Neutron fibres. II. Some improving alternatives and analysis of bending losses



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Fernández Álvarez-Estrada, Ramón and Calvo Padilla, María Luisa (1986) Neutron fibres. II. Some improving alternatives and analysis of bending losses. Journal of Physics D: Applied Physics, 19 (6). pp. 957-973. ISSN 0022-3727

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For pt.I see ibid., vol.17, p.475 (1984). The possible confined propagation of slow (thermal) neutrons along cladded waveguides of small cross section (fibres) is studied, in order to improve a previously published analysis. Quite suitable possibilities for the core of the waveguide could be either Al or Si (or vacuum), so as to allow for confined propagation of neutrons along reasonable lengths, without large scattering and absorption losses. Tentative possibilities for the cladding could be either Ni or Fe. The bending losses are analysed for a curved neutron fibre in two spatial dimensions. Such bending losses turn out to be completely negligible, except in the case of a small radius of curvature Rc. To quote some typical values, for any fibre diameter between 0.1 and 1 mu m and reasonable lengths for it (between 5 and 10 cm), bending losses can be neglected other than for Rc<or approximately=10 cm.

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© 1986 The Institute of Physics
We are grateful to Dr. J. W. Fowler, from Gray Laboratory, Mount Vernon Hospital, for an interesting correspondance containing useful comments.

Uncontrolled Keywords:Applied Physics
Subjects:Sciences > Physics > Optics
ID Code:25863
Deposited On:27 Jun 2014 11:42
Last Modified:31 Dec 2020 00:03

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