Abstract

The 3-GeV rapid cycling synchrotron (RCS) of the Japan Proton Accelerator Research Complex was commissioned in October 2007. Via the initial beam tuning and a series of underlying beam studies with low-intensity beams, since December 2009, we have intermittently been performing beam tuning experiments with higher-intensity beams including the injection painting technique. By optimizing the injection painting parameters, we have successfully achieved a 420 kW-equivalent output intensity at a low-level intensity loss of less than 1%. Also the corresponding numerical simulation well reproduced the observed painting parameter dependence on the beam loss, and captured a characteristic behavior of the high-intensity beam in the injection painting process. In this paper, we present the experimental results obtained in the course of the RCS beam power ramp-up, especially on the beam loss reduction achieved by employing the injection painting, together with the numerical simulation results.

Details

Title
Beam loss reduction by injection painting in the 3-GeV rapid cycling synchrotron of the Japan Proton Accelerator Research Complex
Author
Hotchi, H; Harada, H; Hayashi, N; Kinsho, M; Saha, P K; Shobuda, Y; Tamura, F; Yamamoto, K; Yamamoto, M; Yoshimoto, M
Section
ARTICLES
Publication year
2012
Publication date
Apr 2012
Publisher
American Physical Society
e-ISSN
10984402
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2551263885
Copyright
© 2012. This work is licensed under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.