Enhancement of ion generation in femtosecond ultraintense laser-foil interactions by defocusing

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

A simple method to enhance ion generation with femtosecond ultraintense lasers is demonstrated experimentally by defocusing laser beams on target surface. When the laser is optimally defocused, we find that the population of medium and low energy protons from ultra-thin foils is increased significantly while the proton cutoff energy is almost unchanged. In this way, the total proton yield can be enhanced by more than 1 order, even though the peak laser intensity drops. The depression of the amplified spontaneous emission (ASE) effect and the population increase of moderate-energy electrons are believed to be the main reasons for the effective enhancement. (C) 2012 American Institute of Physics. [doi:10.1063/1.3688027]

Detaljer

Författare
  • M. H. Xu
  • Y. T. Li
  • D. C. Carroll
  • P. S. Foster
  • S. Hawkes
  • S. Kar
  • F. Liu
  • K. Markey
  • P. McKenna
  • M. J. V. Streeter
  • C. Spindloe
  • Z. M. Sheng
  • Claes-Göran Wahlström
  • M. Zepf
  • J. Zheng
  • J. Zhang
  • D. Neely
Enheter & grupper
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Atom- och molekylfysik och optik
Originalspråkengelska
Artikelnummer084101
TidskriftApplied Physics Letters
Volym100
Utgåva nummer8
StatusPublished - 2012
PublikationskategoriForskning
Peer review utfördJa

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