Generation of fast protons in moderate-intensity laser-plasma interaction from rear sheath  

作　　者：谭志新 黄永盛 兰小飞 路建新 段晓礁 王雷剑 杨大为 郭士伦 王乃彦 

机构地区：[1]High Power Excimer Laser Laboratory,China Institute of Atomic Energy

出　　处：《Chinese Physics B》2010年第5期399-405,共7页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant No. 10834008);the State Key Development Program for Basic Research of China (Grant No. 2006CB806004)

摘　　要：Forward fast protons are generated by the moderate-intensity laser-foil interaction. Protons with maximum energy 190 keV are measured by using magnetic spectrometer and CR-39 solid state track detectors along the direction normal to the rear surface. The experimental results are also modeled by the paxticle-in-cell method, investigating the timevarying electron temperature and the rear sheath field. The temporal and spatial structure of the sheath electrical field, revealed in the simulation, suggests that these protons are accelerated by target normal sheath acceleration （TNSA） mechanism.Forward fast protons are generated by the moderate-intensity laser-foil interaction. Protons with maximum energy 190 keV are measured by using magnetic spectrometer and CR-39 solid state track detectors along the direction normal to the rear surface. The experimental results are also modeled by the paxticle-in-cell method, investigating the timevarying electron temperature and the rear sheath field. The temporal and spatial structure of the sheath electrical field, revealed in the simulation, suggests that these protons are accelerated by target normal sheath acceleration （TNSA） mechanism.

关 键 词：laser proton acceleration target normal sheath acceleration 

分 类 号：O53[理学—等离子体物理] TU755.32[理学—物理]