Author: Matsumoto, H.
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MOPOY026 Baseline Design of a Proton Linac for BNCT at OIST 906
  • Y. Kondo, K. Hasegawa
    JAEA/J-PARC, Tokai-mura, Japan
  • Y. Higashi, H. Sugawara, M. Yoshioka
    OIST, Onna-son, Okinawa, Japan
  • H. Kumada
    Tsukuba University, Graduate School of Comprehensive Human Sciences, Ibaraki, Japan
  • S.-I. Kurokawa
    Cosylab, Tsukuba, Japan
  • H. Matsumoto, F. Naito
    KEK, Ibaraki, Japan
  A new facility to develop a proton linac based neutron source for boron neutron capture therapy (BNCT) and various neutron science is planned at Okinawa institute of science and technology (OIST). This facility aims to develop a prototype system of the mass production model of BNCT systems as medical apparatus. The beam power and the beam energy at the neutron production target are assumed to about 60 kW and 10 MeV, respectively. The energy will be finally decided to optimize the ratio of necessary epi-thermal and other energy of neutron. If the energy is 10 MeV, 60 kW beam power can be achieved with a beam current of 30 mA and a duty factor of 20%. The linac consists of an ECR ion source, a two-solenoid-magnet LEBT, a four-vane RFQ, and an Alvarez DTL, which are very conventional as components of proton linac. To make the accelerator compact, we are considering to use a 400-MHz band resonant frequency. As a medical apparatus, it is required that the linac system is stable and operated easily without experts of accelerator. The design of proton linac is one of the most important issues in our development. In this paper, the baseline design of this OIST BNCT linac is described.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOY026  
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TUPMR039 The Development of a New High Field Injection Septum Magnet System for Main Ring of J-Parc 1337
  • T. Shibata, K. Ishii, H. Matsumoto, N. Matsumoto, T. Sugimoto
    KEK, Ibaraki, Japan
  • K. Fan
    HUST, Wuhan, People's Republic of China
  We are improving the Main Ring (MR) for beam power of 750 kw which is the first goal of J-PARC. The repetition period of the fast extraction must be short to 1.3 second from the current period of 2.48 second for the improvement of the beam power. It is necessary to exchange a high field injection septum magnet which will be installed at the injection line from RCS to MR and its power supply, because the current injection septum system can not be operated with 1.3 second repetition. Since confirmed the large leakage field around current circling beam line of the injection magnet, we must improve the shielding structure which make low leakage field. We started the development of the new injection septum magnet and its power supply in 2013. It can operate with 1 Hz repetition and the low leakage field which its order is 10-4 of the gap field. The new Injection septum magnet and the new power supply were constructed in Winter of 2014. We had many improvement of the magnet and power supply. We will install the new injection septum magnet system in this summer. In this presentation, we will report the detail of the results of its performance.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMR039  
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