Equilibrium in Low Temperature H3+-dominated Plasma, Application of Cavity Ring-Down Spectroscopy

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F12%3A10132621" target="_blank" >RIV/00216208:11320/12:10132621 - isvavai.cz</a>

Result on the web

<a href="http://auc.karlin.mff.cuni.cz" target="_blank" >http://auc.karlin.mff.cuni.cz</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Equilibrium in Low Temperature H3+-dominated Plasma, Application of Cavity Ring-Down Spectroscopy

Original language description

We examine establishing of a thermal equilibrium in a H3+-dominated plasma (produced by a microwave discharge ignited in He-Ar-H2 gas mixture) and in its afterglow at temperatures 77-220 K by Cavity Ring-Down Spectroscopy. With respect to the observed population of lowest rotational states of the ground vibrational state of H3+ ion, we conclude that the rotational temperature is well defined and stable. It is equal to the He buffer gas temperature and to the kinetic temperature of the ions. By using para-enriched H2 gas, we achieve high population of para nuclear spin states of H3+ ions in the discharge. This population is not constant in time and evolves towards a steady state (asymptotic) value which is not equal to the thermodynamic equilibrium value for a given temperature. The fact that the value of the steady state para-H3+ fraction does not vary with the concentration of para-enriched H2 indicates that degradation of para-enrichment of H2 in the discharge is negligible.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BL - Plasma physics and discharge through gases

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2012

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Acta Universitatis Carolinae - Mathematica et Physica

ISSN

0001-7140

e-ISSN

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Volume of the periodical

53

Issue of the periodical within the volume

1

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

8

Pages from-to

51-59

UT code for WoS article

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EID of the result in the Scopus database

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