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Selective flow path alpha particle detector and method of use

United States Patent

6,455,859
September 24, 2002
View the Complete Patent at the US Patent & Trademark Office
Los Alamos National Laboratory - Visit the Technology Transfer Division Website
A method and apparatus for monitoring alpha contamination are provided in which ions generated in the air surrounding the item, by the passage of alpha particles, are moved to a distant detector location. The parts of the item from which ions are withdrawn can be controlled by restricting the air flow over different portions of the apparatus. In this way, detection of internal and external surfaces separately, for instance, can be provided. The apparatus and method are particularly suited for use in undertaking alpha contamination measurements during the commissioning operations.
Orr; Christopher Henry (Cumbria, GB), Luff; Craig Janson (Cumbria, GB), Dockray; Thomas (Cumbria, GB), Macarthur; Duncan Whittemore (Los Alamos, NM)
09/ 613,710
July 11, 2000
The U.S. Government has a paid-up license in this invention and the right in limited circumstances to require the patent owner to license others on reasonable terms as provided for by the terms of CRADA No. LA96C10298 and Contract No. W-7405-ENG-36 awarded by the U.S. Department of Energy.