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Electron-Ion Recombination at Temperatures below 300K
Kotrík, Tomáš ; Glosík, Juraj (advisor) ; Pysanenko, Andriy (referee) ; Trunec, David (referee)
Title: Recombination study of ions with electrons at temperatures below 300 K Author: Tomáš Kotrík Department: Department of Surface and Plasma Science Supervisor of the doctoral thesis: Prof. RNDr. Juraj Glosík, DrSc. Department of Surface and Plasma Science Abstract: Presented is the study of recombination of ions with electrons performed at low temperatures using the Flowing afterglow with Langmuir probe experimental technique. Studied was the dissociative recombination of H and D ions at temperatures 77 - 300 K. Apart from a two-body also a three-body recombination channel assisted by neutral He atoms was identified and studied. The obtained temperature dependence of the two-body recombination rate coefficient is in a good agreement with findings of other experimental and theoretical works. The dissociative recombination of HCO and DCO ions with electrons was studied in the temperature range 150 - 300 K. The observed temperature dependence of measured recombination rate coefficient for HCO and DCO ions (~T -1.3 and ~T -1.1 , respectively) is in agreement with the majority of previous experimental works and evokes that indirect mechanism governs the recombination process. The electron- assisted collisional-radiative recombination of Ar ions was for the first time studied at temperatures 50 - 300 K. The...
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Electron-Ion Recombination at Temperatures below 300K
Kotrík, Tomáš
Title: Recombination study of ions with electrons at temperatures below 300 K Author: Tomáš Kotrík Department: Department of Surface and Plasma Science Supervisor of the doctoral thesis: Prof. RNDr. Juraj Glosík, DrSc. Department of Surface and Plasma Science Abstract: Presented is the study of recombination of ions with electrons performed at low temperatures using the Flowing afterglow with Langmuir probe experimental technique. Studied was the dissociative recombination of H and D ions at temperatures 77 - 300 K. Apart from a two-body also a three-body recombination channel assisted by neutral He atoms was identified and studied. The obtained temperature dependence of the two-body recombination rate coefficient is in a good agreement with findings of other experimental and theoretical works. The dissociative recombination of HCO and DCO ions with electrons was studied in the temperature range 150 - 300 K. The observed temperature dependence of measured recombination rate coefficient for HCO and DCO ions (~T -1.3 and ~T -1.1 , respectively) is in agreement with the majority of previous experimental works and evokes that indirect mechanism governs the recombination process. The electron- assisted collisional-radiative recombination of Ar ions was for the first time studied at temperatures 50 - 300 K. The...
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Laboratory studies of ion-molecule reactions with molecular and atomic hydrogen at temperatures relevant to astrochemistry
Mulin, Dmytro ; Glosík, Juraj (advisor) ; Kotrík, Tomáš (referee) ; Španěl, Patrik (referee)
The results of the laboratory study of reaction rate coefficients of several ion- molecule reactions with atomic and molecular hydrogen and molecular deuterium at low temperatures are presented in the thesis. The reaction rate coefficients of the N+ and H+ reaction with H2 were measured with respect to the nuclear spin configuration and rotational excitation of H2. The reactions of anions were a subject of the isotope exchange and isotope effect study. The measurements of the rate coefficients of H2O and D2O formation in the reaction of O- with H2 and D2, isotope exchange reactions OH- + D2 and OD- + H2, and associative detachment and charge transfer channels of D- + H interaction were performed. Experiments were carried out using an AB-22PT instrument with an ion trap. It has producing, guiding, trapping, and detecting systems for ions and a separate source of atomic H. The cooling system allowed to measure the temperature dependencies of the reaction rate coefficients at temperatures relevant to astrochemistry (10 K - 300 K)
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Electron-Ion Recombination at Temperatures below 300K
Kotrík, Tomáš
Title: Recombination study of ions with electrons at temperatures below 300 K Author: Tomáš Kotrík Department: Department of Surface and Plasma Science Supervisor of the doctoral thesis: Prof. RNDr. Juraj Glosík, DrSc. Department of Surface and Plasma Science Abstract: Presented is the study of recombination of ions with electrons performed at low temperatures using the Flowing afterglow with Langmuir probe experimental technique. Studied was the dissociative recombination of H and D ions at temperatures 77 - 300 K. Apart from a two-body also a three-body recombination channel assisted by neutral He atoms was identified and studied. The obtained temperature dependence of the two-body recombination rate coefficient is in a good agreement with findings of other experimental and theoretical works. The dissociative recombination of HCO and DCO ions with electrons was studied in the temperature range 150 - 300 K. The observed temperature dependence of measured recombination rate coefficient for HCO and DCO ions (~T -1.3 and ~T -1.1 , respectively) is in agreement with the majority of previous experimental works and evokes that indirect mechanism governs the recombination process. The electron- assisted collisional-radiative recombination of Ar ions was for the first time studied at temperatures 50 - 300 K. The...
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Electron-Ion Recombination at Temperatures below 300K
Kotrík, Tomáš ; Glosík, Juraj (advisor) ; Pysanenko, Andriy (referee) ; Trunec, David (referee)
Title: Recombination study of ions with electrons at temperatures below 300 K Author: Tomáš Kotrík Department: Department of Surface and Plasma Science Supervisor of the doctoral thesis: Prof. RNDr. Juraj Glosík, DrSc. Department of Surface and Plasma Science Abstract: Presented is the study of recombination of ions with electrons performed at low temperatures using the Flowing afterglow with Langmuir probe experimental technique. Studied was the dissociative recombination of H and D ions at temperatures 77 - 300 K. Apart from a two-body also a three-body recombination channel assisted by neutral He atoms was identified and studied. The obtained temperature dependence of the two-body recombination rate coefficient is in a good agreement with findings of other experimental and theoretical works. The dissociative recombination of HCO and DCO ions with electrons was studied in the temperature range 150 - 300 K. The observed temperature dependence of measured recombination rate coefficient for HCO and DCO ions (~T -1.3 and ~T -1.1 , respectively) is in agreement with the majority of previous experimental works and evokes that indirect mechanism governs the recombination process. The electron- assisted collisional-radiative recombination of Ar ions was for the first time studied at temperatures 50 - 300 K. The...
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Reactions of molecular ions in low-temperature plasma
Rubovič, Peter ; Plašil, Radek (advisor) ; Kotrík, Tomáš (referee)
Xdzev pracc: Studinm rca,kci molokularmeh iontu v nizkoteplotnim plazmatu Autor: Peter Rubovic Katedra. (ustav): Katodra. fy/iky povrchu a plazmatu Vedonci bakalarske prace: RNDr. Radok Plasil. Ph.D. o-inail vedouciho: Radek.Plasil«i;n iff.cuni.cz Abstrakt: V predlo/enej ])i;ici skunuune reakcie molekularnych ionov v niz- koteplotnej plazme. Je popisany prineip a konslrukcia aparatury FALP (Flo- wing Afterglow with Langmuir Probe}, ])omocon ktorej skumame dohasinajucu plazmu pouzithn Langmnirovej (elektrostatickej) sondy. Zkonstrnovali snic ki- netieky model ehemickych reakeii a jcho ])ocitacovy model. Diskntnjeme vystup tohoto modelu - cn.sovy vyvoj koiicentracii j(xlnotlivyeh ionov a elektronov y>o- 7A\\7. prndovej trnbico. Zucastnili sine sa na i'i]jra,v<.; aparatnry FALP pro ]>otreby merania pri te])lotiich tekuteho dnsiku. C'ielbm prace je urcit rychlost.ny koefi- eient rekoinbinacie ionu HCO' s elektromni a jeho zavi.slost' na koiicentracii reaktantu ILj a teplote. Z nameranych /avislosti usud/ujeme, ze .sa jedna o di- sociativnn rckombinacin. Klicova slova: FALP, rekombinacia. kinetika reakeii, pocitacovy model Title: Reactions of Molecular Ions in Low-Temperature Plasma Author: Peter Rnbovic Department: Department of Surface and Plasma Science Supervisor: RNDr. Radek PlasiL Ph.D. Supervisor's e-mail...
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