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Single-energy attosecond positron string generation system and generation method thereof

A technology for generating systems and positrons, which is applied in the field of ions, can solve the problems of positron energy dissipation and difficulty in controlling the divergence angle, and achieve the effect of ensuring energy intensity

Pending Publication Date: 2021-01-29
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although positron excitation with high energy density can be provided through the above process, it is still difficult to control the positron energy dispersion and divergence angle.

Method used

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  • Single-energy attosecond positron string generation system and generation method thereof

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Embodiment 1

[0039] The present invention designs a single-energy attosecond positron string generation system, including a Laguerre-Gaussian laser source, a columnar near-critical density target with a radial density gradient, and a Gaussian laser source. The Laguerre-Gaussian laser source The generated Laguerre Gaussian laser enters the near-critical density target through the first optical system, the Gaussian laser source generates ordinary Gaussian laser and enters the near-critical density target through the second optical system, and enters the Laguerre-Gauer Gaussian laser in the near-critical density target Opposite to ordinary Gaussian laser.

[0040] As a preferred setting scheme, the monoenergetic attosecond electron string generation system is mainly composed of three parts, one is the Laguerre-Gaussian laser source for generating Laguerre-Gaussian laser, and the other is for generating ordinary Gaussian laser Gaussian laser source, the third is a columnar near-critical densit...

Embodiment 2

[0047] This embodiment is further optimized on the basis of the foregoing embodiments, and the same parts as the foregoing technical solutions will not be repeated here, such as figure 1 As shown, further, in order to better realize the monoenergetic attosecond positron string generating system, the first optical system includes a Laguerre-Gaussian laser for generating a Laguerre-Gaussian laser source A concave mirror 101 for focusing, and a first reflector 102 for reflecting the Laguerre Gaussian laser focused by the concave mirror 101 into the near-critical density target; to the second reflector 111 in the near-critical density target; the Laguerre-Gauss laser generated by the Laguerre-Gauss laser source is focused by the concave mirror 101 and then reflected by the first reflector 102 and enters it through one end of the near-critical density target ; The ordinary Gaussian laser generated by the Gaussian laser source can pass through the second reflector 111 and enter it t...

Embodiment 3

[0050] This embodiment is further optimized on the basis of any of the above-mentioned embodiments, and the same parts as the aforementioned technical solutions will not be repeated here, such as figure 1 As shown, further, in order to better realize the monoenergetic attosecond positron string generating system, the near-critical density target adopts an optical axis relatively arranged between the first optical system and the second optical system The nozzles A106 and B107 on both sides are generated, and the density distribution of the near-critical density target along the axial direction is low in the middle and high on both sides.

[0051] When setting, the nozzle A106 and the nozzle B107 are arranged oppositely to generate a near-critical density target with a columnar band (preferably a cylindrical band) with a radial density gradient, and make the laser pass through the optical axis formed by the near-critical density target and the nozzle The relative position connec...

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Abstract

The invention discloses a single-energy attosecond positron string generation system and a generation method thereof. The single-energy attosecond positron string generation system comprises a Laguerre Gauss laser source used for generating Laguerre Gauss laser which enters a near critical density target through a first optical system, the near critical density target with a columnar radial density gradient, and a Gauss laser source used for generating common Gauss laser which enters the near critical density target through a second optical system, wherein the Laguerre Gaussian laser and common Gaussian laser in the near critical density target are opposite to each other. The generation method utilizes a single-energy attosecond electron string generation system to generate a single-energyattosecond positron string through interaction of vortex laser (Laguerre Gauss laser and common Gauss laser) and the near-critical density gradient target.

Description

technical field [0001] The invention relates to the field of laser and plasma technology, in particular to a single energy attosecond positron string generating system and a generating method thereof. Background technique [0002] Since the existence of the positron was proved in the 1930s, people have done a lot of research on its production and application, covering many fields. For example: materials science, nuclear physics, laboratory astrophysics, plasma physics, medical imaging and therapy, etc. High-intensity lasers can generate spontaneous electron-positron pairs in vacuum, but the intensity of the laser is extremely high10 29 W / cm 2 , the corresponding electric field strength is as high as 1.32×10 18 V / m, this field strength is also called the Schwinger critical field strength. Spontaneous electron-positron pair avalanches are experimentally elusive. [0003] In order to achieve high energy density positron excitation, most of the current technical routes use ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S4/00
CPCH01S4/00
Inventor 余同普赵杰胡艳婷张昊鲁瑜
Owner NAT UNIV OF DEFENSE TECH