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Towards compact laser-driven accelerators: exploring the potential of advanced double-layer targets.

Alessandro Maffini1, Francesco Mirani1, Marta Galbiati1

  • 1Dipartimento di Energia, Politecnico di Milano, Piazza L. Da Vinci, 32, Milano, 20133 Italy.

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Summary

Compact laser-driven accelerators using double-layer targets (DLTs) show promise for environmental monitoring. These advanced DLTs enable MeV proton acceleration for Particle Induced X-ray Emission (PIXE) analysis, matching conventional source performance.

Keywords:
Carbon foamsDouble-layer targetsLaser-driven particle accelerationMagnetron sputteringParticle induced X-ray emissionPulsed-laser deposition

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Area of Science:

  • Physics
  • Materials Science
  • Environmental Science

Background:

  • Growing demand for compact, cost-effective accelerators in diverse fields like medicine, agriculture, and environmental analysis.
  • Particle Induced X-ray Emission (PIXE) requires MeV-energy ions for non-destructive material characterization, particularly in environmental monitoring.
  • Superintense laser-driven ion sources offer a promising alternative to traditional accelerators, with target optimization crucial for enhanced ion properties.

Purpose of the Study:

  • To explore advanced double-layer targets (DLTs) for laser-driven particle acceleration.
  • To assess the potential of DLTs for producing MeV-energy ions using compact laser systems.
  • To evaluate the application of DLT-based laser-driven ion sources for PIXE analysis of aerosol samples.

Main Methods:

  • Production of advanced DLTs using deposition techniques.
  • Particle-in-cell simulations to assess laser-driven ion acceleration potential with DLTs.
  • Monte Carlo simulations to evaluate PIXE analysis of aerosol samples using DLT-generated ions.

Main Results:

  • Optimized DLTs, when coupled with a ~20 TW compact laser, successfully accelerate MeV protons.
  • Simulations indicate that DLT-based laser-driven ion acceleration can achieve PIXE performance comparable to conventional sources.
  • Advanced DLTs enhance laser-target coupling, improving ion current and energy while reducing laser system requirements.

Conclusions:

  • Compact DLT-based laser-driven accelerators are a viable technology for environmental monitoring applications.
  • DLTs represent a significant advancement in target design for laser-driven particle acceleration.
  • This technology offers a cost-effective and versatile solution for material characterization using PIXE.