RF system for high beam intensity acceleration in the CERN PS

Author

Garoby, A. ; Jamsek, J. ; Konrad, P. ; Lobeau, G. ; Nassibian, G.

Author_Institution

CERN, Geneva, Switzerland

fYear

1989

fDate

20-23 Mar 1989

Firstpage

135

Abstract

Heavy beam loading is encountered in the main RF system of the CERN Proton Synchrotron (PS). This consists of 11 ferrite loaded cavities, each one capable of developing 20 kVp between 2.6 and 10 MHz. Harmonic 20 is normally used for acceleration, and feedforward compensation has been used in the past to suppress beam loading instabilities. This technique could not satisfy the stringent requirements of the antiproton production beam for the Antiproton Collector. RF feedback around the final amplifier and the cavity has been implemented. All power amplifiers have been rebuilt, adding amplification stages and auxiliary equipment, but keeping the same high-power tetrode to drive the cavity (RS 1084 with 80-kW plate dissipation). The installation was completed in February 1988, and many different types of beams have been successfully handled since, including a record intensity of 2.34 e13 protons per pulse

Keywords

beam handling equipment; proton accelerators; synchrotrons; 2.6 to 10 MHz; Antiproton Collector; CERN PS; CERN Proton Synchrotron; RF feedback; RF system; amplification stages; antiproton production beam; auxiliary equipment; beam loading instabilities; cavity; feedforward compensation; ferrite loaded cavities; final amplifier; high beam intensity acceleration; high-power tetrode; power amplifiers; Acceleration; Feedback; Ferrites; High power amplifiers; Particle beams; Production; Protons; Radio frequency; Radiofrequency amplifiers; Synchrotrons;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1989. Accelerator Science and Technology., Proceedings of the 1989 IEEE

Conference_Location

Chicago, IL

Type

conf

DOI

10.1109/PAC.1989.73037

Filename

73037