Title :
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
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;
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
DOI :
10.1109/PAC.1991.164595
