Title :
Bunch lengthening control using the fourth harmonic cavity in the VUV ring
Author :
Keane, J. ; Buda, S. ; Alsace, R.D. ; Fauchet, A. ; Ramirez, G. ; Thomas, M. ; Wachtel, J. ; Vignola, G.
Author_Institution :
Brookhaven Nat. Lab., Upton, NY, USA
Abstract :
It is suggested that a harmonic cavity in a synchrotron storage ring can be used to change the shape of the bucket potential. Adjustment of the amplitude and phase of the harmonic component to flatten the slope of the waveform of the synchronous voltage will lengthen a stored bunch, thus extending the Touschek lifetime that is limiting the performance of the VUV ring. Beam-induced 211-MHz power in a fourth-harmonic cavity was used to check the feasibility of this concept. The data obtained during UV studies at the NSLS (National Synchrotron Light Source) are summarized
Keywords :
beam handling equipment; beam handling techniques; light sources; physical instrumentation control; storage rings; synchrotrons; 211 MHz; NSLS; National Synchrotron Light Source; Touschek lifetime; UV studies; VUV ring; bucket potential; bunch lengthening control; fourth harmonic cavity; harmonic component; stored bunch; synchronous voltage; synchrotron storage ring; Acceleration; Copper; Optical coupling; Particle beams; Power system harmonics; Radio frequency; Resonant frequency; Shape control; Synchrotrons; Voltage;
Conference_Titel :
Particle Accelerator Conference, 1989. Accelerator Science and Technology., Proceedings of the 1989 IEEE
Conference_Location :
Chicago, IL
DOI :
10.1109/PAC.1989.73038
