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Target return current in low-intensity laser target interaction
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SYSNO ASEP 0535652 Document Type K - Proceedings Paper (Czech conf.) R&D Document Type Conference Paper Title Target return current in low-intensity laser target interaction Author(s) Krása, Josef (FZU-D) RID, ORCID
Klír, D. (CZ)
Řezáč, K. (CZ)
Cikhardt, J. (CZ)
Pfeifer, Miroslav (FZU-D) RID, ORCID, SAI
Dostál, Jan (FZU-D) ORCID
Dudžák, Roman (FZU-D) RID, ORCID
Nassisi, V. (IT)Article number 110350G Source Title Optics Damage and Materials Processing by EUV/X-ray Radiation VII. - Bellingham : SPIE, 2019 / Juha L. ; Bajt S. ; Guizard S. - ISSN 0277-786X - ISBN 978-151062736-9
S. 1-8Number of pages 8 s. Publication form Print - P Action Conference on Optics Damage and Materials Processing by EUV/X-Ray Radiation VII Event date 01.04.2019 - 03.04.2019 VEvent location Prague Country CZ - Czech Republic Event type WRD Language eng - English Country US - United States Keywords laser-produced plasma, ; plasma polarization ; target charge ; return target current ; intensity threshold of target surface ionization Subject RIV BH - Optics, Masers, Lasers OECD category Fluids and plasma physics (including surface physics) Institutional support FZU-D - RVO:68378271 UT WOS 000489750600003 EID SCOPUS 85073898073 DOI 10.1117/12.2522511 Annotation Laser-target interaction experiments demonstrated that the return target current, jTC(t), which neutralizes the target charge appearing when the fastest electrons escape the plasma, is one of principal characteristics of the laser-matter interaction. jTC(t) flowing between the target and the ground is emerging just when the laser intensity exceeds the threshold intensity of the plasma formation. The experimental determination of the number of escaped electrons is primarily based on precise target current observations. We present the experimental observation of jTC(t) neutralizing metallic and plastic targets irradiated with low intensity ranging from 108 to 1013 W/cm2 delivered by KrF and iodine lasers operated at 248-nm and 1315-nm wavelengths, respectively. Our experiments show that the charge appears on targets continuously not only during the laser-plasma interaction but also during the plasma expansion into the vacuum. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2021
Number of the records: 1