOI:https://doi.org/10.1103/PhysRevAccelBeams.24.063401Published by American Physical Society under terms Creative Commons Attribution 4.0 International license. Further distribution work must maintain attribution author(s) published article’s title, journal citation, DOI.Published SocietyPhysics Subject Headings (PhySH)Research AreasBeam dynamicsLow-energy multiple-particle dynamicsPhysical SystemsElectron sourcesAccelerators & Beams