Dark currents for CEBAF linacs

Author

Yunn, Byung C.

Author_Institution

Continuous Electron Beam Accel. Facility, Newport News, VA, USA

Volume

5

fYear

1995

fDate

1-5 May 1995

Firstpage

3309

Abstract

Continuing on our numerical study [1] of field emitted electrons from a superconducting CEBAF cavity we have identified all possible emission sites, magnitudes, and the energy profile of dark currents expected at CEBAF under nominal operating conditions. We find that most electrons do not survive beyond a single cryomodule which includes eight 5-cell superconducting cavities. However, some electrons can be accelerated through many cryomodules, ending up with an energy close to 100 MeV. However, no field emitted electrons can be recirculated along with an electron beam generated at the gun, due to the limited energy acceptance of CEBAF recirculation arcs

Keywords

electron accelerators; electron guns; numerical analysis; particle beam diagnostics; superconducting cavity resonators; 100 MeV; 5-cell superconducting cavities; CEBAF linacs; CEBAF recirculation arcs; cryomodule; dark currents; electron gun; emission sites; energy profile; field emitted electrons; limited energy acceptance; nominal operating conditions; superconducting CEBAF cavity; Acceleration; Assembly; Dark current; Degradation; Electromagnetic fields; Electron accelerators; Electron beams; Electron emission; Linear accelerators; Spontaneous emission;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1995., Proceedings of the 1995

Conference_Location

Dallas, TX

Print_ISBN

0-7803-2934-1

Type

conf

DOI

10.1109/PAC.1995.505864

Filename

505864