Title :
Beam commissioning of a multi-purpose compact ion synchrotron
Author :
Matsuda, K. ; Saito, K. ; Nishiuchi, H. ; Umezawa, M. ; Hiramoto, K. ; Shinagawa, R. ; Tonooka, T.
Author_Institution :
Power & Ind. Syst. Group, Hitachi Ltd., Ibaraki, Japan
Abstract :
W-MAST (Wakasa-wan Energy Research Center Multipurpose Accelerator with Synchrotron and Tandem) consists of a tandem accelerator with 5 MV terminal voltage and a compact ion synchrotron. The beam commissioning was started at the beginning of 1999 and was successfully accomplished in March 2000. A proton beam of 10 MeV was injected from the tandem accelerator and accelerated by the ion synchrotron to 200 MeV during 0.6 s. In order to reduce the space charge induced tune spread, the second order harmonic component was superimposed onto the accelerating radio frequency field with an untuned accelerating cavity having FINEMET cores. The betatron tune during the acceleration was measured and controlled to improve the acceleration efficiency
Keywords :
accelerator RF systems; accelerator cavities; ion accelerators; ion beams; particle beam extraction; particle beam injection; proton accelerators; proton beams; synchrotrons; tandem accelerators; tuning; 0.6 s; 10 MeV; 200 MeV; 5 MV; FINEMET cores; W-MAST; accelerating radiofrequency field; acceleration efficiency; beam commissioning; betatron tune; carbon ion beam; electrostatic accelerator; helium ion beam; multipurpose compact ion synchrotron; proton beam injection; radiofrequency capture; second order harmonic component; space charge induced tune spread; synchrotron; tandem accelerator; terminal voltage; untuned accelerating cavity; Acceleration; Electrostatics; Ion accelerators; Ion sources; Magnets; Particle accelerators; Particle beams; Proton accelerators; Synchrotrons; Voltage;
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.2001.987841
