Particle detector with particle trapping device

Details Particle detector with particle trapping device Particle detector with particle trapping device

2007-06-11

2009-10-20

Lee, John R (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S576000, C250S288000, C356S336000, C073S865500, C324S071400

Reexamination Certificate

active

07605389

ABSTRACT:
A particle detector includes an input port for receiving gas and particulate matter. A charging source generating positively and negatively charged species that charges at least some particulate matter in charging region, thereby generating a plurality of charged particles. A trapping region is formed having a potential energy minimum that attracts and confines the plurality of charged particles. A detector detects charged particles in the trapping region.

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patent: 6553849 (2003-04-01), Scofield et al.
patent: 7119331 (2006-10-01), Chang et al.
patent: 7123361 (2006-10-01), Doughty
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patent: 2005/0029448 (2005-02-01), Chang et al.
patent: 2006/0043282 (2006-03-01), Hidalgo et al.
patent: 2008/0156984 (2008-07-01), Makarov et al.

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