Differential pumping for kHz operation of a laser wakefield accelerator based on a continuously flowing hydrogen gas jet.

IF 1.3 4区 工程技术 Q3 INSTRUMENTS & INSTRUMENTATION
J Monzac, S Smartsev, J Huijts, L Rovige, I A Andriyash, A Vernier, V Tomkus, V Girdauskas, G Raciukaitis, M Mackevičiūtė, V Stankevic, A Cavagna, J Kaur, A Kalouguine, R Lopez-Martens, J Faure
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引用次数: 0

Abstract

Laser-Wakefield Accelerators (LWFAs) running at kHz repetition rates hold great potential for applications. They typically operate with low-energy, highly compressed laser pulses focused on high-pressure gas targets. Experiments have shown that the best-quality electron beams are achieved using hydrogen gas targets. However, continuous operation with hydrogen requires a dedicated pumping system. In this work, we present a method for designing a differential pumping system, which we successfully implemented in our experiments. This enabled the first demonstration of continuous operation of a kHz LWFA using a high-pressure hydrogen gas jet. The system effectively maintained a pressure below 3 × 10-4 mbar, even with a free-flowing gas jet operating at 140 bar backing pressure. Numerical fluid dynamics and optical simulations were used to guide and validate the system's design.

基于连续流动氢气射流的激光尾流场加速器千赫差动抽运。
以kHz重复频率运行的激光-韦克菲尔德加速器(LWFAs)具有巨大的应用潜力。它们通常使用低能量、高度压缩的激光脉冲聚焦在高压气体目标上。实验表明,使用氢气靶可以获得质量最好的电子束。然而,持续使用氢气需要一个专用的泵送系统。在这项工作中,我们提出了一种设计差动泵系统的方法,并在实验中成功实现。这使得使用高压氢气射流连续操作kHz LWFA的首次演示成为可能。该系统有效地将压力保持在3 × 10-4 mbar以下,即使在140 bar的背压下使用自由流动的气体射流。采用数值流体力学和光学模拟来指导和验证系统的设计。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Review of Scientific Instruments
Review of Scientific Instruments 工程技术-物理:应用
CiteScore
3.00
自引率
12.50%
发文量
758
审稿时长
2.6 months
期刊介绍: Review of Scientific Instruments, is committed to the publication of advances in scientific instruments, apparatuses, and techniques. RSI seeks to meet the needs of engineers and scientists in physics, chemistry, and the life sciences.
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