Micro cavity fission chamber radiation detection system
Abstract
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.
- Inventors:
- Issue Date:
- Research Org.:
- US Dept. of Energy (USDOE), Washington, DC (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1892643
- Patent Number(s):
- 11255986
- Application Number:
- 15/891,479
- Assignee:
- McGregor, Douglas S. (Riley, KS)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01T - MEASUREMENT OF NUCLEAR OR X-RADIATION
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- DOE Contract Number:
- SC0017692
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 02/08/2018
- Country of Publication:
- United States
- Language:
- English
Citation Formats
McGregor, Douglas S., Fronk, Ryan G., and Reichenberger, Michael A. Micro cavity fission chamber radiation detection system. United States: N. p., 2022.
Web.
McGregor, Douglas S., Fronk, Ryan G., & Reichenberger, Michael A. Micro cavity fission chamber radiation detection system. United States.
McGregor, Douglas S., Fronk, Ryan G., and Reichenberger, Michael A. Tue .
"Micro cavity fission chamber radiation detection system". United States. https://www.osti.gov/servlets/purl/1892643.
@article{osti_1892643,
title = {Micro cavity fission chamber radiation detection system},
author = {McGregor, Douglas S. and Fronk, Ryan G. and Reichenberger, Michael A.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2022},
month = {2}
}
Works referenced in this record:
Micro neutron detectors
patent-application, December 2006
- McGregor, Dougl;as S.; Ohmes, Martin F.; Shultis, John K.
- US Patent Application 11/191345; 20060291606
Micro neutron detectors
patent-application, February 2006
- McGregor, Douglas S.; Ohmes, MArtin F.; Shultis, John K.
- US Patent Application 11/191899; 20060023828
Design considerations for thin film coated semiconductor thermal neutron detectors—I: basics regarding alpha particle emitting neutron reactive films
journal, March 2003
- McGregor, D. S.; Hammig, M. D.; Yang, Y.-H.
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 500, Issue 1-3, p. 272-308
Recent results and fabrication of micro-pocket fission detectors (MPFD)
conference, August 2006
- Ohmes, Martin F.; McGregor, Douglas S.; Shultis, J. Kenneth
- SPIE Proceedings
Development of micro-pocket fission detectors (MPFD) for near-core and in-core neutron flux monitoring
conference, January 2004
- Ohmes, Martin F.; McGregor, Douglas S.; Shultis, J. Kenneth
- Optical Science and Technology, SPIE's 48th Annual Meeting, SPIE Proceedings
Neutron detector for use within nuclear reactor
patent, October 1983
- Tomoda, Toshimasa
- US Patent Document 4,410,483
Microfactory Comb Capacitive Accelerometer
patent-application, January 2007
- Robert, Philippe
- US Patent Application 11/305200; 20070012110
Micro-pocket fission detectors (MPFD) for in-core neutron flux monitoring
journal, December 2005
- McGregor, Douglas S.; Ohmes, Martin F.; Ortiz, Rylan E.
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 554, Issue 1-3
Micro-Pocket Fission Detector (MPFD) performance characteristics
conference, October 2006
- Ohmes, Martin F.; Ahmed, A. S. M. Sabbir; Ortiz, Rylan E.
- 2006 IEEE Nuclear Science Symposium Conference Record
Fabrication and testing of a 5-node micro-pocket fission detector array for real-time, spatial, iron-wire port neutron-flux monitoring
journal, December 2017
- Reichenberger, Michael A.; Nichols, Daniel M.; Stevenson, Sarah R.
- Annals of Nuclear Energy, Vol. 110
Apparatus for measuring the neutron flux in a nuclear reactor
patent, December 1973
- Klar, Erich
- US Patent Document 3780292
Ionizing Radiation Detector and Method for Manufacturing Such a Detector
patent-application, August 2003
- Buffet, Jean-Claude; Guerard, Bruno
- US Patent Application 10/313883; 20030150999
Fabrication and testing of a 4-node micro-pocket fission detector array for the Kansas State University TRIGA Mk. II research nuclear reactor
journal, August 2017
- Reichenberger, Michael A.; Nichols, Daniel M.; Stevenson, Sarah R.
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 862
Gas-Filled Neutron Detectors Having Improved Detection Efficiency
patent-application, August 2012
- McGregor, Douglas S.; Bellinger, Steven L.; McNeil, Walter J.
- US Patent Application 13/404751; 20120217406
Mirror structure having a fourier lens disposed between a reflective surface and an integrated optical sensor
patent, August 2013
- Griffith, Michael Stewart; Laycock, Leslie Charles; Blyth, Peter
- US Patent Document 8,519,315
Fission Chamber Assembly
patent, July 1962
- Boyd, Leo R.; Bock, Richard G.
- US Patent Document 3043954
High efficiency proportional neutron detector with solid liner internal structures
patent-application, September 2012
- Brown, Gilbert M.; Holcomb, David Eugene; Kisner, Roger Allen
- US Patent Application 13/408343; 20120223242
Micro neutron detectors
patent-application, March 2006
- McGregor, Douglas S.; Ohmes, Martin F.; Shultis, John K.
- US Patent Application 11/191326; 20060056573
Gas-Filled Neutron Detectors and Imaging System and Array of Such Detectors
patent-application, September 2013
- McGregor, Douglas S.; Bellinger, Steven L.; Nelson, Kyle A.
- US Patent Application 13/773831; 20130228696
Plumbing apparatus including means for producing a water-plug effect in sanitation appliances
patent, March 1980
- Teglund, Lars; Oldani, Melchiorre
- US Patent Document 4,190,910
Micro Neutron Detectors
patent-application, March 2006
- McGregor, Douglas S.; Ohmes, Marin F.; Shultis, John K.
- US Patent Application 11/192156; 20060043308
Long-time behaviour of regenerating in-core neutron detectors with 238U−239Pu electrodes during power cycling
journal, March 1975
- Böck, H.; Balcar, E.
- Nuclear Instruments and Methods, Vol. 124, Issue 2
Miniature fission chamber and signal cable assembly
patent, February 1986
- Underwood, Richard
- US Patent Document 4,569,817