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Compact, ionising ray-generating source, assembly comprising a plurality of sources and method for producing the source

A technology of ionizing radiation and components, which is applied in the parts, electrical components, and X-ray tubes of X-ray tubes, and can solve problems such as increasing the size of X-ray tubes.

Active Publication Date: 2020-03-06
THALES SA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The need for this dissipation also requires an increase in the size of the x-ray tube

Method used

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  • Compact, ionising ray-generating source, assembly comprising a plurality of sources and method for producing the source
  • Compact, ionising ray-generating source, assembly comprising a plurality of sources and method for producing the source
  • Compact, ionising ray-generating source, assembly comprising a plurality of sources and method for producing the source

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Embodiment Construction

[0057] figure 1 The X-ray generating source 10 is shown in cross section. The source 10 includes a vacuum chamber 12 in which a cathode 14 and an anode 16 are positioned. The cathode 14 is intended to emit an electron beam 18 into the chamber 12 in the direction of the anode 16 . Anode 16 includes a target 20 which is bombarded by beam 18 and, depending on the energy of electron beam 18 , emits X-rays 22 . Beam 18 is generated about axis 19 through cathode 14 and anode 16 .

[0058] X-ray generating tubes conventionally employ thermionic cathodes operating at high temperatures, typically around 1000°C. This type of cathode is often called a hot cathode. This type of cathode consists of a metal or metal oxide matrix that emits a flux of electrons caused by atomic vibrations due to high temperatures. However, hot cathodes suffer from a number of disadvantages, such as the slow dynamic response of the current to control related to the time constant of the thermal process, an...

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Abstract

The invention relates to a source generating ionising rays, and in particular X-rays, an assembly comprising a plurality of sources and a method for producing the source. The ionising ray-generating source comprises: a vacuum chamber (12), a cathode (14) capable of emitting an electron beam (18) in the vacuum chamber (12), an anode (16) receiving the electron beam (18) and comprising a target (20)capable of generating an ionising radiation (22) from the energy received from the electron beam (18), and an electrode (24) arranged in the vicinity of the cathode (14) and forming a Wehnelt electrode. According to the invention, the electrode (24) is composed of a conductive surface adhering to a concave face (26) of a dielectric material.

Description

technical field [0001] The invention relates to a source for generating ionizing radiation and in particular X-rays, to an assembly comprising a plurality of sources, and to a method for producing the source. Background technique [0002] X-rays currently have many uses, especially in imaging and radiation therapy. X-ray imaging is widely used, especially in the medical field, in industry for performing non-destructive testing, and in the security field for detecting hazardous materials or objects. [0003] Great progress has been made in producing images from X-rays. Initially only photosensitive films were used. Later, digital detectors appeared. These detectors associated with the software package allow fast reconstruction of 2D or 3D images with the aid of a scanner. [0004] On the contrary, since 1895 Roentgen X-ray generators have changed very little since the discovery of X-rays. The advent of synchrotrons after World War II allowed for the generation of inten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J35/14H01J35/06
CPCH01J35/065H01J35/147H01J35/066H01J35/14H01J35/112H01J2235/02H01J35/153H01J9/12
Inventor P·波拉德
Owner THALES SA
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