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Target current: An appropriate parameter for characterizing the dynamics of laser-matter interaction
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SYSNO ASEP 0508654 Document Type C - Proceedings Paper (int. conf.) R&D Document Type The record was not marked in the RIV Title Target current: An appropriate parameter for characterizing the dynamics of laser-matter interaction Author(s) Krása, J. (CZ)
Klír, Daniel (UFP-V) RID
Řezáč, Karel (UFP-V)
Cikhardt, Jakub (UFP-V) ORCID
Velyhan, A. (CZ)
Pfeifer, M. (CZ)
Dostál, Jan (UFP-V) RID, ORCID
Krůs, Miroslav (UFP-V) RID
Dudžák, Roman (UFP-V) RID, ORCID
Buryšková, S. (CZ)
Nassisi, V. (IT)
Delle Side, D. (IT)Number of authors 12 Article number 110420X Source Title Proceedings of SPIE The International Society for Optical Engineering. - Bellingham : SPIE, 2018 - ISSN 0277-786X - ISBN 9781510621350 Pages roč. 11042 (2018) Number of pages 6 s. Publication form Online - E Action 22nd International Symposium on High Power Laser Systems and Applications Event date 09.10.2018 - 12.10.2018 VEvent location Frascati Country IT - Italy Event type WRD Language eng - English Country US - United States Keywords laser produced-plasma ; phases of laser-produced plasma ; plasma barrier ; return target current Subject RIV BH - Optics, Masers, Lasers OECD category Optics (including laser optics and quantum optics) R&D Projects LM2015083 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CZ.02.1.01/0.0/0.0/16_013/0001552 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UFP-V - RVO:61389021 UT WOS 000459717900032 EID SCOPUS 85059891255 DOI 10.1117/12.2520177 Annotation A resistive target probes were employed to obtain unique characteristics of the dynamic of the laser-matter interaction through the observation of a return current neutralizing the positive target charge caused by electrons definitely leaving the plasma. Experimental observations show that three phases of the laser-produced plasma are well recognized, i.e. the plasma ignition phase, active plasma phase, and afterglow phase already for the lowest laser intensity at the focal point of 10 8 Wcm2 . Then, at higher intensities the first two phases strongly dominate and the target current reaches a value of 10 kA. A throughput of plasma barrier for the fastest electrons leaving the plasma is defined, and its value is experimentally estimated. We also present key experiments proving that the duration of the electrical charge on the target is much longer than the duration of the laser-plasma interaction for the entire intensity range. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2020
Number of the records: 1