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Gas-based detector for ionizing radiation and method in manufacturing the same

An ionizing radiation and detector technology, applied in the field of ionizing radiation detection, can solve the problems of harmful electronic equipment of detectors, hindering detectors, etc.

Inactive Publication Date: 2009-06-17
XCOUNTER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] This sparkover hampers the detector for a period of time and is also detrimental to the detector and especially to the electronics therein

Method used

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  • Gas-based detector for ionizing radiation and method in manufacturing the same
  • Gas-based detector for ionizing radiation and method in manufacturing the same
  • Gas-based detector for ionizing radiation and method in manufacturing the same

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Embodiment Construction

[0023] figure 1 is a sectional view in a plane which is orthogonal to the plane of a flat fan-shaped X-ray beam 1 of the flat-beam radiography apparatus according to the first embodiment of the present invention. The device comprises an X-ray source 3 which, together with a narrow window 5 of a first collimator, generates a planar X-ray beam 1 which illuminates an object 7 to be imaged.

[0024] The beam of radiation penetrating the object 7 enters a detector 9 . Alternatively, a narrow slit or second collimator window 11 aligned with the X-ray beam forms the entrance of the X-ray beam 1 into the detector 9 .

[0025] The detector 9 is positioned such that X-ray photons can enter from the side between the cathode assembly 17 and the anode assembly 19, between which there is a space 13 which can be filled with an ionized gas or gas mixture. A voltage U can be applied between the cathode 17 and the anode 19 by means of a high-voltage direct current power supply 7 1 , so that ...

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Abstract

A detector (9) for detecting ionizing radiation comprising a cathode (17, 41); an ionized gas placed between these electrodes; a ray entrance (33) so arranged that the ionizing radiation (1 ) has access to and ionizes the ionized gas; and a readout assembly. A voltage across the electrodes moves electrons generated during ionization of the ionized gas towards the anode, where the readout assembly (19) detects the electrons. In order to reduce the risk of sparking and / or to reduce the energy when sparking occurs, the cathode has a resistivity of at least 5 x 10 -8 The surface layer of the anode is made of Ωm material.

Description

technical field [0001] The present invention relates to gas-based detection of ionizing radiation. Background technique [0002] In general, gas-based ionizing radiation detectors are very attractive because they are cheap to produce and can take advantage of gas multiplication to significantly amplify the signal amplitude. [0003] A typical gas-based ionizing radiation detector includes a flat plate cathode and anode assembly, respectively, and an ionized gas disposed between the cathode and anode. The detector is arranged such that a radiation beam from a radiation source can enter the detector to ionize the ionized gas. In addition, a voltage is typically applied to move electrons generated during ionization of the ionized gas towards the anode. The voltage of the detector electrodes and their configuration can be adjusted such that electron multiplication is achieved, thereby inducing an enhanced charge at the anode assembly. A readout assembly, typically comprising ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01T1/185H01J47/02G01T1/18G01TG01T1/00
CPCG01T1/00H01J47/02G01T1/18G01T1/185H01J47/026
Inventor T·弗兰克J·兰塔宁C·乌尔贝里
Owner XCOUNTER
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