Radiant energy – Inspection of solids or liquids by charged particles – Including a radioactive source
Reexamination Certificate
2007-06-29
2009-12-15
Souw, Bernard E (Department: 2881)
Radiant energy
Inspection of solids or liquids by charged particles
Including a radioactive source
C250S306000, C250S307000, C250S370030, C250S370090, C250S370110, C378S004000, C378S021000, C378S022000
Reexamination Certificate
active
07633062
ABSTRACT:
A portal monitoring system has a cosmic ray charged particle tracker with a plurality of drift cells. The drift cells, which can be for example aluminum drift tubes, can be arranged at least above and below a volume to be scanned to thereby track incoming and outgoing charged particles, such as cosmic ray muons, whilst also detecting gamma rays. The system can selectively detect devices or materials, such as iron, lead, gold and/or tungsten, occupying the volume from multiple scattering of the charged particles passing through the volume and can also detect any radioactive sources occupying the volume from gamma rays emitted therefrom. If necessary, the drift tubes can be sealed to eliminate the need for a gas handling system. The system can be employed to inspect occupied vehicles at border crossings for nuclear threat objects.
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Borozdin Konstantin N.
Green J. Andrew
Hogan Gary E.
Makela Mark F.
Morris Christopher
Lambrinos Matthew F.
Lopez Kermit D.
Los Alamos National Security LLC
Ortiz Luis M.
Souw Bernard E
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