Collective effects in single bunch mode at the Photon factory storage ring

Author

Nakamura, N. ; Sakanaka, S. ; Haga, K. ; Izawa, M. ; Katsura, T.

Author_Institution

KEK Nat. Lab. for High Energy Phys., Ibaraki, Japan

fYear

1991

fDate

6-9 May 1991

Firstpage

440

Abstract

The bunch length and width in the single bunch mode were measured as a function of bunch current. Bunch lengthening and widening were observed and compared with theoretical models of potential-well distortion and microwave instability. The experimental data was found to agree with these theoretical models. At the same time, the longitudinal effective impedance was obtained. The coherent betatron tune shifts were also observed. The tune shifts were explained with the head-tail mode theory, which gave an estimate of the horizontal and vertical effective impedances.<>

Keywords

electron accelerators; particle beam diagnostics; storage rings; Photon factory storage ring; bunch length; coherent betatron tune shifts; head-tail mode theory; longitudinal effective impedance; microwave instability; potential-well distortion; single bunch mode; vertical effective impedances; Energy measurement; Impedance; Length measurement; Photodiodes; Positrons; Production facilities; Radio frequency; Storage rings; Synchrotron radiation; Time measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE

Conference_Location

San Francisco, CA, USA

Print_ISBN

0-7803-0135-8

Type

conf

DOI

10.1109/PAC.1991.164327

Filename

164327