Speaker
Description
We present an RF photoinjector architecture that utilizes the TM$_{02}$ mode in the first half-cell housing the cathode. Unlike the conventional TM$_{01}$ mode configuration, this design introduces a controlled discontinuity in the surface field, producing a region free of surface currents. This unique topology allows the cathode to be mechanically separated from the gun body without compromising RF performance or requiring precise electrical continuity at the interface. The photoinjector should, in principle, deliver a very high cathode gradient and, consequently, high beam brightness. At the same time, the detachable cathode assembly is compatible with load-lock systems, which can transfer high QE semiconductor cathodes into high-gradient RF photoinjector structures under UHV.
Funding Agency
This Work is funded by the National Science Foundation (NSF) under award number: 2153503
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