采用180电子磁谱仪方法测量了超短(120 fs)红外(744 nm)脉冲激光与固体等离子体相互作用产生的超热电子能谱。激光参数为无预脉冲、45斜入射的P激化光,靶为5 mm的铜,靶表面经机械抛光,靶上功率密度为1016 W/cm2。谱仪设置在入射激光的正反射方向,测量到的能谱采用 Maxwellian(e The superheat electron energy spectrum generated by the interaction of ultra-short (120 fs) infrared (744 nm) pulsed laser with solid plasma was measured by 180 electron spectrometer. The laser parameters were without pre-pulse, 45 oblique incident P-lasing light with 5 mm target copper, and the target surface was mechanically polished with a target power density of 1016 W / cm2. The spectrometer is set in the regular reflection direction of the incident laser and the measured spectrum is Maxwellian (e