Energetic Laser-Ion Acceleration by Strong Charge-Separation Field
(0) The laser-ion acceleration from the ultra-short and ultra-intense laser-matter interactions attracts more and more interest nowadays. When a laser pulse interacts with a target, relativistic electrons are generated in a period of few femtoseconds and driven away by the pon-deromotive force, then a huge chargeseparation field forms. In general cases, the ion acceleration is determined by this charge-separation field and the scale length of the plasma density. a general time-dependent solution is obtained to describe laser-plasma isothermal expansions into a vacuum, which is the fundamental theory of the laserion acceleration. It is adequate for non-quasineutral plasmas and different types of the scale length of the density gradient. The previous solutions are some special cases of our general solution. It is found that there exist both a compression layer of the ion velocity distribution and a potential well for some initial conditions. However, many unaccounted idiographic solutions, which may be used to reveal new mechanisms of ion acceleration, may be deduced from our general solutions.
laser-ion acceleration ultra-short and ultra intense charge separation field compression layer potential well
HUANG Yongsheng WANG Naiyan SHI Yijin TANG Xiuzhang BI Yuanjie GAO Zhe
China Institute of Atomic Energy, Beijing 102413, China Department of Engineering Physics, Tsinghua University, Beijing 100084, China
国际会议
西安
英文
268-276
2009-10-26（万方平台首次上网日期，不代表论文的发表时间）