论文标题
纳秒$ x $ band radiofquerquerquency Pulses驱动的光发射电子枪中的子GV/m加速电场的演示
Demonstration of sub-GV/m Accelerating Field in a Photoemission Electron Gun Powered by Nanosecond $X$-Band Radiofrequency Pulses
论文作者
论文摘要
在高加速梯度下运行的射频（RF）电子枪为产生明亮的电子束提供了途径。这种梁有望彻底改变科学的许多领域：它们可能形成下一代紧凑型X射线自由电子激光器的骨干，或提供相干的超快量子电子探针。我们报告了RF光发射电子源的实验证明，该电源在光电表面上支持接近400 〜mV/m的加速场。该枪是在由短$ \ sim 9 $ 〜ns x频段（\ si {11.7} {\ giga \ hertz}）rf脉冲驱动的RF瞬态模式下操作的。在高加速场上进行了为期三周的实验跑步，我们没有观察到任何重大的RF崩溃或明显的黑电流。所展示的范式为形成具有前所未有的亮度的相对论电子束提供了可行的途径。
Radiofrequency (RF) electron guns operating at high accelerating gradients offer a pathway to producing bright electron bunches. Such beams are expected to revolutionize many areas of science: they could form the backbone of next-generation compact x-ray free-electron lasers or provide coherent ultrafast quantum electron probes. We report on the experimental demonstration of an RF photoemission electron source supporting an accelerating field close to 400~MV/m at the photocathode surface. The gun was operated in an RF transient mode driven by short $\sim 9$~ns X-band (\SI{11.7}{\giga\hertz}) RF pulses. We did not observe any major RF breakdown or significant dark current over a three-week experimental run at high accelerating fields. The demonstrated paradigm provides a viable path to forming relativistic electron beams with unprecedented brightness.
