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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。
The energy spectrum measurement of superheated electrons in the relativistic intensity laser-solid target interaction on 100TW ultrashort-pulse Ti: sapphire laser devices was reported. The super-thermal electron energy spectra of the pre-target and post-target laser beams were obtained. In the normal direction of the target before the target, the energy spectrum is monomorphic Maxwellian distribution, the dominant acceleration mechanism is the resonance absorption; after the target laser transmission direction, the energy spectrum in the lower energy range appears like Maxwellian distribution, the existence of the heating mechanism is The mass-energy V × B heats up the high-energy tail in the higher-energy spectrum. The reasons for its formation were analyzed.