强激光与粒子束2012，Vol.24Issue(8)：1879-1881,3.DOI:10.3788/HPLPB20122408.1879
超短激光与金薄膜靶相互作用产生的质子能谱
Energy spectra of protons driven by ultra-short laser interaction with thin gold foils
摘要
Abstract
Proton acceleration experiments were performed by using an ultra-short laser to irradiate gold foils of 5 μm and 2. 1 μm in thickness. The ultra-short laser pulse had the pulse duration of 120 fs and energy of 11 mj. The peak focal intensity remained around 6X 1016W/cm2. A Thomson ion spectrometer with CR39 plastic nuclear track detectors were used to observe spectra of the accelerated protons. The spectrum of the 2. 1 μm foil featured a single peak around 74 keV due to the inefficiency of protons. The maximum energies and efficiencies of accelerated protons increased with decreasing the target thickness. The results were explained by the energy loss of electron transmission and a geometrical effect on hot electron recirculation.关键词
超短激光/薄膜靶/质子加速/能谱Key words
ultra-short laser/ thin foil/ proton acceleration/ energy spectrum分类
数理科学引用本文复制引用
路建新,兰小飞,黄永盛,王雷剑,席晓峰,汤秀章,杨大为..超短激光与金薄膜靶相互作用产生的质子能谱[J].强激光与粒子束,2012,24(8):1879-1881,3.基金项目
国家自然科学基金项目(10834008,11l05234) （10834008,11l05234）
国家973项目(2011CB808104) （2011CB808104）
