Energy vernier system for CEBAF

Author

Krafft, G.A. ; Bisognano, J.J. ; Crofford, M.T. ; Hovater, J.C. ; Merminga, L. ; Simrock, S.N. ; Witherspoon, S.D. ; Kubo, K.

Author_Institution

CEBAF, Newport News, VA, USA

fYear

1993

fDate

17-20 May 1993

Firstpage

2364

Abstract

The beam energy of CEBAF must be accurately controlled for precise physics experiments. In order to achieve a relative energy spread better than σ_E/E=2.5×10^-5, a feedback system is needed to stabilize the energy against phase and amplitude fluctuations in the individual cavities. In the energy vernier system, the energy deviation of the beam is measured at a location with high dispersion. The error signal controls the accelerating gradient of selected vernier cavities. The methods used to correct the energy will be discussed, as well as the noise sources in the system. The results of beam tests at the CEBAF north linac will also be reported

Keywords

electron accelerators; linear accelerators; particle beam diagnostics; CEBAF; CEBAF north linac; accelerating gradient; amplitude fluctuations; beam energy; dispersion; energy vernier system; feedback system; noise sources; phase fluctuations; relative energy spread; vernier cavities; Acceleration; Dispersion; Electron beams; Energy measurement; Error correction; Feedback; Fluctuations; Linear particle accelerator; Physics; Radio frequency;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1993., Proceedings of the 1993

Conference_Location

Washington, DC

Print_ISBN

0-7803-1203-1

Type

conf

DOI

10.1109/PAC.1993.309323

Filename

309323