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Title: Background canceling surface alpha detector

A background canceling long range alpha detector which is capable of providing output proportional to both the alpha radiation emitted from a surface and to radioactive gas emanating from the surface. The detector operates by using an electrical field between first and second signal planes, an enclosure and the surface or substance to be monitored for alpha radiation. The first and second signal planes are maintained at the same voltage with respect to the electrically conductive enclosure, reducing leakage currents. In the presence of alpha radiation and radioactive gas decay, the signal from the first signal plane is proportional to both the surface alpha radiation and to the airborne radioactive gas, while the signal from the second signal plane is proportional only to the airborne radioactive gas. The difference between these two signals is proportional to the surface alpha radiation alone. 5 figs.
Inventors:
; ;
Issue Date:
OSTI Identifier:
242585
Assignee:
Univ. of California, Oakland, CA (United States) PTO; SCA: 440101; PA: EDB-96:095269; SN: 96001600382
Patent Number(s):
US 5,525,804/A/
Application Number:
PAN: 8-382,333; TRN: 96:013087
Contract Number:
W-7405-ENG-36
Resource Relation:
Other Information: PBD: 11 Jun 1996
Research Org:
University of California
Country of Publication:
United States
Language:
English
Subject:
44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; SURFACE CONTAMINATION MONITORS; DESIGN; ALPHA DETECTION; BACKGROUND RADIATION; ELECTRIC POTENTIAL

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