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Description
Compact SRF industrial linacs can deliver beam powers exceeding 500 kW within the 10 MeV regulatory limit that is difficult to achieve with normal-conducting linacs in a constrained footprint. Although SRF technology was historically too costly and complex for widespread industrial deployment, the advent of conduction cooling has enabled compact, stand-alone SRF systems suitable for both industrial and research applications. However, the limited cooling capacity imposes stringent requirements on beam parameters, including essentially zero beam loss on the SRF cavity walls. This, in turn, demands precise control of the injected beam energy and, critically, high-quality bunching with negligible inter-bunch particles. In collaboration with Fermilab, we developed a CW normal-conducting RF injector featuring a gridded RF gun integrated with the first cell of a copper booster cavity to meet these requirements. This paper presents the complete development of the booster cavity, covering beam dynamics optimization, RF and thermomechanical design, engineering implementation, fabrication, and bench measurement.
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