在近相对论光强下,对p偏振超强激光脉冲与固体靶相互作用过程中产生的超热电子的角分布和能谱进行了研究.实验发现,超热电子的发射主要集中在三个方向:靠近靶面方向、法线方向和激光的背向.结果分析表明:导致超热电子沿着靶面发射的原因是它受到靶前的鞘层电场与表面磁场的共同作用;而沿着法线方向发射的超热电子的主要加速机制是共振吸收机制. Under near relativistic light intensity, the angular distribution and energy spectrum of the superheated electrons generated during the interaction between the p-polarized superlattice laser pulses and the solid target were studied. It was found that the emission of superheated electrons mainly concentrated in three directions : Close to the target direction, the normal direction and the laser back.Results show that: the cause of the hot electron emission along the target surface because it is subject to the target before the sheath electric field and surface magnetic field together; along the law The main acceleration mechanism of hot electrons emitted in the line direction is the resonance absorption mechanism.