Monitoring the removal of excited particles in He/Ar/H-2 low temperature afterglow plasma at 80-300 K

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10334259" target="_blank" >RIV/00216208:11320/16:10334259 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1051/epjap/2016150587" target="_blank" >http://dx.doi.org/10.1051/epjap/2016150587</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/epjap/2016150587" target="_blank" >10.1051/epjap/2016150587</a>

Result language
angličtina
Original language name
Monitoring the removal of excited particles in He/Ar/H-2 low temperature afterglow plasma at 80-300 K
Original language description
Stationary afterglow (SA) experiments with cavity ring down absorption spectrometer (cw-CRDS) have been used to study recombination of H-3(+) ions with electrons. To characterize the plasma during the afterglow we monitored the time evolution of density of He-2 excited dimers (a(3)Sigma(+)(u)) in plasmas in pure helium and in helium with small admixture of Ar and H-2. By monitoring the plasma decay and its dependence on [H2] and [Ar] in the afterglow in pure He and in He/Ar/H-2 mixture we estimated the rate of plasma thermalization in the temperature range of 80-300 K. The inferred deexcitation rate coefficients for reaction of helium metastable atoms with H-2 were (0.9 x 0.3) x10(-10) cm(3) s(-1), (1.9 x 0.2) x10(-10) cm(3) s(-1) and (2.7 x 0.2) x 10(-10) cm(3) s(-1) at 80 K, 140 K and 300 K, respectively. The effective recombination rate coefficients for H-3(+) were evaluated from the decay of the electron number density. We propose the lower estimate for the saturation of the effective recombination rate coefficient in H-3(+) and D-3(+) dominated plasma.
Czech name
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Czech description
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Type
J<sub>x</sub> - 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)

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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