Characterization of a neutron sensitive MCP/Timepix detector for quantitative image analysis at a pulsed neutron source

Kenichi Watanabe, Triestino Minniti, Winfried Kockelmann, Robert Dalgliesh, Genoveva Burca, Anton S. Tremsin

研究成果: Contribution to journalArticle査読

6 被引用数 (Scopus)

抄録

The uncertainties and the stability of a neutron sensitive MCP/Timepix detector when operating in the event timing mode for quantitative image analysis at a pulsed neutron source were investigated. The dominant component to the uncertainty arises from the counting statistics. The contribution of the overlap correction to the uncertainty was concluded to be negligible from considerations based on the error propagation even if a pixel occupation probability is more than 50%. We, additionally, have taken into account the multiple counting effect in consideration of the counting statistics. Furthermore, the detection efficiency of this detector system changes under relatively high neutron fluxes due to the ageing effects of current Microchannel Plates. Since this efficiency change is position-dependent, it induces a memory image. The memory effect can be significantly reduced with correction procedures using the rate equations describing the permanent gain degradation and the scrubbing effect on the inner surfaces of the MCP pores.

本文言語英語
ページ(範囲)55-63
ページ数9
ジャーナルNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
861
DOI
出版ステータス出版済み - 7 21 2017
外部発表はい

All Science Journal Classification (ASJC) codes

  • 核物理学および高エネルギー物理学
  • 器械工学

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