Beam commissioning of the linac for iBNCT

Naito, Fujio*; Anami, Shozo*; Ikegami, Kiyoshi*; Uota, Masahiko*; Ouchi, Toshikatsu*; Onishi, Takahiro*; Oba, Toshiyuki*; Obina, Takashi*; Kawamura, Masato*; Kumada, Hiroaki*; Kurihara, Toshikazu*; Kobayashi, Hitoshi*; Sato, Yoshihiro*; Shibata, Takanori*; Shimamoto, Masayuki*; Takagi, Akira*; Takasaki, Eiichi*; Tanaka, Susumu*; Nagura, Nobuaki*; Qui, F.*; Fang, Z.*; Fujikura, Shohei*; Futatsukawa, Kenta*; Hori, Yoichiro*; Honda, Yosuke*; Maruta, Tomofumi*; Miura, Akihiko ; Miura, Taichi*; Miura, Takako*; Miyajima, Tsukasa*; Liu, Y.*

The proton linac installed in the Ibaraki Neutron Medical Research Center is used for production of the intense neutron flux for the Boron Neutron Capture Therapy (BNCT). The linac consists of the 3-MeV RFQ and the 8-MeV DTL. Design average beam current is 10mA. Target is made of Beryllium. First neutron production from the Beryllium target was observed at the end of 2015 with the low intensity beam as a demonstration. After the observation of neutron production, a lot of improvement s was carried out in order to increase the proton beam intensity for the real beam commissioning. The beam commissioning has been started on May 2016. The status of the commissioning is summarized in this report.