Electron Temperature Relaxation in Afterglow Plasmas: Diffusion Cooling

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F94%3A00003748" target="_blank" >RIV/00216224:14310/94:00003748 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Electron Temperature Relaxation in Afterglow Plasmas: Diffusion Cooling

Popis výsledku v původním jazyce

We have carried out a thorough theoretical analysis of the cooling and heating processes of the electron gas in Ne, Ar and Kr afterglow plasmas. Thus the rate of relaxation of the electron temperature, T(e), is seen to be in good agreement with the experimental measurements when spatial gradients of T(e) in the early afterglow and heating of the electron gas by superelastic collisions between the electrons and metastable atoms are accounted for. Al low pressures of the rare gases, p(g), the phenomenon of diffusion cooling occurs in which T(e) relaxes to an equilibrium temperature, T(ee), which is less than the gas temperature, T(g). This reduction in T(ee) below T(g) is mirrored in a reduction in the ambipolar diffusion coefficient, D(a), for the raregas atomic ions and electrons. Thus the D(a) can be calculated as a function of p(g) using the values of T(ee), and when this is done, properly accounting for the heating by metastable atoms, the calculated and experimental values of D(a)

Název v anglickém jazyce

Electron Temperature Relaxation in Afterglow Plasmas: Diffusion Cooling

Popis výsledku anglicky

We have carried out a thorough theoretical analysis of the cooling and heating processes of the electron gas in Ne, Ar and Kr afterglow plasmas. Thus the rate of relaxation of the electron temperature, T(e), is seen to be in good agreement with the experimental measurements when spatial gradients of T(e) in the early afterglow and heating of the electron gas by superelastic collisions between the electrons and metastable atoms are accounted for. Al low pressures of the rare gases, p(g), the phenomenon of diffusion cooling occurs in which T(e) relaxes to an equilibrium temperature, T(ee), which is less than the gas temperature, T(g). This reduction in T(ee) below T(g) is mirrored in a reduction in the ambipolar diffusion coefficient, D(a), for the raregas atomic ions and electrons. Thus the D(a) can be calculated as a function of p(g) using the values of T(ee), and when this is done, properly accounting for the heating by metastable atoms, the calculated and experimental values of D(a)

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BL - Fyzika plasmatu a výboje v plynech

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

1994

Kód důvěrnosti údajů

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

Název periodika

Contributions to Plasma Physics

ISSN

0005-8025

e-ISSN

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Svazek periodika

34

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

10

Strana od-do

69

Kód UT WoS článku

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EID výsledku v databázi Scopus

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