Advanced diagnostics of electrons escaping from laser-produced plasma

0586831 - FZÚ 2025 RIV CH eng J - Journal Article
Krása, Josef - Krupka, Michal - Agarwal, Shubham - Nassisi, V. - Singh, Sushil K.
Advanced diagnostics of electrons escaping from laser-produced plasma.
Plasma. Roč. 7, č. 2 (2024), s. 366-385. E-ISSN 2571-6182
R&D Projects: GA MŠMT(CZ) LM2023068
Institutional support: RVO:68378271
Keywords : laser-produced plasma * return target current diagnostic * electric-potential plasma probe * target charge * multi-channel magnetic electron spectrometer
OECD category: Fluids and plasma physics (including surface physics)
Method of publishing: Open access

This article provides an up-to-date overview of the problems associated with the detection of hot electrons escaping from laser-produced plasma and corresponding return current flowing from the ground to the target, which neutralises the positive charge occurring on the target due to the escaped electrons. In addition, the target holder system acts as an antenna emitting an electromagnetic pulse (EMP), which is powered by the return target. If the amount of positive charge generated on the target is equal to the amount of charge carried away from the plasma by the escaping electrons, the measurement of the return current makes it possible to determine this charge, and thus also the number of escaped electrons. Methods of return current detection in the mA–10 kA range is presented, and the corresponding charge is compared to the charge determined using calibrated magnetic electron energy analysers.
Permanent Link: https://hdl.handle.net/11104/0354234