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    STP1398

    A Laser Compton-Scattered Photon Source for Potential Calibration of Gamma-Ray Detectors in the Energy Range from 2 to 22 MeV

    Published: 0


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    Abstract

    A laser-Compton-scattered (LCS) photon beam was used as the source of quasimonoenergetic photons in the energy range from 2 to 22 MeV. Second-harmonic light (527 nm) from a Nd:YLF laser was guided into the interaction region in a electron storage ring, TERAS (800 MeV, 300 mA). High energy photons back-scattered by relativistic electrons were collimated by a lead collimator with a reentrant hole 2 mm in diameter. The photon fluence was measured by a large coaxial Ge detector. To determine the energy distribution of a photon beam and the response function of a Ge detector, the EGS4/PRESTA-CG code was used taking into account the precise overall computational model. Results showed that, at a photon energy of 5.965 MeV, the calculated pulse height spectra agreed very well with experimental data.

    Keywords:

    laser-Compton scattered photons, EGS4, gamma-ray detector, coaxial Ge detector, photon fluence, electron storage ring, pulse height spectra


    Author Information:

    Kudo, K
    Senior Researchers, Electrotechnical Laboratory, Ibaraki,

    Takeda, N
    Senior Researchers, Electrotechnical Laboratory, Ibaraki,

    Ohgaki, H
    Senior Researchers, Electrotechnical Laboratory, Ibaraki,

    Toyokawa, H
    Senior Researchers, Electrotechnical Laboratory, Ibaraki,


    Committee/Subcommittee: E10.12

    DOI: 10.1520/STP13662S