Micro cavity fission chamber radiation detection system

McGregor, Douglas S.; Fronk, Ryan G.; Reichenberger, Michael A.

Title: Micro cavity fission chamber radiation detection system

Patent · Tue Feb 22 00:00:00 EST 2022

OSTI ID:1892643

McGregor, Douglas S.; Fronk, Ryan G.; Reichenberger, Michael A.

A radiation detector to monitor the neutron flux of a nuclear reactor or other high-radiation environment, that can withstand the high temperatures and radiation fields of such environment, is provided. A small dielectric substrate with a low neutron-activation cross section is provided. The substrate is coated with a neutron conversion material, such as uranium oxide or thorium oxide. One or more substrates form a micro-sized detection cavity that is filled with a detection gas. A voltage is provided across anode and cathode wires in the detection cavity. A neutron absorbed in the conversion material may release reaction products into the gas, causing ionization of the gas which then produces a current or voltage signal. The small detector volume minimizes energy deposition into the detection gas by competing particles such as gamma rays, fast electrons, and beta particles, and therefore minimizes false counts while retaining large signals from neutron interactions.

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Research Organization:: US Dept. of Energy (USDOE), Washington, DC (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: SC0017692

Assignee:: McGregor, Douglas S. (Riley, KS)

Patent Number(s):: 11,255,986

Application Number:: 15/891,479

OSTI ID:: 1892643

Resource Relation:: Patent File Date: 02/08/2018

Country of Publication:: United States

Language:: English

References (24)

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