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Apparatus and method for radiation detection

A device, detector technology, used in the measurement of radiation, radiation intensity measurement, X/γ/cosmic radiation measurement, etc.

Inactive Publication Date: 2007-11-21
XCOUNTER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, these detectors, which involve interactions between photons and gas atoms, need to be quite deep and include pressurized air

Method used

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  • Apparatus and method for radiation detection
  • Apparatus and method for radiation detection
  • Apparatus and method for radiation detection

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Embodiment Construction

[0019] In the following description, for purposes of explanation and not limitation, specific details are set forth such as specific dimensions and materials in order to provide a thorough understanding of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details.

[0020] A preferred embodiment of the invention is described with reference to FIG. 1 , in which the apparatus for planar beam radiography is schematically illustrated with a sectional view in a plane orthogonal to the plane of the planar X-ray beam 1 .

[0021] The device comprises an X-ray source (not shown) which together with a collimator window 5 generates a fan-shaped X-ray beam 1 for irradiating the object to be imaged. The collimator window 5 may be replaced by other means for forming a substantially planar X-ray beam, such as X-ray diffracting mirrors or X-ray lenses or the like.

[0022] T...

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Abstract

The present invention relates to an apparatus for detection of radiation comprising a photocathode layer adapted to release photoelectrons in dependence on incident radiation; a radiation entrance arranged such that a beam of radiation can be entered into the apparatus through said radiation entrance and can impinge on said photocathode layer at grazing incidence; an electron avalanche amplifier adapted to avalanche amplify photoelectrons released from said photocathode layer; and a readout arrangement 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.

Description

technical field [0001] The present invention generally relates to an apparatus and method for detecting radiation. [0002] The present invention finds use in a variety of fields, including medical radiology, computed tomography (CT), microscopy, and noninvasive testing. Background technique [0003] Gas detectors are generally very attractive at photon energies below about 10 KeV. The main advantages of gas detectors are that they are cheap to manufacture compared to solid-state detectors, and they can greatly amplify the signal amplitude (several orders of magnitude) using gas amplification. However, gas detectors are less attractive at energies above 10 KeV, since the blocking ability of gases decreases rapidly with increasing photon energy. A severe reduction in spatial resolution results due to the parallax of the transition point of the often diverging radiation incident beam and the extended trajectories of so-called long-distance photons as a result of X-ray absorp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01T1/28H01J43/02G01N23/04G01T1/00G01T1/18G01T1/185H01J29/38H01J47/06
CPCG01T1/185H01J43/02
Inventor T·弗兰克V·佩斯科夫
Owner XCOUNTER
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