Author: Kondo, Y.
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TUPMY002 APF IH-DTL Design for the Muon LINAC in the J-PARC Muon g-2/EDM Experiment 1539
 
  • M. Otani, T. Mibe, M. Yoshida
    KEK, Ibaraki, Japan
  • K. Hasegawa, Y. Kondo
    JAEA, Ibaraki-ken, Japan
  • N. Hayashizaki
    RLNR, Tokyo, Japan
  • Y. Iwashita
    Kyoto ICR, Uji, Kyoto, Japan
  • Y. Iwata
    NIRS, Chiba-shi, Japan
  • R. Kitamura
    University of Tokyo, Tokyo, Japan
  • N. Saito
    J-PARC, KEK & JAEA, Ibaraki-ken, Japan
 
  The muon linac for the J-PARC muon g-2/EDM experiment consists of RFQ (324 MHz), IH-DTL (324 MHz), DAW coupled cell linac (1.3 GHz), and disk loaded structure (1.3 GHz). Because muon has finite life time, the muons should be accelerated in a sufficiently short period. To realize fast acceleration, Alternative Phase Focusing (APF) scheme is adopted in IH-DTL in which the muons are accelerated from 0.34 MeV to about 4 MeV. In this poster, the design of the APF IH-DTL for muon acceleraiton with the computer calculation will be presented.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMY002  
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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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TUPMY003 Development of Muon LINAC for the Muon g-2/EDM Experiment at J-PARC 1543
 
  • M. Otani, T. Mibe, F. Naito, N. Saito, M. Yoshida
    KEK, Ibaraki, Japan
  • K. Hasegawa, T. Ito, Y. Kondo
    JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan
  • N. Hayashizaki
    RLNR, Tokyo, Japan
  • Y. Iwashita
    Kyoto ICR, Uji, Kyoto, Japan
  • Y. Iwata
    NIRS, Chiba-shi, Japan
  • R. Kitamura
    University of Tokyo, Tokyo, Japan
 
  Precision measurements of the muon's anomalous magnetic moment (g-2) and electric dipole moment (EDM) are effective ways to cast light on beyond the standard model of elementary particle physics. The J-PARC E34 experiment aims to measure g-2 with a precision of 0.1 ppm and search for EDM with a sensitivity to 10-{-21} e· cm with high intensity proton beam at J-PARC and a novel technique of making a muon beam with small emittance (the ultra-cold muon beam). The ultra-cold muon beam is generated from a surface muon beam by the thermal muonium (30 meV) production followed by the laser ionization, and acceleration to 212 MeV or 300 MeV/c by the muon dedicated LINAC. The muon LINAC consists of RFQ, inter-digital IH, Disk And Washer (DAW) coupled cell and disk loaded structure. The ultra-cold muons will have an extremely small transverse momentum spread of less than 1 % with a normalized transverse emittance of around 1.5 pi mm-mrad. The muon acceleration to 300 MeV/c will be the first case in the world and it will be one of the base technologies of future accelerator programs. In this talk, design and status of the muon LINAC will be reported.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMY003  
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