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Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
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Published on: July 27, 2018

MeV negative ion source from ultra-intense laser-matter interaction.

S Ter-Avetisyan1, B Ramakrishna, D Doria

  • 1School of Mathematics and Physics, The Queen's University of Belfast, Belfast BT71NN, United Kingdom. s.teravetisyan@qub.ac.uk

The Review of Scientific Instruments
|March 3, 2012
PubMed
Summary

This study demonstrates a novel method for accelerating negative ions to MeV energies using laser-irradiated water droplets. This breakthrough results in the brightest negative ion source reported to date.

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Area of Science:

  • Laser-driven particle acceleration
  • Plasma physics
  • Ion source development

Background:

  • Negative ion acceleration is crucial for various applications, including materials science and medical therapies.
  • Existing methods for generating high-energy negative ions often face limitations in intensity and stability.
  • Water spray targets offer a unique medium for laser-matter interactions.

Purpose of the Study:

  • To experimentally demonstrate the acceleration of negative ions to MeV energies from water droplet targets.
  • To characterize the intensity, energy, and stability of the generated negative ion beams.
  • To establish a new benchmark for high-brightness negative ion sources.

Main Methods:

  • Irradiation of sub-micron water droplets with ultra-intense laser pulses.
  • Utilizing a specific target configuration and optimized laser parameters.
  • Analysis of accelerated negative ion beams using particle diagnostics.

Main Results:

  • Successful acceleration of negative ions to MeV energies was achieved.
  • Intensities exceeding 10^9 negative ions per steradian in a 5% energy bandwidth were recorded.
  • Stable and reliable emission of negative ions was observed.
  • Evidence of co-accelerated neutral beams with comparable energies and numbers was found.

Conclusions:

  • Laser-irradiated water droplets represent a highly efficient and bright source of MeV negative ions.
  • The demonstrated technique offers a promising pathway for advanced ion source development.
  • The findings pave the way for new applications in fields requiring high-intensity negative ion beams.