New measurements of proton beam extinction at J-parc

K. Yoshimura, Y. Hashimoto, Y. Hori, Y. Sato, M. Shimamoto, Y. Takeda, M. Uota, Y. Igarashi, H. Nishiguchi, S. Mihara, M. Aoki, H. Nakai, S. Hikida

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Proton beam extinction, defined as a residual to primary ratio of beam intensity, is one of the most important parameters to realize the future muon electron conversion experiment (COMET) proposed at J-PARC. To achieve the required extinction level of 10-9, we started measuring extinction at main ring (MR) as its first step. According to the various measurements done at the different positions, empty RF buckets of RCS, which were considered to be swept away by the RF chopper, contained about 10-7 ∼10 -5 of the main beam pulse due to chopper inefficiency. We have developed a new beam monitor with improved performance for further studies at the abort line. In addition, we have started new measurements at the Hadron experimental hall by using slow-extracted beam. In this paper, we present recent results and future prospect of beam extinction measurements.

Original languageEnglish
Title of host publicationIPAC 2011 - 2nd International Particle Accelerator Conference
Pages1242-1244
Number of pages3
Publication statusPublished - Dec 1 2011
Externally publishedYes
Event2nd International Particle Accelerator Conference, IPAC 2011 - Kursaal, San Sebastian, Spain
Duration: Sep 4 2011Sep 9 2011

Publication series

NameIPAC 2011 - 2nd International Particle Accelerator Conference

Other

Other2nd International Particle Accelerator Conference, IPAC 2011
CountrySpain
CityKursaal, San Sebastian
Period9/4/119/9/11

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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  • Cite this

    Yoshimura, K., Hashimoto, Y., Hori, Y., Sato, Y., Shimamoto, M., Takeda, Y., Uota, M., Igarashi, Y., Nishiguchi, H., Mihara, S., Aoki, M., Nakai, H., & Hikida, S. (2011). New measurements of proton beam extinction at J-parc. In IPAC 2011 - 2nd International Particle Accelerator Conference (pp. 1242-1244). (IPAC 2011 - 2nd International Particle Accelerator Conference).