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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
High energy density plasma - induced transformations of early planetary atmospheres and their impact on early global climate
 Kaiserová, Tereza ; Ferus, Martin (advisor) ; Šponerová, Judit E. (referee)
The goal of this bachelor thesis is to explore one of possible solutions to faint young Sun paradox, namely greenhouse effect incurred by increased concentration of N2O induced due to high energy plasma of meteorite impact. The series of experiments were done to simulate early Earth atmosphere under the effect of impact. The results of experiments were evaluated by infrared spectroscopy. It was found that under the right circumstances, concentrations of N2O created by impacts go from 5 to 38 ppm, which is concentration high enough to resolve faint young Sun paradox. Results presented in this thesis lead us to new path of solving the faint young Sun paradox and offer many important information for prebiotic chemistry on early Earth.
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Formation of organics molecules initiated by high-power density energy events in planetary atmospheres
 Kamas, Michal ; Civiš, Svatopluk (advisor) ; Zelinger, Zdeněk (referee)
The focused laser beam delivered by the high-power laser system PALS was used for laboratory simulation of high-energy-density events in a planetary atmosphere. Several model gas mixtures were prepared to mimic the mildly reducing early Earth's atmosphere (CO-N2-H2O) as well as the atmosphere of Saturn's moon Titan and the strongly reducing early Earth's atmosphere (CH4-N2-H2O). In situ investigation of transient species generated by the laser-induced dielectric breakdown in the gaseous mixtures was performed by optical emission spectroscopy (OES). Final products of laser-plasma initiated chemical reactions were identified and determined by advanced mass-spectrometry (SIFT-MS) and absorption FT-IR spectroscopy. High-power laser system SOFIA was utilized to simulate in our laboratory a high-velocity impact into the icy satellites of the outer planets of the Solar system. OES was engaged in probing the plasmas produced by the SOFIA beam focused on ice surfaces (water, methanol, formamide), while final products were analyzed by means of gas chromatography (GC/MS) and mass-spectrometry (SIFT-MS).
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