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Title: Imaging alpha particle detector

A method and apparatus for detecting and imaging alpha particles sources is described. A conducting coated high voltage electrode (1) and a tungsten wire grid (2) constitute a diode configuration discharge generator for electrons dislodged from atoms or molecules located in between these electrodes when struck by alpha particles from a source (3) to be quantitatively or qualitatively analyzed. A thin polyester film window (4) allows the alpha particles to pass into the gas enclosure and the combination of the glass electrode, grid and window is light transparent such that the details of the source which is imaged with high resolution and sensitivity by the sparks produced can be observed visually as well. The source can be viewed directly, electronically counted or integrated over time using photographic methods. A significant increase in sensitivity over other alpha particle detectors is observed, and the device has very low sensitivity to gamma or beta emissions which might otherwise appear as noise on the alpha particle signal.
Authors:
 [1]
  1. (Los Alamos, NM)
Publication Date:
OSTI Identifier:
865504
Report Number(s):
US 4527064
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Patent
Research Org:
Los Alamos National Laboratory (LANL), Los Alamos, NM
Country of Publication:
United States
Language:
English
Subject:
imaging; alpha; particle; detector; method; apparatus; detecting; imaging; alpha; particles; sources; described; conducting; coated; voltage; electrode; tungsten; wire; grid; constitute; diode; configuration; discharge; generator; electrons; dislodged; atoms; molecules; located; electrodes; struck; alpha; particles; source; quantitatively; qualitatively; analyzed; polyester; film; window; allows; alpha; particles; pass; gas; enclosure; combination; glass; electrode; grid; window; light; transparent; details; source; imaged; resolution; sensitivity; sparks; produced; observed; visually; source; viewed; directly; electronically; counted; integrated; time; photographic; methods; significant; increase; sensitivity; alpha; particle; detectors; observed; device; sensitivity; gamma; beta; emissions; otherwise; appear; noise; alpha; particle; signal; significant increase; particle detectors; light transparent; alpha particle; alpha particle; alpha particle; alpha particle; alpha particle; alpha particle; alpha particles; alpha particles; alpha particles; particle detector; particle detector; voltage electrode; wire grid; gas enclosure; film window; imaging alpha; imaging alpha; beta emissions; discharge generator /250/