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Title: Event counting alpha detector

An electrostatic detector for atmospheric radon or other weak sources of alpha radiation. In one embodiment, nested enclosures are insulated from one another, open at the top, and have a high voltage pin inside and insulated from the inside enclosure. An electric field is produced between the pin and the inside enclosure. Air ions produced by collision with alpha particles inside the decay volume defined by the inside enclosure are attracted to the pin and the inner enclosure. With low alpha concentrations, individual alpha events can be measured to indicate the presence of radon or other alpha radiation. In another embodiment, an electrical field is produced between parallel plates which are insulated from a single decay cavity enclosure.
 [1];  [1]
  1. (Los Alamos, NM)
Issue Date:
OSTI Identifier:
Regents of University California (Oakland, CA) LANL
Patent Number(s):
US 5550381
Contract Number:
Research Org:
Los Alamos National Laboratory (LANL), Los Alamos, NM
Country of Publication:
United States
event; counting; alpha; detector; electrostatic; atmospheric; radon; weak; sources; radiation; embodiment; nested; enclosures; insulated; top; voltage; inside; enclosure; electric; field; produced; air; collision; particles; decay; volume; defined; attracted; inner; concentrations; individual; events; measured; indicate; presence; electrical; parallel; plates; single; cavity; decay cavity; volume defined; electrical field; electric field; alpha radiation; alpha particle; alpha particles; alpha detector; atmospheric radon; parallel plates; parallel plate; inner enclosure; event count; /250/