Focusing device of laser acceleration pulse proton beam

Abstract

The invention discloses a focusing device of a laser acceleration pulse proton beam, which relates to the technical field of laser acceleration wide energy spectrum pulse proton beam transmission. The device comprises a capillary tube, a first discharge electrode, a second discharge electrode, a discharge circuit, a first mounting piece and a second mounting piece; the negative electrode of the discharge circuit is connected with the first discharge electrode; the positive electrode of the discharge circuit is connected with the second discharge electrode; the discharge circuit is used for providing voltage drop for the first discharge electrode and the second discharge electrode; the first discharge electrode and the second discharge electrode utilize the voltage drop to break down gas in a fourth channel, so that the gas is subjected to arc discharge to form plasma; and the plasma forms a pulse proton beam for accelerating the laser passing through the fourth channel to realize focusing while bearing strong discharge current. According to the focusing device of the laser acceleration pulse proton beam, short-range focusing of a laser acceleration wide-energy-spectrum beam can be achieved.

Description

technical field [0001] The invention relates to the technical field of laser-accelerated wide-energy-spectrum pulsed proton beam transmission, in particular to a focusing device for laser-accelerated pulsed proton beams. Background technique [0002] Charged particle accelerators are important tools in fields of research such as high-energy physics and nuclear physics, as well as in applications such as materials, biology and medicine. Huge volume and expensive construction and maintenance costs have become the main bottlenecks in the development of accelerators in many application fields, and technological innovation is urgently needed. [0003] Laser accelerators use super-intensive lasers to interact with plasma, and can accelerate electrons or ions to relativistic energies on the scale of centimeters or even microns. So far, laser acceleration has successfully obtained quasi-monoenergetic electron beams with an energy of 4.2GeV, proton beams with the highest energy of 9...

AI Technical Summary

Problems solved by technology

[0005] In summary, the defects of the traditional focusing device for focusing the laser accelerated beam are very obvious: the focal spot size of the laser accelerated beam is extremely small, and the space charge force is large, and the traditional focusing device cannot neutralize the space charge; the laser accelerated beam has a wide energy Spectrum, the traditional focusing device does not have good dispersion ability; the traditional focusing device provides limited focusing force due to the limitation of current carrying capacity, large size and long transmission distance

Images