Article Dans Une Revue Review of Scientific Instruments Année : 2025

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

J. Monzac
S. Smartsev
J. Huijts
L. Rovige
I A Andriyash
A. Vernier
V. Tomkus
V. Girdauskas
G. Raciukaitis
M. Mackevičiūtė
V. Stankevic
  • Fonction : Auteur
A. Cavagna
A. Kalouguine
Jérôme Faure

Résumé

Laser-Wakefield Accelerators (LWFAs) running at kHz repetition rates hold great potential for applications. They typically operate with lowenergy, 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.

Dates et versions

hal-05349126 , version 1 (05-11-2025)

Identifiants

Citer

J. Monzac, S. Smartsev, J. Huijts, L. Rovige, I A Andriyash, et al.. Differential pumping for kHz operation of a laser wakefield accelerator based on a continuously flowing hydrogen gas jet. Review of Scientific Instruments, 2025, 96 (4), ⟨10.1063/5.0246912⟩. ⟨hal-05349126⟩
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