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Title: Event counting alpha detector

An electrostatic detector is disclosed 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. 6 figs.
Inventors:
;
Issue Date:
OSTI Identifier:
372580
Assignee:
Univ. of California, Oakland, CA (United States) PTO; SCA: 540130; PA: EDB-96:145270; SN: 96001644970
Patent Number(s):
US 5,550,381/A/
Application Number:
PAN: 8-333,020; TRN: 96:023335
Contract Number:
W-7405-ENG-36
Resource Relation:
Other Information: PBD: 27 Aug 1996
Research Org:
University of California
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; AIR POLLUTION MONITORS; DESIGN; RADON; AIR POLLUTION MONITORING; ALPHA DETECTION; ELECTRIC POTENTIAL

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