Photo-anode proton source

A photoanode and proton source technology, applied in the field of plasma, can solve the problems of large divergence angle of laser-accelerated proton beam, bulky proton accelerator, and complex structure, and achieve good collimation, simple structure, and good synchronization performance.

Active Publication Date: 2013-09-18
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the problems of large divergence angle, wide energy spectrum and poor stability of laser-accelerated proton beams in the prior art, as well as the problems of large volume and complex structure of traditional proton accelerators, the present invention provides a photoanode proton source

Method used

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Embodiment 1

[0028] figure 1 is a structural schematic diagram of the photoanode proton source of the present invention, figure 2 It is a structural schematic diagram of the hydrogen-rich magnetic tape target in the present invention. exist figure 1 , figure 2Among them, the photoanode proton source of the present invention includes a TW-class laser 1 and a vacuum target chamber 2, the vacuum target chamber 2 is provided with a window 201, and a plane mirror 3 and an off-axis parabolic reflective focusing mirror are placed in the vacuum target chamber 2 4. Hydrogen-rich magnetic tape target assembly 5, solenoid 6, RF cavity 7 and energy selection system 8; the infrared laser beam emitted by TW-class laser 1 passes through the window 201 of the vacuum target chamber 2 and shoots to the vacuum chamber located in the vacuum target chamber 2 On the plane mirror 3; the laser beam reflected by the plane mirror 3 is shot on the off-axis parabolic reflective focusing mirror 4; the hydrogen-r...

Embodiment 2

[0042] The basic structure of this embodiment is the same as that of Embodiment 1, except that the solenoid is placed at a position 8mm downstream from the strip-shaped hydrogen-rich metal thin film target surface; the two accelerations in the RF chamber 7 The gap width is 2.2cm, and the accelerating voltage is 3.8 MV / m.

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Abstract

The invention discloses a photo-anode proton source which is suitable for high-resolution proton photographing, proton diagnosis and treatment, and generation of high-energy density matters, and is used as an injector of a high-energy proton accelerator. The photo-anode proton source comprises a laser light source and a vacuum target chamber. An ultrashort ultrastrong laser beam irradiates on a planar mirror in the target chamber by penetrating a vacuum target chamber window; the reflected laser beam is focused on a hydrogen-enriched magnetic tape target by an off-axis parabolic reflection focusing mirror, so as to generate an MeV-order continuous spectrum proton beam; energy spectrums and divergence angles of the proton beam can be improved through a back beam current quality adjustment system; collimation of the beam current can be realized by utilizing a solenoid; the energy spectrum of the collimated beam current can be modulated after the collimated beam current passes through an RF (radio frequency) chamber to generate a series of quasi energy peaks; and finally the beam current passes through an energy selection system with a slit-bending iron-slit structure to generate a needed single energy proton beam. The photo-anode proton source is simple in structure, and has good collimation, monochromaticity and stability.

Description

technical field [0001] The invention belongs to the field of laser plasma, and in particular relates to a photoanode proton source. It is used for high-resolution proton photography, proton diagnosis and treatment, production of high-energy-density matter, and as an injector for high-energy proton accelerators. Background technique [0002] Traditional proton linear accelerators have the characteristics of bulky size and complex structure, including injectors, low-energy beam delivery systems, and a complete set of acceleration structures from low-energy to high-energy. The injector of a traditional proton linear accelerator usually uses a pressure doubler accelerator, which consists of a high-voltage generator, an accelerating tube, and a particle source, and can generate low-energy proton beams of tens of keV. The generated low-energy beam needs to go through a complex low-energy beam transport system for shaping, focusing, and focusing, so that it meets the phase space ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21G4/04G21G4/06
Inventor 滕建谷渝秋赵宗清税敏
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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