论文标题
产生Terawatt，从相对论过渡辐射中产生的脉冲
Generation of terawatt, attosecond pulses from relativistic transition radiation
论文作者
论文摘要
当FS持续时间和数百个KA峰电流电子光束遍历真空和高密度等离子体接口一个新过程时，我们称之为相对论过渡辐射（R-TR）会产生一个强烈的$ \ sim100 $作为脉冲，其中包含$ \ sim $ \ sim $ \ sim $ tw cooherent coohrent vuv satellite satellite satellite satellite satellite satellite satellite satellite satellite satellite satellite satellite satellite satellite satellite satellite satellite。该脉冲继承了入射光束场的径向极化，并具有环强度分布。当梁密度与等离子体密度相当并且斑点尺寸比等离子皮肤深度大得多时，将发出此R-TR。从物理上讲，它是由电子的回流电流或向后的相对论运动开始的，该运动始于多普勒将发射光子移动的等离子体内部。 R-TR脉冲的数量取决于在第一个等离子体唤醒周期内源自不同深度的等离子体电子组的数量，并在相混合前一致发射。
When a fs duration and hundreds of kA peak current electron beam traverses the vacuum and high-density plasma interface a new process, that we call relativistic transition radiation (R-TR) generates an intense $\sim100$ as pulse containing $\sim$ TW power of coherent VUV radiation accompanied by several smaller fs duration satellite pulses. This pulse inherits the radial polarization of the incident beam field and has a ring intensity distribution. This R-TR is emitted when the beam density is comparable to the plasma density and the spot size much larger than the plasma skin depth. Physically, it arises from the return current or backward relativistic motion of electrons starting just inside the plasma that Doppler up-shifts the emitted photons. The number of R-TR pulses is determined by the number of groups of plasma electrons that originate at different depths within the first plasma wake period and emit coherently before phase mixing.
