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A 2.8 K cryogen-free cryostat with compact optical geometry for multiple photon counting

Abstract : Interest in solid scintillators down to liquid helium temperature and below has grown recently, fuelled by searches for exotic processes in particle physics. We describe a closed-cycle optical cryostat with a 2.8 K base temperature and a compact optical geometry for multiple photon counting. The large numerical aperture achieved, of the order of 0.79 from the optical center to each of the two windows and amounting to 40% of the total solid angle, allows a significant gain in the efficiency of photon collection. This and the relatively big sample size that can be used facilitate the study of scintillators under gamma irradiation. These features should be an asset for multiple photon counting techniques at low temperatures
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http://hal.in2p3.fr/in2p3-00399890
Contributor : Dominique Girod <>
Submitted on : Monday, June 29, 2009 - 1:16:27 PM
Last modification on : Wednesday, March 25, 2020 - 10:16:08 AM

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M.-A. Verdier, P.C.F. Di Stefano, F. Bonte, B. Bret, M. de Jésus, et al.. A 2.8 K cryogen-free cryostat with compact optical geometry for multiple photon counting. Review of Scientific Instruments, American Institute of Physics, 2009, 80, pp.046105. ⟨10.1063/1.3116443⟩. ⟨in2p3-00399890⟩

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