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Operation of a fast diamond γ-ray detector at the HIγS facility

Abstract : Operations of a diamond sensor placed in a high average-intensity beam of photons with energies of a few MeV are reported. Data was taken at the HIγS facility of TUNL in parasitic mode while nuclear-physics experiments were taking place. The energies of the photons during data taking were 2, 3 and 7 MeV with circular and linear polarisations of the photon beam. The collected charge appears to be constant at these energies, which is consistent with simulations. A dedicated run with bunches of photons separated by 16 ns shows that they are unambiguously distinguished. This is possible thanks to a FWHM of the pulses measured to be about 6 ns. The results indicate that the tested apparatus fulfils the requirements for a fast monitoring detector for the ELI-NP source currently under construction, which motivates this work, and demonstrates for the first time the capabilities of such detectors in high average-intensity photon beams.
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Submitted on : Friday, June 10, 2016 - 2:49:21 PM
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T. Williams, C. N'Diaye, D. Breton, K. Cassou, K. Dupraz, et al.. Operation of a fast diamond γ-ray detector at the HIγS facility. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Elsevier, 2016, ⟨10.1016/j.nima.2016.06.014⟩. ⟨in2p3-01330368⟩



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