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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

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

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2015

Confidentiality

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

Name of the periodical

Plasma Physics and Controlled Fusion

ISSN

0741-3335

e-ISSN

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Volume of the periodical

57

Issue of the periodical within the volume

11

Country of publishing house

GB - UNITED KINGDOM

Number of pages

12

Pages from-to

115011-115011

UT code for WoS article

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EID of the result in the Scopus database

2-s2.0-84945549134