Electron Acceleration in Nitrogen Clusters by Terawatt Femtosecond Laser

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发表日期：

2024年10月1日

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M. M. Nazarov,
T. A. Semenov,
A. A. Tausenev,
M. V. Chaschin,
P. A. Shcheglov,
A. V. Lazarev,
D. A. Sidorov-Biryukov,
A. V. Mitrofanov,
V. M. Gordienko,
V. Ya. Panchenko

摘要

Narrowly divergent high-energy electron beam is experimentally demonstrated during the interaction of terawatt Ti:Sa laser radiation with a nitrogen gas-cluster jet at gas pressure corresponding to the boundary of the condensation region. A collimated electron beam with an energy of up to 10 MeV and a divergence of 10 mrad at a plasma concentration of ~10¹⁹ cm^–3 is obtained. The use of nitrogen instead of argon or krypton significantly improves the spatial (divergence) and energy (charge and spectrum shape) properties of the generated electron beam. The formation of clusters in a supersonic jet is observed and their composition is thermodynamically analyzed.