Search

CN-224204094-U - X-ray tube anode target rod and X-ray tube

CN224204094UCN 224204094 UCN224204094 UCN 224204094UCN-224204094-U

Abstract

The utility model provides an anode target rod of an X-ray tube and the X-ray tube, wherein the anode target rod of the X-ray tube comprises a target rod body, a liquid suction core layer and a working medium, the target rod body is provided with a first end face and a second end face which are oppositely arranged, the second end face is provided with an anode target face, a sealed hollow part is arranged in the target rod body, a step-shaped supporting face is arranged on the surface of the target rod body, the liquid suction core layer is positioned on the inner wall of the target rod body, which is provided with a hollow part area, the distance between the liquid suction core layer and the first end face is smaller than the distance between the supporting face and the first end face, the distance between the liquid suction core layer and the second end face is smaller than the distance between the supporting face and the second end face, and the working medium is positioned in the liquid suction core layer and can flow in the liquid suction core layer. The anode target rod comprises the target rod body, the liquid absorption core layer and the working medium, so that the axial thermal expansion of the target rod can be reduced, the focus drift phenomenon is further reduced, the difficulty in correcting focus drift by a system algorithm is reduced, and the quality and the spatial resolution of a reconstructed image are improved.

Inventors

  • DONG XIAOYU
  • Ni yingsheng
  • HU WENJING
  • LI LINGQIAN

Assignees

  • 奕瑞电真空技术(南京)有限公司

Dates

Publication Date
20260505
Application Date
20250418

Claims (10)

  1. 1. An X-ray tube anode target comprising: The target rod body is provided with a first end face and a second end face which are oppositely arranged, the second end face is provided with an anode target face, a sealed hollow part is arranged in the target rod body, and the surface of the target rod body is provided with a step-shaped supporting face; A wick layer located in the inner wall of the target body having the hollow region, a distance between the wick layer and the first end face being less than a distance between the support face and the first end face, a distance between the wick layer and the second end face being less than a distance between the support face and the second end face; And the working medium is positioned in the liquid absorption core layer, wherein the working medium can flow in the liquid absorption core layer.
  2. 2. The anode target of an X-ray tube according to claim 1, wherein the shortest distance between the liquid absorption core layer and the second end face is 1-15 mm.
  3. 3. The anode stem of an X-ray tube according to claim 1, wherein a dimension of the stem body between the support surface and the first end surface is larger than a dimension of the stem body between the support surface and the second end surface in a direction perpendicular to the first end surface toward the second end surface, and a dimension of the hollow portion between the support surface and the first end surface is larger than a dimension of the hollow portion between the support surface and the second end surface.
  4. 4. The anode stem of an X-ray tube according to claim 1, wherein a dimension of the stem body between the support surface and the first end surface is larger than a dimension of the stem body between the support surface and the second end surface in a direction perpendicular to the first end surface toward the second end surface, and a dimension of the hollow portion between the support surface and the first end surface is equal to a dimension of the hollow portion between the support surface and the second end surface.
  5. 5. The anode target of an X-ray tube according to claim 1, wherein the wall thickness of the target body between the support surface and the first end surface is 0.5-2 mm, and the wall thickness of the target body between the support surface and the second end surface is 0.7-2.5 mm.
  6. 6. The anode target of an X-ray tube of claim 1, wherein the thickness of the liquid absorption core layer is 0.5-2.5 mm.
  7. 7. The anode target of an X-ray tube of claim 1, wherein a maximum distance between the liquid absorbing core layer and the first end face is 4-10 mm.
  8. 8. The anode target rod of the X-ray tube of claim 1, wherein the liquid absorbing core layer is a silk screen layer, a porous silica layer, a porous alumina layer, a copper powder sintered layer or a nickel powder sintered layer, and the working medium is deionized water.
  9. 9. The anode stem of an X-ray tube of claim 1, wherein the exterior surface finish of the stem body is no more than 0.8 μm.
  10. 10. An X-ray tube, characterized in that the X-ray tube comprises an X-ray tube anode target according to any one of claims 1-9.

Description

X-ray tube anode target rod and X-ray tube Technical Field The utility model belongs to the technical field of X-ray tubes, and relates to an anode target rod of an X-ray tube and the X-ray tube. Background The micron and submicron X-ray sources used in the micro CT are core components for realizing high-resolution imaging, and the micro focus X-ray tube has the characteristics of high spatial resolution, high-precision nondestructive detection and the like, and is widely applied in a micro CT system. In general, an anode target rod of a micro-focus X-ray tube is an integral oxygen-free copper rod, the structure of the oxygen-free copper rod is shown in fig. 1, when an electron beam bombards the X-ray focus position of a target surface, local high temperature is generated, heat is conducted into the anode target rod, the anode target rod has displacement with a certain length in the axial direction according to the thermal expansion property of materials due to the temperature rise, the anode target rod axially expands to change the X-ray focus position, and the track of the electron beam is unchanged, so that image points shift, and the quality and spatial resolution of a reconstructed image are reduced. Therefore, how to provide an anode target rod of an X-ray tube and the X-ray tube to improve the quality and spatial resolution of the reconstructed image is a technical problem to be solved by those skilled in the art. Disclosure of utility model In view of the above-mentioned drawbacks of the prior art, an object of the present utility model is to provide an anode target rod of an X-ray tube and an X-ray tube, which are used for solving the problem that in the prior art, the focus of the anode target rod is shifted to cause degradation of quality and spatial resolution of a reconstructed image. To achieve the above and other related objects, the present utility model provides an anode target for an X-ray tube, comprising: The target rod body is provided with a first end face and a second end face which are oppositely arranged, the second end face is provided with an anode target face, a sealed hollow part is arranged in the target rod body, and the surface of the target rod body is provided with a step-shaped supporting face; A wick layer located in the inner wall of the target body having the hollow region, a distance between the wick layer and the first end face being less than a distance between the support face and the first end face, a distance between the wick layer and the second end face being less than a distance between the support face and the second end face; And the working medium is positioned in the liquid absorption core layer, wherein the working medium can flow in the liquid absorption core layer. Optionally, the shortest distance between the liquid absorption core layer and the second end face is 1-15 mm. Optionally, in a direction perpendicular to the first end face directed toward the second end face, a size of the target rod body between the support face and the first end face is larger than a size of the target rod body between the support face and the second end face, and a size of the hollow portion between the support face and the first end face is larger than a size of the hollow portion between the support face and the second end face. Optionally, in a direction perpendicular to the first end face directed toward the second end face, a dimension of the target rod body between the support face and the first end face is larger than a dimension of the target rod body between the support face and the second end face, and a dimension of the hollow portion between the support face and the first end face is equal to a dimension of the hollow portion between the support face and the second end face. Optionally, the wall thickness of the target body between the support surface and the first end surface is 0.5-2 mm, and the wall thickness of the target body between the support surface and the second end surface is 0.7-2.5 mm. Optionally, the thickness of the liquid absorption core layer is 0.5-2.5 mm. Optionally, a maximum distance between the liquid absorption core layer and the first end face is 4-10 mm. Optionally, the liquid absorbing core layer adopts a silk screen layer, a porous silica layer, a porous alumina layer, a copper powder sintered layer or a nickel powder sintered layer, and the working medium adopts deionized water. Optionally, the outer surface finish of the target body is no higher than 0.8 μm. The utility model also provides an X-ray tube comprising the X-ray tube anode target rod. As described above, in the anode target rod of the X-ray tube and the X-ray tube, the anode target rod comprises the target rod body, the liquid absorption core layer and the working medium, so that the axial thermal expansion of the target rod can be reduced, the focus drift phenomenon can be further reduced, the difficulty of correcting focus offset by a system algorithm can be reduced,