Phases of plasma produced with nanosecond laser

0488311 - ÚFP 2018 FR eng C - Konferenční příspěvek (zahraniční konf.)
Krása, J. - De Marco, M. - Cikhardt, Jakub - Pfeifer, Miroslav - Velyhan, A. - Klír, Daniel - Řezáč, Karel - Krůs, Miroslav - Dostál, Jan - Dudžák, Roman - Skála, Jiří
Phases of plasma produced with nanosecond laser.
EPS 2017: 44th European Physical Society Conference on Plasma Physics. Vol. 41F. Mulhouse: European Physical Society, 2017 - (Fajardo, M.; Westerhof, E.; Riconda, C.; Melzer, A.; Bret, A.; Dromey, B.), č. článku P2.205. Europhysics Conference Abstracts (ECA). ISBN 979-10-96389-07.
[EPS 2017 Conference on Plasma Physics/44./. Belfast (IE), 26.06.2017-30.06.2017]
Grant CEP: GA MŠMT LG15013; GA MŠMT(CZ) LM2015083
Institucionální podpora: RVO:61389021
Klíčová slova: nanosecond laser * X-ray
Obor OECD: Fluids and plasma physics (including surface physics)

Recent experimental studies have shown that the current balancing the charge occurred on a target irradiated with a laser can be used as a basic parameter for characterization of laser ablation. The time-resolved target current indicates the occurrence of various phases of the laser-produced plasma. During the first plasma phase defined by the duration of laser-target interaction, the time derivative of the target current matches the timeresolved laser intensity. The second phase of the laser-produced plasma starts after termination of the laser-matter interaction. For the entire duration of this active phase, the plasma surviving on the target surface emits transient electromagnetic radiation (EMP), X-ray radiation, and slow ions. This surface plasma causes the target charging balanced by a return target current on a time scale of 100 ns. Then the target holder acts as a probe, the signal of which can indicate a residual plasma persisting inside the target chamber on a time scale of microseconds.
Trvalý link: http://hdl.handle.net/11104/0282999