Bunch length measurement using beam spectrum (CESR storage ring)

Author

Greenwald, Z. ; Hartill, D.L. ; Littauer, R.M. ; Peck, S.B. ; Rice, D.H.

Author_Institution

Lab. of Nucl. Studies, Cornell Univ., Ithaca, NY, USA

fYear

1991

fDate

6-9 May 1991

Firstpage

1246

Abstract

A procedure for extracting the bunch length from the beam-induced voltage spectrum is applied at CESR, for various bunch currents, to indicate whether the turbulent lengthening threshold is exceeded by short, high-current bunches. The approach is to monitor the signal spectrum from one of the detector buttons up to 8 GHz. The measuring system is calibrated by reference to a low-current bunch (1 mA), which is assumed to have a Gaussian profile with the theoretically predicted length. In this experiment, a single bunch was used with a natural length of 15 mm. No bunch lengthening was detected up to a current of 20 mA.<>

Keywords

electron accelerators; particle beam diagnostics; storage rings; CESR; Gaussian profile; beam-induced voltage spectrum; bunch length; detector buttons; particle beam diagnostics; signal spectrum; turbulent lengthening threshold; Electrodes; Frequency; Laboratories; Length measurement; Monitoring; Particle beam measurements; Particle beams; Storage rings; Threshold voltage; Transfer functions;

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.1991.164595

Filename

164595