Analytic calculation of ellipticity error effect in neutron penumbral imaging

hao yi-dan; miao wen-yong; zhao zong-qing; yuan yong-teng

Volume 19 Issue 03

Mar. 2007

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Article Navigation > High Power Laser and Particle Beams > 2007 > 19(03): 0-

wang kun-peng, zhang jian-xiu, fang chang-shui, et al. First-principle studies of the effects of K vacancy in KDP crystals upon laser-induced damage[J]. High Power Laser and Particle Beams, 2006, 18.

Citation:

hao yi-dan, miao wen-yong, zhao zong-qing, et al. Analytic calculation of ellipticity error effect in neutron penumbral imaging[J]. High Power Laser and Particle Beams, 2007, 19.

wang kun-peng, zhang jian-xiu, fang chang-shui, et al. First-principle studies of the effects of K vacancy in KDP crystals upon laser-induced damage[J]. High Power Laser and Particle Beams, 2006, 18.

Citation:

hao yi-dan, miao wen-yong, zhao zong-qing, et al. Analytic calculation of ellipticity error effect in neutron penumbral imaging[J]. High Power Laser and Particle Beams, 2007, 19.

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Analytic calculation of ellipticity error effect in neutron penumbral imaging

1.
Research Center of Laser Fusion,CAEP,P.O.Box 919-986,Mianyang 621900,China;
2.
Department of Engineering Physics,Tsinghua University,Beijing 100084,China

Publish Date: 2007-03-15

Abstract

Abstract

Using a geometrical optical method, a model for analytic calculation about ellipticity error effect in neutron penumbral imaging is established. An analytic formula of neutron absorbing length is derived from the model, and a general analytical expression for neutron penumbral imaging process is achieved. Based on this model, a numerical simulation of image aberration caused by ellipticity error is realized. The point spread functions under various ellipticity errors and their effects on a round object’s reconstruction are obtained. A semi-quantitative result shows that the effect on imaging quality can be omitted when the ellipticity error is less than 0.01. Compared with the Monte-Carlo method, the analytic model is more effective in computation and easy to apply to other similar code i
- penumbral imaging technique,
- analytic model,
- modulated transfer function,
- ellipticity

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