Plasma interaction with tungsten samples in the COMPASS tokamak in ohmic ELMy H-modes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F16%3A00460257" target="_blank" >RIV/61389021:_____/16:00460257 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1088/1742-6596/700/1/012008" target="_blank" >http://dx.doi.org/10.1088/1742-6596/700/1/012008</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1742-6596/700/1/012008" target="_blank" >10.1088/1742-6596/700/1/012008</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Plasma interaction with tungsten samples in the COMPASS tokamak in ohmic ELMy H-modes

Popis výsledku v původním jazyce

This paper reports experimental results on plasma interaction with tungsten samples with or without pre-grown He fuzz. Under the experimental conditions, arcing was observed on the fuzzy tungsten samples, resulting in localized melting of the fuzz structure that did not extend into the bulk. The Langmuir probes embedded in the divertor tiles on the COMPASS tokamak were used to measure a current-voltage probe characteristics, during ohmic ELMy H-modes reached in deuterium plasmas at a toroidal magnetic field 1.15 T, plasma current 300 kA and line-averaged electron density 5×1019 m−3. The data obtained between the ELMs were processed by the recently published first-derivative probe technique for precise determination of the plasma potential and the electron energy distribution function (EEDF).nThe spatial profile of the EEDF shows that at the high-field side it is Maxwellian with a temperature of 5 – 10 eV. The electron temperatures and the ion-saturation current density obtained were used to evaluate the radial distribution of the parallel power flux density as being in the order of 0.05 – 7 MW/m2.n

Název v anglickém jazyce

Plasma interaction with tungsten samples in the COMPASS tokamak in ohmic ELMy H-modes

Popis výsledku anglicky

This paper reports experimental results on plasma interaction with tungsten samples with or without pre-grown He fuzz. Under the experimental conditions, arcing was observed on the fuzzy tungsten samples, resulting in localized melting of the fuzz structure that did not extend into the bulk. The Langmuir probes embedded in the divertor tiles on the COMPASS tokamak were used to measure a current-voltage probe characteristics, during ohmic ELMy H-modes reached in deuterium plasmas at a toroidal magnetic field 1.15 T, plasma current 300 kA and line-averaged electron density 5×1019 m−3. The data obtained between the ELMs were processed by the recently published first-derivative probe technique for precise determination of the plasma potential and the electron energy distribution function (EEDF).nThe spatial profile of the EEDF shows that at the high-field side it is Maxwellian with a temperature of 5 – 10 eV. The electron temperatures and the ion-saturation current density obtained were used to evaluate the radial distribution of the parallel power flux density as being in the order of 0.05 – 7 MW/m2.n

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

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

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název statě ve sborníku

Journal of Physics Conference Series

ISBN

—

ISSN

1742-6588

e-ISSN

1742-6596

Počet stran výsledku

5

Strana od-do

012008

Název nakladatele

IOP Publishing, Ltd.

Místo vydání

Bristol

Místo konání akce

Sozopol

Datum konání akce

21. 9. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000432421500008