Bi-Maxwellian electron energy distribution function in the vicinity of the last closed flux surface in fusion plasma

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F15%3A00453276" target="_blank" >RIV/61389021:_____/15:00453276 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1088/0741-3335/57/11/115011" target="_blank" >http://dx.doi.org/10.1088/0741-3335/57/11/115011</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/0741-3335/57/11/115011" target="_blank" >10.1088/0741-3335/57/11/115011</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Bi-Maxwellian electron energy distribution function in the vicinity of the last closed flux surface in fusion plasma

Popis výsledku v původním jazyce

The first-derivative probe technique was applied to derive data for plasma parameters from the IV Langmuir probe characteristics measured in the plasma boundary region in the COMPASS tokamak and in the TJ-II stellarator. It is shown that in the COMPASS tokamak in the vicinity of the last closed flux surface (LCFS) the electron energy distribution function (EEDF) is bi-Maxwellian with the low-temperature electron fraction predominating over the higher temperature one, whereas in the far scrape-off layer(SOL) the EEDF is Maxwellian. The mechanism for the appearance of a bi-Maxwellian EEDF in the vicinity of the LCFS is discussed. The comparison of the results from probe measurements with ASTRA package and EIRENE code calculations suggests that the mainreason of the appearance of a bi-Maxwellian EEDF in the vicinity of the LCFS is the ionization of the neutral atoms. It is shown that in the SOL the radial distribution of the parallel power flux density is a double exponential.

Název v anglickém jazyce

Bi-Maxwellian electron energy distribution function in the vicinity of the last closed flux surface in fusion plasma

Popis výsledku anglicky

The first-derivative probe technique was applied to derive data for plasma parameters from the IV Langmuir probe characteristics measured in the plasma boundary region in the COMPASS tokamak and in the TJ-II stellarator. It is shown that in the COMPASS tokamak in the vicinity of the last closed flux surface (LCFS) the electron energy distribution function (EEDF) is bi-Maxwellian with the low-temperature electron fraction predominating over the higher temperature one, whereas in the far scrape-off layer(SOL) the EEDF is Maxwellian. The mechanism for the appearance of a bi-Maxwellian EEDF in the vicinity of the LCFS is discussed. The comparison of the results from probe measurements with ASTRA package and EIRENE code calculations suggests that the mainreason of the appearance of a bi-Maxwellian EEDF in the vicinity of the LCFS is the ionization of the neutral atoms. It is shown that in the SOL the radial distribution of the parallel power flux density is a double exponential.

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

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Plasma Physics and Controlled Fusion

ISSN

0741-3335

e-ISSN

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Svazek periodika

57

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

115011-115011

Kód UT WoS článku

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EID výsledku v databázi Scopus

2-s2.0-84945549134