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Automated Delivery of Microfabricated Targets for Intense Laser Irradiation Experiments
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Laser ion acceleration using a solid target coupled with a low-density layer.

A Sgattoni1, P Londrillo, A Macchi

  • 1Dipartimento di Energia, Politecnico di Milano, Via Ponzio 34/3, I-20133 Milan, Italy. andrea.sgattoni@polimi.it

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|May 17, 2012
PubMed
Summary
This summary is machine-generated.

Adding a near-critical plasma layer to targets significantly boosts proton acceleration. This novel design enhances electron energy and proton yield via target normal sheath acceleration, tripling maximum proton energy.

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Area of Science:

  • Plasma Physics
  • Laser-Plasma Interactions
  • Particle Acceleration

Background:

  • Laser-driven proton acceleration is crucial for various applications.
  • Optimizing target designs is key to enhancing proton beam properties.
  • Existing methods face limitations in conversion efficiency and proton energy.

Purpose of the Study:

  • To investigate laser-plasma interactions and proton acceleration in multilayer targets.
  • To explore the effect of a near-critical plasma layer on particle acceleration.
  • To enhance proton energy using a novel target configuration.

Main Methods:

  • Two- and three-dimensional particle-in-cell (PIC) simulations.
  • Utilizing multilayer targets with a near-critical plasma layer (foam) on a high-density layer (foil).
  • Analyzing electron and proton dynamics and energy spectra.

Main Results:

  • The near-critical plasma layer significantly increases electron energy and conversion efficiency.
  • Enhanced proton acceleration is observed via the target normal sheath acceleration (TNSA) mechanism.
  • Protons accelerated by the foam target achieved up to three times higher maximum energies compared to bare solid targets.

Conclusions:

  • Multilayer targets with a near-critical plasma layer offer a promising route to high-energy proton beams.
  • The enhanced electric field profile from forward-propagating electrons contributes to improved TNSA.
  • This approach represents a significant advancement in laser-driven particle acceleration.