Final bunch rotation and momentum spread limitation for the ESS facility

Author

Bongardt, K. ; Pabst, M.

Author_Institution

Forschungszentrum Julich GmbH, Germany

Volume

5

fYear

1995

fDate

1-5 May 1995

Firstpage

3200

Abstract

The key issue of the accelerator part of the European Spallation Source (ESS) is the loss free ring injection. In the transfer line between linac and compressor rings two RF cavities, phased independently, are installed followed by an achromatic collimator. This two-stage system allows an optimum energy spread limitation under varying beam current and energy ramping conditions. The system aims to have less than 10^-4 particles outside an energy spread of ±2 MeV at ring injection. Longitudinal space charge forces are still present and cause an increase of the energy spread and the longitudinal emittance. Multiparticle calculations with varying beam currents are presented for the 130 m long straight transfer line after the linac end

Keywords

accelerator RF systems; accelerator cavities; beam handling techniques; particle beam injection; proton accelerators; space charge; storage rings; 130 m; ESS facility; European Spallation Source; RF cavities; accelerator part; achromatic collimator; compressor rings; energy ramping; energy spread; final bunch rotation; linac end; longitudinal emittance; longitudinal space charge forces; loss free ring injection; momentum spread limitation; multiparticle calculations; transfer line; two-stage system; varying beam current; Colliding beam accelerators; Collimators; Electronic switching systems; Kinetic energy; Linear particle accelerator; Particle accelerators; Particle beam injection; Particle beams; Pulse compression methods; Space charge;

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.1995.505828

Filename

505828