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Title: Radiation detector

Abstract

Apparatus is provided for detecting radiation such as gamma rays and X-rays generated in backscatter Mossbauer effect spectroscopy and X-ray spectrometry, which has a large "window" for detecting radiation emanating over a wide solid angle from a specimen and which generates substantially the same output pulse height for monoenergetic radiation that passes through any portion of the detection chamber. The apparatus includes a substantially toroidal chamber with conductive walls forming a cathode, and a wire anode extending in a circle within the chamber with the anode lying closer to the inner side of the toroid which has the least diameter than to the outer side. The placement of the anode produces an electric field, in a region close to the anode, which has substantially the same gradient in all directions extending radially from the anode, so that the number of avalanche electrons generated by ionizing radiation is independent of the path of the radiation through the chamber.

Inventors:
 [1]
  1. (Berkeley, CA)
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
864621
Patent Number(s):
4393306
Assignee:
United States of America as represented by United States (Washington, DC) LLNL
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
radiation; detector; apparatus; provided; detecting; gamma; rays; x-rays; generated; backscatter; mossbauer; effect; spectroscopy; x-ray; spectrometry; window; emanating; wide; solid; angle; specimen; generates; substantially; output; pulse; height; monoenergetic; passes; portion; detection; chamber; toroidal; conductive; walls; forming; cathode; wire; anode; extending; circle; lying; closer; inner; toroid; diameter; outer; placement; produces; electric; field; region; close; gradient; directions; radially; avalanche; electrons; ionizing; independent; path; solid angle; pulse height; detecting radiation; detector apparatus; wire anode; walls forming; extending radially; gamma rays; gamma ray; output pulse; electric field; radiation detector; ionizing radiation; radiation emanating; toroidal chamber; region close; conductive walls; x-rays generated; extending radial; wide solid; walls form; /250/313/

Citation Formats

Fultz, Brent T. Radiation detector. United States: N. p., 1983. Web.
Fultz, Brent T. Radiation detector. United States.
Fultz, Brent T. Sat . "Radiation detector". United States. https://www.osti.gov/servlets/purl/864621.
@article{osti_864621,
title = {Radiation detector},
author = {Fultz, Brent T.},
abstractNote = {Apparatus is provided for detecting radiation such as gamma rays and X-rays generated in backscatter Mossbauer effect spectroscopy and X-ray spectrometry, which has a large "window" for detecting radiation emanating over a wide solid angle from a specimen and which generates substantially the same output pulse height for monoenergetic radiation that passes through any portion of the detection chamber. The apparatus includes a substantially toroidal chamber with conductive walls forming a cathode, and a wire anode extending in a circle within the chamber with the anode lying closer to the inner side of the toroid which has the least diameter than to the outer side. The placement of the anode produces an electric field, in a region close to the anode, which has substantially the same gradient in all directions extending radially from the anode, so that the number of avalanche electrons generated by ionizing radiation is independent of the path of the radiation through the chamber.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {1}
}

Patent:

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