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Proceedings Paper

Large laser sparks for laboratory simulation of high-energy-density events in planetary atmospheres
Author(s): Dagmar Babankova; Libor Juha; Svatopluk Civias; Michal Bittner; Jaroslav Cihelka; Andrzej Bartnik; Henryk Fiedorowicz; Janusz Mikolajczyk; Leszek Ryc; Miroslav Pfeifer; Jiri Skala; Jiri Ullschmied
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Paper Abstract

Single ≤1 kJ pulses from a high-power laser are focused into molecular gases to create large laser sparks. This provides a unique way to mimic the chemical effects of high-energy-density events in planetary atmospheres (cometary impact, lightning) matching the natural energy-density, its spatio-temporal evolution and plasma-volume scaling of such events in a fully-controlled laboratory environment. Some chemical reactions initiated by laser-induced dielectric breakdown (LIDB) in both pure molecular gases and mixtures related to the chemical evolution of the Earth's early atmosphere were studied. Most of the experiments were carried out in a static gas cell. However, an initial series of experiments was also performed with a gas-puff target placed within a vacuum interaction chamber. Under these dynamic conditions the hot core of a laser spark can be directly investigated.

Paper Details

Date Published: 22 September 2005
PDF: 10 pages
Proc. SPIE 5906, Astrobiology and Planetary Missions, 590614 (22 September 2005); doi: 10.1117/12.618407
Show Author Affiliations
Dagmar Babankova, Institute of Physics (Czech Republic)
Charles Univ. in Prague (Czech Republic)
J. Heyrovsky Institute of Physical Chemistry (Czech Republic)
Libor Juha, Institute of Physics (Czech Republic)
Svatopluk Civias, J. Heyrovsky Institute of Physical Chemistry (Czech Republic)
Michal Bittner, Institute of Physics (Czech Republic)
Charles Univ. in Prague (Czech Republic)
Jaroslav Cihelka, J. Heyrovsky Institute of Physical Chemistry (Czech Republic)
Charles Univ. in Prague (Czech Republic)
Institute of Physics (Czech Republic)
Andrzej Bartnik, Military Univ. of Technology (Poland)
Henryk Fiedorowicz, Military Univ. of Technology (Poland)
Janusz Mikolajczyk, Military Univ. of Technology (Poland)
Leszek Ryc, Institute of Plasma Physics and Laser Microfusion (Poland)
Miroslav Pfeifer, Institute of Physics (Czech Republic)
Jiri Skala, Institute of Physics (Czech Republic)
Jiri Ullschmied, Institute of Plasma Physics (Czech Republic)


Published in SPIE Proceedings Vol. 5906:
Astrobiology and Planetary Missions
Richard B. Hoover; G. Randall Gladstone; Gilbert V. Levin; Alexei Yu. Rozanov, Editor(s)

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