• K. Yoshimura, Y. Hashimoto, Y. Igarashi
  KEK, Ibaraki
• M. Aoki
  Osaka University, Osaka

Proton beam extinction, defined as a ratio of the residual and the pulse beam intensity, should be less than 10^-9, which is one of the key requirements to realize the future muon electron conversion experiment (COMET) proposed at J-PARC. Measurement of the pulse timing structure with enough sensitivity is the first step to achieve the required extinction level. We have developed two methods for the measurements; one by using fast-extracted beam and the other by using slow-resonant-extracted beam. This paper describes the schemes and the results of the measurements*. These measurements would provide important information on the beam pulse structure to understand not only for MR beam but also the whole accelelator complex, including LINAC and booster RCS.

*Submitted on behalf of the muon working group