Gridded RF Gun Design for SRF Linac Applications
I. Gonin (1), C. Edwards (1), S. Kazakov (1), T. Khabiboulline (1), T., Nicol (1), A. Saini (1), N. Solyak (1), J.C.T. Thangaraj (1), V. Yakovlev, (1), M. Curtis (2), K. Gunther (2) ((1) FNAL, Batavia, USA, (2) HeatWave, Labs, Inc., Watsonville, CA, USA)
TL;DR
This paper presents the design and testing of a thermionic gridded RF gun integrated into a superconducting RF linac, demonstrating its capability to produce short electron bunches suitable for acceleration.
Contribution
It introduces a novel RF gun design for SRF linacs, including detailed resonator design and validation through perveance measurements, aligning with the linac's operational parameters.
Findings
Perveance measurements agree with design expectations
The RF gun effectively produces short electron bunches
Beam matching minimizes current interception in the SRF cavity
Abstract
The thermionic gridded gun is described which generates short electron bunches for further acceleration in a Nb3Sn conduction cooled SRF linac. The gun is built into the first cavity of the 250 keV injector [1] for the 20 kW, 10 MeV, 1.3 GHz CW conduction cooled one-cavity linac. The beam current is 2 mA. The RF gun design is presented as well as the results of perveance measurements, which are in a good agreement with the design parameters. The design of the RF resonator of the gun is presented also. The beam generated by the gun is matched to the injector to provide lack of current interception in the SRF cavity.
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Taxonomy
TopicsParticle accelerators and beam dynamics · Electromagnetic Launch and Propulsion Technology · Gyrotron and Vacuum Electronics Research