Details

Autor(en) / Beteiligte

• Mohsen, O.
• Mihalcea, D.
• Tom, N.
• Adams, N.
• Dhuley, R.C.
• Geelhoed, M.I.
• McKeown, A.
• Korampally, V.
• Piot, P.
• Salehinia, I.
• Thangaraj, J.C.T.
• Xu, T.

Titel

A field-enhanced conduction-cooled superconducting cavity for high-repetition-rate ultrafast electron bunch generation

Ist Teil von

• Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 2021-07, Vol.1005 (C), p.165414, Article 165414

Ort / Verlag

Netherlands: Elsevier B.V

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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.