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Photon flux and spectrum of γ-rays Compton sources

Abstract : We analyze the characteristics of the γ radiation produced by Compton back-scattering of a high brightness electron beam produced by a photoinjector and accelerated in a linac up to energies of 360-720 MeV and a laser operated at about 500 nm, by comparing classical and quantum models and codes. The interaction produces γ rays in the range 4.9-18.8 MeV. In view of the application to nuclear resonance fluorescence a relative bandwidth of few 10−3 is needed. The bandwidth is reduced by taking advantage of the frequency-angular correlation typical of the phenomenon and selecting the radiation in an angle of tens of μrads. The foreseen spectral density is 20-6 photons per eV in a single shot, a number that can be increased by developing multi-bunch techniques and laser recirculation. In this way a final value of 104 photon per eV per second can be achieved.
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Submitted on : Friday, July 27, 2012 - 10:51:18 AM
Last modification on : Wednesday, September 16, 2020 - 4:20:00 PM





V. Petrillo, A. Bacci, R. Ben Ali Zinati, I. Chaikovska, C. Curatolo, et al.. Photon flux and spectrum of γ-rays Compton sources. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Elsevier, 2012, 693, pp.109-116. ⟨10.1016/j.nima.2012.07.015⟩. ⟨in2p3-00721307⟩



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