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https://doi.org/10.18429/JACoW-IPAC2014-MOPRI010
Title Laser Ablation Ion Source for the KEK Digital Accelerator
Authors
  • N. Munemoto
    Department of Energy Sciences, Tokyo Institute of Technology, Yokohama, Japan
  • Y. Fuwa, S. Ikeda, M. Kumaki
    RIKEN, Saitama, Japan
  • Y. Fuwa
    Kyoto ICR, Uji, Kyoto, Japan
  • S. Ikeda, K. Takayama
    TIT, Yokohama, Japan
  • M. Kumaki
    RISE, Tokyo, Japan
  • M. Okamura
    BNL, Upton, Long Island, New York, USA
  • S. Takano, K. Takayama
    KEK, Ibaraki, Japan
  • K. Takayama
    Sokendai, Ibaraki, Japan
Abstract KEK Digital Accelerator (DA) is a small scale induction synchrotron and operated at 10Hz and recently has succeeded to accelerate gaseous ions*. There is a strong demand of fully striped carbon ions because the DA is regarded as the second generation of cancer therapy driver, which does not require an injector and electron stripper. We need a novel carbon ion source providing C⁶⁺ beams, which are directly injected into the DA and accelerated up to required energy. For this purpose, a laser ablation ion source(LAIS) is promising**. To obtain high yield C⁶⁺ ions from ablation plasma, the laser irradiation condition has been evaluated and relationship between beam properties of charge spectrum, intensity, and temperature, and carbon target materials were examined. Two laser systems, long pulse (6 ns) and short pulse (170 ps), were employed to irradiate a graphite and amorphous carbon target. The current densities and profile of the generated plasmas in time were measured and charge state distributions were analyzed. In addition we will report a full design integrating this LAIS, the extraction system, the longitudinal chopper system, and the low energy beam transport line.
Footnotes & References * T.Yoshimoto et al., presented in this conference
** N.Munemoto et al., Proceedings of ICIS2013, published in Rev. Sci. Inst.
Paper download MOPRI010.PDF [1.164 MB / 3 pages]
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Conference IPAC2014, Dresden, Germany
Series International Particle Accelerator Conference (5th)
Proceedings Link to full IPAC2014 Proccedings
Session Poster Session, Ribery Area
Date 16-Jun-14   16:00–18:00
Main Classification 03 Particle Sources and Alternative Acceleration Techniques
Sub Classification T01 Proton and Ion Sources
Keywords ion, laser, extraction, space-charge, simulation
Publisher JACoW Publishing, Geneva, Switzerland
Editors Christine Petit-Jean-Genaz (CERN, Geneva, Switzerland); Gianluigi Arduini (CERN, Geneva, Switzerland); Peter Michel (HZDR, Dresden, Germany); Volker RW Schaa (GSI, Darmstadt, Germany)
ISBN 978-3-95450-132-8
Published July 2014
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Copyright © 2014 by JACoW, Geneva, Switzerland     CC-BY Creative Commons License
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