低能量电子脉冲的千兆赫条纹和压缩

Dennis Epp, Benjamin Schröder, Marcel Möller, Claus Ropers
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引用次数: 0

摘要

虽然射频(RF)技术通常用于控制高能电子脉冲,但在低于几千电子伏特的电子束能量方面,还没有开发出相应的技术。在这项研究中,我们展示了利用射频场对低能量电子脉冲进行横向和纵向相空间控制的方法。毫米大小的光电子枪与分别以 0.5 和 2.5 千兆赫频率驱动的同步条纹和压缩腔相结合。在 50-100 eV 的能量范围内,对光电子脉冲的加速和减速进行了相位控制。利用金属栅格上瞬时空间电荷云的偏转来测量 80-eV 电子脉冲的四倍压缩,脉冲持续时间从 τ=34 到 τ=8 ps。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Gigahertz streaking and compression of low-energy electron pulses
Although radio frequency (RF) technology is routinely employed for controlling high-energy pulses of electrons, corresponding technology has not been developed at beam energies below several kiloelectronvolts. In this work, we demonstrate transverse and longitudinal phase-space manipulation of low-energy electron pulses using RF fields. A millimeter-sized photoelectron gun is combined with synchronized streaking and compression cavities driven at frequencies of 0.5 and 2.5 GHz, respectively. The phase-controlled acceleration and deceleration of photoelectron pulses is characterized in the energy range of 50–100 eV. Deflection from a transient space-charge cloud at a metal grid is used to measure a fourfold compression of 80−eV electron pulses, from τ=34 to τ=8 ps pulse duration.
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