Isolation window structure and device for leading out low-energy charged particles

A technology of charged particles and isolation windows, which is applied in X-ray/γ-ray/particle irradiation therapy, electrical components, medical equipment, etc. It can solve the problems of inability to meet the irradiation requirements of living organisms, large energy loss, and increased dose. Achieve the effects of reduced deformation and stress, small output energy loss, and reduced activation

Pending Publication Date: 2021-05-25
CHINA INSTITUTE OF ATOMIC ENERGY
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Problems solved by technology

However, when the particle beam passes through metal materials, the energy loss is relatively large, and the secondary particles produced, such as neutrons and gamma rays, may cause additional dose exposure to patients or biological samples, and due to the metal material Activation, delayed gamma rays will also cause the problem of increased background dose in the treatment environment or experimental environment, which cannot meet the irradiation needs of organisms

Method used

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  • Isolation window structure and device for leading out low-energy charged particles
  • Isolation window structure and device for leading out low-energy charged particles
  • Isolation window structure and device for leading out low-energy charged particles

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Embodiment Construction

[0060] Considering that low-energy particle irradiation can meet the dose requirements, the use of low-energy particle accelerators for biological irradiation can be used as a research direction. However, for the beam emission of low-energy particles, there are the following technical difficulties: on the one hand, due to the Compared with high-energy particles, the energy of low-energy particles is very low. Based on the existing window sealing structure, it is impossible to realize the emission of some light particles with small atomic mass, or some particles will lose a lot of energy during the emission process, resulting in an extremely long range. Short, making it impossible to carry out biological radiation experiments or cancer treatment.

[0061] In view of this, the present disclosure provides an isolation window structure and device for extracting low-energy charged particles, based on the setting of the sealing film, the grid-like lining structure and the gap between...

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Abstract

The invention relates to an isolation window structure and device for leading out low-energy charged particles. The isolation window structure comprises a sealing piece, a sealing film and a latticed lining structure, wherein the sealing piece is used for being connected with a vacuum chamber. The sealing piece is provided with an opening, the outer side of the sealing piece is an atmospheric environment, and the inner side of the sealing piece is used for forming a vacuum environment. The sealing film is fixed on the sealing piece and shields the opening. The latticed lining structure is fixed on the sealing piece and is positioned on the inner side of the sealing film. A gap is formed between the lining structure and the sealing film, and the projection of the lining structure covers the opening. The latticed lining structure is used as a supporting structure of the sealing film, so that the vacuum degree of the vacuum chamber can be kept; and meanwhile, energy loss of low-energy particles passing through the isolation window structure can be reduced, and it is guaranteed that the energy and dosage of the emitted particles can meet the biological irradiation requirement.

Description

technical field [0001] The disclosure belongs to the technical field of particle acceleration and radiation, and relates to an isolation window structure and device for extracting low-energy charged particles. Background technique [0002] For accelerator-based particle beam cancer treatment and radiation biological effects research, the treatment and research objects involved are all living organisms, which must be in an atmospheric environment to maintain normal survival. Therefore, it is necessary to use an isolation window to separate the particle beam Introduced into the atmosphere by vacuum. [0003] Medium and high-energy particles have high energy and long range, and metal materials with a certain thickness and high strength, such as titanium and aluminum, are usually used as window sealing materials. However, when the particle beam passes through metal materials, the energy loss is relatively large, and the secondary particles produced, such as neutrons and gamma r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05H7/00H05H7/14A61N5/10
CPCA61N5/10A61N2005/1095H05H7/00H05H7/14H05H2277/11
Inventor 隋丽郭刚孔福全刘建成龚毅豪
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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