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Nuclear Instruments and Methods in Physics Research Research: Accelerators, Spectrometers, Detectors and Associated Equipment A578 (2007) 435-438
Comparison of specularly-reflecting mirrors for GRANIT
V.V. Nesvizhevsky1, G. Pignol2, K.V. Protasov2, G. Quéméner2, D. Forest3, P. Ganau3, J.M. Mackowski3, C. Michel3, J.L. Montorio3, N. Morgado3, L. Pinard3, A. Remillieux3
GRANIT Collaboration(s)

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.
1 :  ILL - Institut Laue-Langevin
2 :  LPSC - Laboratoire de Physique Subatomique et de Cosmologie
3 :  LMA - Laboratoire des matériaux avancés
Physique/Physique/Instrumentations et Détecteurs
Ultracold neutrons – Specular reflection – Coatings