Title :
RF accelerating system for a compact ion synchrotron
Author :
Saito, K. ; Matsuda, K. ; Nishiuchi, H. ; Umezawa, M. ; Hiramoto, K. ; Shinagawa, R.
Author_Institution :
Power & Ind. Syst. Group, Hitachi Ltd., Ibaraki, Japan
Abstract :
We have developed an RF accelerating system for a compact ion synchrotron. The RF cavity is an untuned type loaded with FINEMET cores, which have high complex permeability, high saturation flux density, and high Curie temperature properties. A new power feeding method, "multi-feed coupling," was developed to match the cavity impedance with output impedance of a solid-state RF amplifier. We have installed the RF accelerating system for a multi-purpose synchrotron at the Wakasawan Energy Research Centre in Japan. Ion beams were successfully accelerated by adjusting the RF control system using a direct digital synthesiser. For proton beam acceleration, dual-harmonics operation was effective to enhance the beam intensity due to reduction of the space-charge effect
Keywords :
accelerator RF systems; accelerator cavities; accelerator control systems; ion accelerators; synchrotrons; Curie temperature; FINEMET cores; RF accelerating system; RF cavity; RF control system; beam intensity; compact ion synchrotron; complex permeability; dual-harmonics operation; multi-feed coupling; multi-purpose synchrotron; power feeding method; proton beam acceleration; saturation flux density; solid state RF amplifier; space charge; Acceleration; Control system synthesis; Impedance; Particle beams; Permeability; Radio frequency; Radiofrequency amplifiers; Solid state circuits; Synchrotrons; Temperature;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.986542
