Apparatus and method for radiation detection

Details Apparatus and method for radiation detection Apparatus and method for radiation detection

G - Physics

01

T

G01T 1/28 (2006.01) H01J 43/02 (2006.01) G01N 23/04 (2006.01)

Patent

CA 2410495

The present invention relates to an apparatus (9) for detection of radiation comprising a photocathode (18) adapted to release photoelectrons in dependence on incident radiation; a radiation entrance (33) arranged such that a beam (1) of radiation can be entered into the apparatus through said radiation entrance and can impinge on said photocathode at grazing incidence; an electron avalanche amplifier (21, 27, 29, 53) adapted to avalanche amplify photoelectrons released from said photocathode; and a readout arrangement (27, 29) adapted to detect avalanche amplified electrons from said amplifier. The invention further relates to a corresponding method for detection of ionizing radiation and to an arrangement for use in planar beam radiography comprising the detector apparatus.

La présente invention concerne un dispositif (9) de détection de rayonnements comprenant: une photocathode (18) conçue pour libérer des photo-électrons en fonction du rayonnement incident; une entrée de rayonnement (33) agencée de telle sorte qu'un faisceau (1) de rayonnement puisse pénétrer dans le dispositif par ladite entrée pour aller frapper la photocathode par incidence rasante; un amplificateur d'avalanche électronique (21, 27, 29, 53) fait pour amplifier en avalanche les photo-électrons libérés par ladite photocathode; et un affichage (27, 29) étudié pour détecter des électrons amplifiés en avalanches par ledit amplificateur. L'invention concerne également un procédé connexe de détection de rayonnement ionisant et un agencement utilisé en radiographie à faisceau planaire avec ledit dispositif de détection.

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