RFチョッパーからの漏れビーム測定

Measurement of leakage beam from RF chopper

北村 遼   ; 不破 康裕   ; 栗山 靖敏*; 宮尾 智章*

Kitamura, Ryo; Fuwa, Yasuhiro; Kuriyama, Yasutoshi*; Miyao, Tomoaki*

The source of the leakage beam from the RF chopper in the MEBT1 of the J-PARC linac should be identified to reduce the beam loss towards the upgrade of the beam power of the J-PARC accelerators. The investigation of the leakage beam was carried out using the bunch-shape monitor in the MEBT1. As for the longitudinal measurement, the sensitivity of the beam monitor is important. As for the horizontal measurement using the BSM, it is an useful method to identify the source of the leakage beam. Some findings show the complexed beam behavior in the MEBT1.