Neutron polycapillary optics: back to future

Alexander loffe

doi:10.1117/12.640115

7 December 2006 Neutron polycapillary optics: back to future

Alexander loffe

Proceedings Volume 5974, International Conference on Charged and Neutral Particles Channeling Phenomena; 59741C (2006) https://doi.org/10.1117/12.640115
Event: International Conference on Charged and Neutral Particles Channeling Phenomena, 2004, Rome, Italy

Abstract

At the sunrise of the Kumakhov optics, the latter was enormously attractive for neutron scientists eager to take advantage from focused neutron beams. However, in spite of this initial enthusiasm, rear neutron applications of polycapillary optics are mostly limited either to feasibility studies or to non-scattering techniques. The reason for such a drawback is a serious degradation in the momentum resolution of neutron scattering methods caused by increased divergence of focused beams. However, limited brightness of present day neutron sources (both existing and coming) requires rethinking the current situation. Neutron lenses are successfully tested for low Q-resolution applications providing an enormous increase of neutron flux at small samples. Moreover, some recent developments in the field of neutron instrumentation allow us to overcome the resolution problem by decoupling the angular resolution and the incident beam divergence thus opening the opportunity for the use of focusing neutron optics in some high Q-resolution application. Further advances in technology required to improve the performance of neutron polycapillary optics, also in combination with modem methods of polarization of neutron beams, are discussed.

Citation Download Citation

Alexander loffe "Neutron polycapillary optics: back to future", Proc. SPIE 5974, International Conference on Charged and Neutral Particles Channeling Phenomena, 59741C (7 December 2006); https://doi.org/10.1117/12.640115

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