Using one reflection neutron optics system for tailoring high flux neutron beams

Borisov, G. I.; Kumakhov, M. A.

doi:10.1016/j.nima.2004.04.186

Cited by 6 publications

(2 citation statements)

References 4 publications

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“…As the source of thermal neutrons is a reactor channel which is much larger than capillary, the angular and spatial distribution of neutron flux at the capillary inlet is uniform and isotropic and the transmission of capillary according to (1) can be calculated as:…”

Section: Straight Capillariesmentioning

confidence: 99%

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<title>Estimation of neutron optical characteristics of capillaries of different shapes</title>

Borisov¹,

Kondratenko²,

Kumakhov³

2005

SPIE Proceedings

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Calculation of neutron optical system characteristics should be done with regard to the fact that the sources of thermal neutrons are lengthy objects. Hence, when neutrons pass through the capillaries in neutron optical system (CNOS), there may be a considerable contribution to the total fluence, made by neutrons going along helix-shaped trajectories with angle with the capillary axis exceeding the critical reflection angle. Algorithm has been developed permitting calculation of capillaries' transmission, impact of bending capillaries and their radius variation along the length, as well as angular distribution of radiation output. Monte-Carlo method allows calculation of capillaries with any shape of radius variations. Comparison of calculated and experimental data provides assessment of the quality of CNOS manufacture.

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Section: Straight Capillariesmentioning

confidence: 99%

“…Transmission of CNOS can be defined from the following equation: hS.Tth.J. (1) Here h the total output fluence of thermal neutrons, S is the total area of capillary inlet holes, ço is the neutron flux density at the neutron source and ço is the critical reflection angle that for thermal neutron and glass equals 2 .…”

Section: Introductionmentioning

confidence: 99%