从ZrC针和场发射器阵列发射的纳秒场发射电流脉冲
Nanoseconds field emitted current pulses from ZrC needles and field emitter arrays
摘要：
电子源的特性决定了诸如自由电子激光（FEL）等直线加速器中光束质量的极限。目标是研制一种束流发射度低于现有技术水平的电子枪，以降低X射线自由电子激光（XFEL）的成本和尺寸。本文提出了两种可能产生低发射度电子束的场发射阴极概念。这种阴极的第一个挑战性参数是发射高达5A的峰值电流。这是Paul Scherrer研究所对XFEL概念的最小电流要求。1场发射阵列（FEA）和单针阴极分别达到了0.12 A和0.58 A的最大电流。激光辅助场致发射给出了令人鼓舞的结果，以达到甚至更高的峰值电流和预聚束的光束。
英文摘要：
The properties of the electron source define the ultimate limit of the beam quality in linear accelerators like Free Electron Lasers (FEL). The goal is to develop an electron gun delivering beam emittance lower than current state of the art. Such a gun should reduce the cost and size of an X-ray Free Electron Laser (XFEL). In this paper we present two concepts of field emitter cathodes which could potentially produce low emittance beam. The first challenging parameter for such cathode is to emit peak current as high as 5 A. This is the minimum current requirement for the XFEL concept from Paul Scherrer Institut.1 Maximum current of 0.12 A and 0.58 A have been reached respectively with field emitter arrays (FEA) and single needle cathodes. Laser assisted field emission gave encouraging results to reach even higher peak current and to pre-bunch the beam.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
