A Field-Enhanced Conduction-Cooled Superconducting Cavity for High-Repetition-Rate Ultrafast Electron Bunch Generation
| Autor: | Osama Mohsen, Jayakar Thangaraj, N. Adams, Ram Dhuley, D. Mihalcea, Venumadhav Korampally, I. Salehinia, Michael Geelhoed, T. Xu, Aaron McKeown, N. Tom, Philippe Piot |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
Accelerator Physics (physics.acc-ph) Nuclear and High Energy Physics Range (particle radiation) 010308 nuclear & particles physics business.industry FOS: Physical sciences Electron Cryocooler Radiation 01 natural sciences Resonator 0103 physical sciences Optoelectronics Physics::Accelerator Physics Thermal emittance Physics - Accelerator Physics 010306 general physics business Instrumentation Ultrashort pulse Common emitter |
| Popis: | High-repetition-rate sources of bright electron bunches have a wide range of applications. They can directly be employed as probes in electron-scattering setups, or serve as a backbone for the generation of radiation over a broad range of the electromagnetic spectrum. This paper describes the development of a compact sub-Mega-electronvolt (sub-MeV) electron-source setup capable of operating at MHz repetition rates and forming sub-picosecond electron bunches with transverse emittance below 20 nm. The setup relies on a conduction-cooled superconducting single-cell resonator with its geometry altered to enhance the field at the surface of the emitter. The system is designed to accommodate cooling using a 2 W pulse-tube cryogen-free cryocooler operated at 4.2 K. Although we focus on the case of a photoemitted electron bunch, the scheme could be adapted to other emission mechanisms. |
| Databáze: | OpenAIRE |
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