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Comparison of specularly-reflecting mirrors for GRANIT

Abstract : The specularity of ultracold neutron reflection was compared for different “promising” surfaces, including sapphire, silica, silica with carbon (diamond-like), and copper coatings with very small roughness. The probability of total losses of ultracold neutrons (UCN) from a specular trajectory was dominated by diffusive (non-specular) elastic scattering of UCN. In all the cases considered the quality of reflection was sufficiently high for storage of UCN at specular trajectories for the first stage of GRANIT experiment.
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http://hal.in2p3.fr/in2p3-00153118
Contributor : Dominique Girod <>
Submitted on : Friday, June 8, 2007 - 1:15:22 PM
Last modification on : Friday, April 3, 2020 - 11:47:16 AM

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V.V. Nesvizhevsky, G. Pignol, K.V. Protasov, G. Quéméner, D. Forest, et al.. Comparison of specularly-reflecting mirrors for GRANIT. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Elsevier, 2007, A578, pp.435-438. ⟨10.1016/j.nima.2007.05.319⟩. ⟨in2p3-00153118⟩

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