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A shielded x-ray radiation apparatus

A radiation device and X-ray technology, which is applied to X-ray tubes, shielding, parts of X-ray tubes, etc., can solve the problem of increasing the total mass of shielding

Pending Publication Date: 2020-02-11
澳洲快索有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this approach increases the overall mass of shielding required

Method used

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  • A shielded x-ray radiation apparatus
  • A shielded x-ray radiation apparatus
  • A shielded x-ray radiation apparatus

Examples

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Embodiment Construction

[0079] figure 1 An example of a shielded X-ray radiation device 100 is shown, which is configured to operate with an end point energy that may vary in the range of 8-14 MeV. The maximum X-ray dose rate delivered by the X-ray generator (not shown) varied from 160 Sv / min at an operating energy of 8 MeV to 25 Sv / min at an operating energy of 14 MeV.

[0080]The shielded X-ray radiation apparatus 100 includes X-ray attenuating shields 110 and 111 , neutron attenuating shields 120 and 121 , and gamma attenuating shields 130 and 131 . The X-ray attenuating shield comprises a cavity 106 approximately 1.5 m in length to accommodate a LINAC (not shown). The LINAC accelerates an electron beam 101 onto a conversion target 102, producing bremsstrahlung X-ray radiation directed substantially in the direction of the electron beam. In use, X-ray radiation irradiates the sample 103 .

[0081] The cavity 106 housing the front of the LINAC, the conversion target 102 and the sample 103 is sub...

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Abstract

A shielded X-ray radiation apparatus is provided comprising an X-ray source, an X-ray attenuation shield including an elongate cavity to house the X-ray source and incorporating a region to accommodate a sample, a neutron attenuation shield, and a gamma attenuation shield. The neutron attenuation shield is situated adjacent to and substantially surrounds the X-ray attenuation shield and the gammaattenuation shield is adjacent to and substantially surrounds the neutron attenuation shield. In some embodiments a removable sample insertion means is provided to insert samples into the elongate cavity and which is composed of adjacent blocks of material, each respective block having a thickness and a composition which substantially matches the thickness and a composition of one of the X-ray attenuation, neutron attenuation and gamma-ray attenuation shields.

Description

technical field [0001] Embodiments described herein generally relate to shielding devices for shielding high energy, high power X-ray sources. Here, high energy means X-rays with energies in the multi-MeV energy range. In particular, embodiments relate to an apparatus for shielding an X-ray source intended for gamma activation analysis. A particular application relates to the use of an X-ray source for the analysis of gold and other valuable elements such as silver, copper and lead in ore samples. A method for optimizing the shielding of an X-ray radiation device is also provided. Background technique [0002] Gamma Activation Analysis (GAA), also known as Photon Activation Analysis, uses a high-energy X-ray source to induce nuclear reactions in target elements in a sample, and then measures the decay radiation emitted by the activated sample to determine the concentrations of these elements. [0003] Typically, X-rays in the multi-MeV energy range are generated using sou...

Claims

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Application Information

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IPC IPC(8): G21F3/00G21F1/00G21F5/00G21F7/00H01J35/16G01N23/22
CPCG21F3/00G21F7/00H05H2006/007G01N23/221H01J2235/166G01N23/2204G01N2223/074G01N2223/1013G01N2223/1016G01N2223/204G01N2223/309G01N2223/616G21F1/08H01J35/16H01J2235/165
Inventor J·蒂克纳
Owner 澳洲快索有限公司
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