Enhancement of proton energy by polarization switch in laser acceleration of multi-ion foils

Tung Chang Liu, Xi Shao, Chuan Sheng Liu, Bengt Eliasson, Jyhpyng Wang, Shih Hung Chen

研究成果: 雜誌貢獻期刊論文同行評審

3 引文 斯高帕斯(Scopus)

摘要

We present a scheme to significantly increase the energy of quasi-monoenergetic protons accelerated by a laser beam without increasing the input power. This improvement is accomplished by first irradiating the foil several wave periods with circular polarization and then switching the laser to linear polarization. The polarization switch increases the electron temperature and thereby moves more electrons ahead of the proton layer, resulting in a space charge electric field pushing the protons forwards. The scaling of the proton energy evolution with respect to the switching time is studied, and an optimal switching time is obtained. The proton energy for the case with optimal switching time can reach about 80 MeV with an input laser power of 70 TW, an improvement of more than 30% compared to the case without polarization switch.

原文???core.languages.en_GB???
文章編號103112
期刊Physics of Plasmas
20
發行號10
DOIs
出版狀態已出版 - 10月 2013

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