【摘要】 报道了100TW超短脉冲钛宝石激光装置上相对论强度激光-固体靶相互作用中超热电子的能谱测量,获得了靶前法线和靶后激光传输方向超热电子能谱。在靶前法线方向,能谱呈单温类麦克斯韦分布,占主导地位的加速机制是共振吸收;靶后激光传输方向,在较低能段能谱呈类麦克斯韦分布,存在的加热机制是有质动力V×B加热,在较高能段能谱出现了高能尾部。对其形成原因进行了分析。更多还原

【Abstract】 Hot electron spectrum in the interaction of relativistic laser with solid target was measured in this experiment,and hot energy spectrum in front normal direction and rear laser propagation direction were obtained.In front normal direction,the spectrum is a Maxwellian-like distribution,which is produced by resonant absorption mechanism;Along the laser propagation,the spectrum is a Maxwellian-like distribution in the lower energy segment,which is produced by the laser ponderomotive force V×B;in higher energy segment,there exsits high energy tail,which is induced by self-focusing effect.更多还原