Space charge effects during the injection period of the KEK PS main ring

Author

Igarashi, S. ; Miura, T. ; Nakamura, E. ; Shimosaki, Y. ; Shirakata, M. ; Takayama, K. ; Toyama, T.

Author_Institution

KEK, Tsukuba, Japan

Volume

4

fYear

2003

fDate

12-16 May 2003

Firstpage

2610

Abstract

Space charge effects during the injection period of the 12 GeV main ring of the KEK proton synchrotron have been studied. Measurement of the transverse beam profiles using flying wires has revealed a characteristic temporal change of the beam profile within a few milliseconds after injection. Horizontal emittance growth was observed when the horizontal tune was close to the integer. The effect was more enhanced for higher beam intensity and could not be explained with the injection mismatch. Resonance created by the space charge field was the cause of the emittance growth. A multiparticle tracking simulation program, ACCSIM, taking account of space charge effects has qualitatively reproduced the beam profiles.

Keywords

high energy physics instrumentation computing; particle beam diagnostics; particle beam injection; particle beam stability; proton accelerators; space charge; synchrotrons; ACCSIM; KEK PS main ring; KEK proton synchrotron; characteristic temporal change; emittance growth; flying wires; higher beam intensity; horizontal emittance growth; horizontal tune; injection mismatch; multiparticle tracking simulation program; resonance; space charge; space charge effects; transverse beam profiles; Image reconstruction; Kinetic energy; Neutrino sources; Particle beam injection; Particle beam measurements; Particle beams; Protons; Space charge; Synchrotrons; Wire;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the

ISSN

1063-3928

Print_ISBN

0-7803-7738-9

Type

conf

DOI

10.1109/PAC.2003.1289205

Filename

1289205