| Paper |
Title |
Page |
| WEPLT115 |
A Study of Transverse Resonance Crossing in FFAG
|
2116 |
| |
- M. Aiba
University of Tokyo, Tokyo
- S. Machida, Y. Mori
KEK, Ibaraki
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A study of "resonance crossing" in FFAG accelerator is described in this paper. A deviation of FFAG guiding field in actual magnet breaks zero chromaticity condition, and tunes cross resonance while acceleration. In order to avoid a critical beam loss or emittance growth, nominal tune should be chosen so as not to cross low-order resonances. However, crossing higher order resonance can be critical and that depends on the parameters such as crossing speed, excitation magnitude and initial beam emittance. We will present analytical model and simulation study in various parameter space.
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| THPLT066 |
Commissioning of 150MeV FFAG Synchronisation
|
2640 |
| |
- Y. Yonemura, M. Matoba
Kyushu University, Fukuoka
- M. Aiba, M. Sugaya
University of Tokyo, Tokyo
- S. Machida, Y. Mori, A. Muto, J. Nakano, C. Ohmori, I. Sakai, Y. Sato, A. Takagi, T. Yokoi, M. Yoshii, M. Yoshimoto, Y. Yuasa
KEK, Ibaraki
- T. Uesugi
NIRS, Chiba-shi
- A. Yamazaki
LNS, Sendai
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A 150MeV proton FFAG (Fixed Field Alternating Gradient) synchrotron has been constructed to be a prototype for various applications such as proton beam therapy. At the moment, all the components are assembled, and multi-turn injection and beam storage were successfully performed. We are in the phase of beam acceleration up to final energy and expect the beam extraction in a few months. In this paper, beam commissioning results such as multi-turn injection, orbit correction, tune survey and optimization of RF gymnastics will be presented.
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