Photomultiplier and detection systems

Patent metadata

Field	Value
Publication number	US-8993970-B2
Application number	US-201314082658-A
Country	US
Kind code	B2
Filing date	Nov 18, 2013
Priority date	Jun 11, 2008
Publication date	Mar 31, 2015
Grant date	Mar 31, 2015

Abstract

The invention provides a switchable photomultiplier switchable between a detecting state and a non-detecting state including a cathode upon which incident radiation is arranged to impinge. The photomultiplier also includes a series of dynodes arranged to amplify a current created at the cathode upon detection of photoradiation. The invention also provides a detection system arranged to detect radiation-emitting material in an object. The system includes a detector switchable between a detecting state in which the detector is arranged to detect radiation and a non-detecting state in which the detector is arranged to not detect radiation. The system further includes a controller arranged to control switching of the detector between the states such that the detector is switched to the non-detecting state while an external radiation source is irradiating the object.

First claim

I claim:

1. An inspection system for scanning an object for threat materials comprising:
a plurality of passive detectors configured to detect passive radiation emitted from material in the scanned object;
an active detection system comprising a radiation source to irradiate the scanned object and a plurality of active detectors configured to detect radiation emitted by said radiation source after it passes through and/or is scattered by the scanned object; and
a control syste…

Assignees

• Rapiscan Systems Inc

Inventors

• Morton Edward James

Classifications

• G01V5/0091

  Physics · mapped topic

• G01T1/208

  Physics · mapped topic

• H01J43/08

  Electricity · mapped topic

• G01T3/06

  Physics · mapped topic

• G01T1/167 Primary

  Physics · mapped topic