A comparison of energy distribution of hot electrons from the front and the rear sides of targets during the interaction of femtosecond laser with foil targets

作者：Cai Da Feng^*; Gu Yu Qiu; Zheng Zhi Jian; Zhou Wei Min

来源：Acta Physica Sinica, 2007, 56(1): 346-352.

• femtosecond laser
• foil target
• hot electron
• energy spectrum

The energy distribution of hot electrons from the front and the rear sides of targets have been measured during the interaction of femtosecond laser with the foil target. The results show that the peaks of energy spectrum of hot electrons from the front and the rear sides of targets are located at 430 keV and 175 keV, respectively. Fitted with Maxwell distribution, the temperatures of hot electrons from the front of targets are 218 keV and 425 keV. Obviously, the energy spectrum of hot electrons from the rear of targets is "softened", which is due to Debye sheath electric field and self-magnetic field produced by hot electrons transported in the target, and has temperatures of 96 keV and 347 keV, which are lower than those from the front of targets.

• 出版日期2007-1
• 单位中国工程物理研究院; 中国工程物理研究院激光聚变研究中心; 内江师范学院