Open AccessLaser driven shock accelerated ion energy spectrumbroadening mechanisms in over-dense plasmas
Author(s) -
Weijun Ling,
Quan Dong,
Lei Zhang,
Shaogang Zhang,
Dong Zhao,
Wei Kai-Bin,
Shoujun Wang,
Maowei He,
Zheng-Ming Sheng,
Jie Zhang
Publication year - 2011
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.60.075201
Subject(s) - ion , plasma , atomic physics , shock (circulatory) , dissipation , shock wave , laser , acceleration , physics , irradiation , energy spectrum , shock waves in astrophysics , pulse (music) , optics , nuclear physics , mechanics , medicine , quantum mechanics , thermodynamics , classical mechanics , detector
The broadening mechanisms are investigated for the energy spectrum of ions accelerated by electrostatic shocks in overdense plasmas irradiated by intense ultra-short laser pulses. It is found that the width of the shock-accelerated ion spectrum could be ineluctably broadened by three mechanisms, which are the continuously decreasing speed of the shock front due to the energy dissipation into ions, the collisions between the particles, and the further acceleration by the sheath field at the rear of target where when energetic ions arrive. Other effects, such as effect of driving laser pulse duration, are also studied.