斜入射脉冲X射线产生电流实验

 针对斜入射脉冲X射线与金属的几种可能相互作用机制，设计了实验布局，测量了斜入射X射线在金属靶上产生的脉冲电流，建立了相应的理论模型。结果显示，当X射线入射强度低于10⁵ W/cm²时，以光电效应为主,高于此值时，以热电效应为主导。这表明，X射线加载强度较弱时，电子表现出个体行为,而增大X射线入射强度，电子表现出弱关联集体行为。由此可以预测，超强X射线辐照下，金属表面将出现宏观尺度的电荷密度调制，在退激发过程中，这种调制状态可能以较高的效率辐射定向的微波电磁脉冲。

Experimental investigation on currents produced by obliquely incident X rays

Experimental setup was designed to distinguish photoelectric effect, thermoelectric effect and Compton effect in X rays and metal interaction. Measurements of currents in metals irradiated by obliquely incident X rays produced by X pinch show that photoelectric effect will dominate the interaction process when the X ray intensity is lower than 105 W/cm2, and thermoelectric effect will dominate when the intensity is higher. Electrons irradiated by weak X rays show individual behavior, while they show weak correlated collective behavior with increasing intensity. Thus it is reasonable to predict that macroscopic charge density modulation will appear on metal surface irradiated by ultra-intense X rays, and directed electromagnetic pulses will be produced during the de-excitation of such state