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High-intensity laser-accelerated ion beam produced from cryogenic micro-jet target.

M Gauthier1, J B Kim1, C B Curry1

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Summary

A new cryogenic jet target successfully produced pure proton beams up to 2 MeV using high-intensity lasers. This advancement offers a promising method for generating high-purity ion beams for future applications.

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Area of Science:

  • Plasma Physics
  • Laser-Plasma Interactions
  • Ion Beam Generation

Background:

  • High-intensity lasers enable novel particle acceleration methods.
  • Developing pure, well-characterized ion beams is crucial for various applications.
  • Cryogenic jet targets offer advantages in target stability and purity.

Purpose of the Study:

  • To demonstrate the successful operation of a novel cryogenic jet target.
  • To investigate proton and ion beam generation using high-intensity laser irradiation.
  • To assess the potential of this target system for future applications.

Main Methods:

  • Utilized a frequency-doubled Titan short pulse laser system.
  • Employed a newly developed cryogenic jet target.
  • Irradiated a solid-density mixed hydrogen-deuterium target.

Main Results:

  • Achieved generation of a pure proton beam with a maximum energy of 2 MeV.
  • Observed a quasi-monoenergetic proton peak at 1.1 MeV in the forward direction.
  • Produced pure proton-deuteron ion beams from a mixed hydrogen-deuterium target.

Conclusions:

  • The cryogenic jet target operates successfully at high laser intensities.
  • The target system demonstrates potential for generating high-purity proton and mixed ion beams.
  • The observed proton spectrum suggests novel acceleration mechanisms warranting further investigation.