Laser target used for producing ion acceleration

Abstract

The invention relates to a laser target used for producing ion acceleration. The laser target used for producing the ion acceleration comprises a target body and a target-rear ion source region, wherein the target body is provided with a target front surface and a target rear surface, the target-rear ion source region comprises a middle region and an edge inclined plane region, the rear surface of the middle region is perpendicular to the central axis of the target body, and an inclined included angle is formed between the rear surface of the edge inclined plane region and the central axis of the target body. The laser target used for producing the ion acceleration is based on the acceleration principle that intense lasers and a solid target act on the back of the target to form a sheath layer electrostatic field to accelerate ions or protons in a sheath layer field, the structure of the target front surface and the structure of the target rear surface are optimized, accelerating performance of the laser target is further improved, a peta-watt level intense laser pulse and the action of the peta-watt level intense laser pulse are used, and therefore a high quality ion beam or proton beam applicable to medical treatment application is obtained.

Description

technical field [0001] The invention relates to the technical field of accelerators, in particular to a laser target for generating high-quality ion beams through strong laser action. Background technique [0002] Radiation therapy is a common form of cancer treatment that uses various particle beams and radiation sources, such as high-energy ion beams, high-energy electron beams, x-rays, or gamma rays, to kill cancer cells by irradiating them on cancerous tissue , to achieve the purpose of treatment. The key issue in this treatment method is how to deliver the appropriate radiation dose to the cancerous tissue while ensuring that the healthy tissue around the cancerous tissue is not damaged. [0003] Studies have found that compared with high-energy electron beams, x-rays or gamma rays, the use of high-energy ion beams for radiation therapy (commonly known as hadron beam therapy - Hadron therapy) has many advantages. First, the ion beam will not be strongly scattered by t...

AI Technical Summary

Problems solved by technology

In this way, because the laser only interacts with a simple planar target, the post-target proton acceleration is mainly accelerated by the sheath electric field established by high-energy electrons, and its efficiency is relatively low. So far, people have not obtained more than 100 MeV in the laboratory. proton beam

[0009] In other schemes, it also has the following disadvantages. The ion beam generated by Coulomb explosion acceleration has poor directionality, and the non-collision electrostatic shock wave acceleration can only produce ions of tens of MeV.

In principle, the scheme of laser radiation pressure acceleration can produce proton beams of hundreds of MeV or even above 1 GeV, but this mechanism requires the use of thin-film targets with a thickness of tens of nanometers or at the level of skin depth, which has great impact on the target manufacturing process and laser The contrast puts forward very high requirements, so it is very technically difficult to realize experimentally

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