Generation of Hot Electrons at Higher Temperatures from Solid Plasma with a Moderate-Intensity Femtosecond Laser

• 来源期刊: 中国物理快报（英文版）
• 学科: 工学
• 年，卷（期）: 2002,（7）
• 页码范围: 956-958
• 页数: 3页
• 分类号: TN24
• 语种: 英文

摘要

We experimentally investigate the generation of hot electrons from the interaction of a moderate-intensity(1016W/cm2) pre-pulsed-free femtosecond laser (6m J, 120fs, at 744nm) with a solid target. The temperatureof the hot electrons is inferred from the hard x-ray (＞ 30keV) continuum. The measured hard x-ray continuumis fitted by the Maxwellian distribution with two hot-electron temperatures of 45 and 85keV. Electrons withthe lower temperature were accelerated by "vacuum heating". However it is necessary to carry out an accuratenumerical simulation to explain the generation of hot electrons at higher temperatures.