超短脉冲强激光与固体靶相互作用产生超热电子的能谱研究

THE STUDY OF HOT ELECTRON SPECTRUM PRODUCED BY ULTRASHORT INTENSE LASER INTERACT WITH SOLID TARGET 

较详尽地描述了能对激光与靶物质相互作用所产生的超热电子进行直接测量的电子磁谱仪的建造及其相应的参量,并利用这台磁谱仪测量了超短脉冲强激光与靶物质相互作用后出射的超热电子的能谱,在5×1015W/cm2的激光强度下,超热电子的最大能量大于500keV,能谱结构呈双温Maxwell分布,能谱的峰值出现在50keV附近。

The building and parameters of electron magnetic spectrometer which can be used to measure the hot electron produced by laser interact with target material directly was described in detail. The energy spectrum of hot electron produced by ultrashort intense laser interact with solid target was measured with this electron spectrometer. In the laser intensity of 5×10 15 ?W/cm\+2, the maximum energy of hot electron is over 500?keV. The spectrum presents two\|temperature Maxwell distribution with peak in 50?keV. The number of hot electrons is much more than the γ\|rays.