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Design and optimization of a compact laser-driven proton beamline.

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Laser-driven proton sources offer high beam charge and short bunch durations. This study optimizes a laser-driven beamline to reduce proton energy spread for applications, achieving below 20% spread.

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Area of Science:

  • Physics
  • Particle Acceleration
  • Laser-Plasma Interactions

Background:

  • Laser-accelerated protons offer advantages over conventional accelerators, including high beam charge and short bunch duration.
  • A key limitation of laser-driven proton sources is their broadband energy spectrum, hindering applications requiring narrow energy spread.
  • Recent research focuses on developing laser-driven proton beamlines with reduced energy spread.

Purpose of the Study:

  • To optimize a laser-driven beamline design for producing protons with reduced energy spread.
  • To investigate beam dynamics for enhanced proton beam quality from laser-based sources.
  • To assess the usability of optimized laser-driven proton beams for specific applications.

Main Methods:

  • Utilized beam dynamics simulations to design and optimize a laser-driven proton beamline.
  • Coupled a laser-based proton source with conventional magnetic beam manipulation devices.
  • Investigated proton energies in the range of 2 to 20 MeV, typical for commercial TW-class laser systems.

Main Results:

  • Achieved a reduction in proton energy spread to below 20%.
  • Maintained an overall transmission efficiency of approximately 1%.
  • Produced a proton spot-size within the range of 10 mm².

Conclusions:

  • The optimized laser-driven beamline design effectively reduces proton energy spread.
  • The developed beamline shows potential for applications requiring controlled proton energy, such as in Cultural Heritage.
  • Laser-driven proton sources, when optimized, can become viable alternatives to conventional accelerators for specific applications.