Author: Hajima, R.
Paper Title Page
WEOAA03 Approach to a Start-to-end Simulation of 2-loop Compact Energy Recovery Linac 1909
 
  • M. Shimada, K. Harada, Y. Kobayashi, T. Miyajima, N. Nakamura, S. Sakanaka
    KEK, Ibaraki, Japan
  • R. Hajima
    JAEA, Ibaraki-ken, Japan
 
  Transport of an extreme low emittance electron beam is critical issue in an energy recovery linac. In particlar, the space charge effect on an electron bunch in the injector with lower than 5 - 10 MeV induces a large emittance growth. To suppress the emittance growth by such as an optimization of the solenoid magnets, a nonlinear effect should be clarified by a three dimensional tracking simulation. The cons is that it consumes a enormous simulation time. The approach is not suitable for a double loop circulation because the simulation time depends on the transport length. Therefore the beam dynamics and optics are calculated by a start-to-end (S2E) simulation, in which the simulation code is switched after the full acceleration. We used 'general particle tracking (GPT)' for injector electron beam and 'elegant' for a circulator electron beam.  
slides icon Slides WEOAA03 [3.951 MB]  
 
THPS099 Design Study of a Nuclear Material Detection System Based on a Quasi Monochromatic Gamma Ray Generator and a Nuclear Resonance Fluorescence Gamma Ray Detection System 3666
 
  • T. Kii, T. Hori, K. Masuda, H. Ohgaki, M. Omer
    Kyoto IAE, Kyoto, Japan
  • R. Hajima, T. Hayakawa, M. Kando, T. Shizuma
    JAEA, Ibaraki-ken, Japan
  • T. Misawa, C.H. Pyeon
    KURRI, Osaka, Japan
  • H. Toyokawa
    AIST, Ibaraki, Japan
 
  Funding: This work was partially supported by Special Coordination Funds for romoting Science and Technology in Japan,
Nuclear Resonance Fluorescence (NRF) measurement is a powerful tool for isotope detection for the homeland security such as a nondestructive measurement of containers at airports or harbors and detection or identification of special nuclear materials. In this paper, we will discuss on basic design of a quasi-monochromatic gamma-ray generator based on the backward Compton scattering of laser light on high-energy electrons and an NRF gamma ray detection system using a high-speed scintillation detector.
 
 
THPS098 Compact Gamma-ray Source for Non-destructive Detection of Nuclear Material in Cargo 3663
 
  • R. Hajima
    JAEA/ERL, Ibaraki, Japan
  • I. Daito, T. Hayakawa, Y. Hayashi, M. Kando, H. Kotaki
    JAEA, Kyoto, Japan
  • T. Hori, H. Ohgaki
    Kyoto IAE, Kyoto, Japan
  • N. Kikuzawa
    JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan
  • T. Shizuma
    JAEA APRC, Ibaraki-ken, Japan
 
  Funding: This work is supported by Strategic Funds for Promotion of Science and Technology (Grant No. 066).
A mono-energetic gamma-ray source based on laser Compton scattering is under development for non-destructive detection of nuclear material in cargo. In the detection system, we employ nuclear resonance fluorescence triggered by mono-energetic gamma-rays tuned at the resonance energy of nuclear material such as U-235. As a prototype, a 150-MeV microtron combined with a YAG laser to produce a 400-keV gamma ray is constructed at JAEA, where critical technologies are to be demonstrated for high-flux gamma-ray generation, 3x105 ph/s. We also start to design a microtron at higher energy, 250 MeV, to produce a 2-MeV gamma-ray, which is required for the detection of U-235.