A New Design for Generation of Tunable Gamma-Ray With a Fixed Energy Electron Beam

A tunable quasi-monochromatic gamma-ray beam is indispensable not only for radiation measurements, but also for precise measurements of nuclear data. A design for generation of tunable quasi-monochromatic gamma-ray from the Compton backscattering of a laser light with a fixed energy electron beam ha...

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Bibliographic Details
Published in:IEEE transactions on nuclear science 2009-06, Vol.56 (3), p.1316-1320
Main Authors: Ohgaki, H., Kii, T., Toyokawa, H.
Format: Article
Language:English
Subjects:
Backscattering
Beams (radiation)
Collimators
Compton backscattering
EGS4
Electron beams
Energy (nuclear)
Gamma rays
Laser beams
Lasers
Low pass filters
Nuclear measurements
Nuclear power generation
Optical design
Particle beam measurements
Particle beams
Radiation measurement
Scattering angle
storage ring
Tunable circuits and devices
tunable gamma-ray
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Summary:A tunable quasi-monochromatic gamma-ray beam is indispensable not only for radiation measurements, but also for precise measurements of nuclear data. A design for generation of tunable quasi-monochromatic gamma-ray from the Compton backscattering of a laser light with a fixed energy electron beam has been investigated. We propose a new design (absorber- collimator scheme) by selecting the scattering angle of the Compton backscattered gamma-ray. Tunable gamma-ray can be obtained by changing the solid angle of the collimator (works as a low cut filter) and absorber (works as a high cut filter). A proof of principle experiment has been performed at the AIST-LCS beamline and the result showed that the absorber-collimator scheme could generate tunable gamma-rays. Numerical simulation based on the EGS4 well reproduced the experimental result.
ISSN:0018-9499
1558-1578
DOI:10.1109/TNS.2009.2014230