Comparison of ICRF and NBI Heated Plasmas Performances in the JET ITER-Like Wall

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F14%3A00435792" target="_blank" >RIV/61389021:_____/14:00435792 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1063/1.4864530" target="_blank" >http://dx.doi.org/10.1063/1.4864530</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.4864530" target="_blank" >10.1063/1.4864530</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Comparison of ICRF and NBI Heated Plasmas Performances in the JET ITER-Like Wall

Popis výsledku v původním jazyce

In this contribution we compare L-modes plasmas heated by ICRF or by Neutral Beam Injection (NET). ICRF heating as expected led to a much higher centrally peaked power deposition on the electrons and due to the central fast ion population to stronger sawtooth activity. Surprisingly, although a higher bulk radiation was observed during the ICRF phase, the thermal plasma energy was found similar for both cases, showing that a higher radiation inside the separatrix was not incompatible with an efficient central heating scheme. The higher radiation was attributed to the presence Tungsten (W). Tomographic inversion of SXR emissions allowed a precise observation of the sawtooth effect on the radiation pattern. W concentration profiles deconvolved from SXR emission showed the flattening of the profiles due to sawtooth for both heating and the peaking of the profiles in the NET case only hinting for extra transport effect in the ICRF case.

Název v anglickém jazyce

Comparison of ICRF and NBI Heated Plasmas Performances in the JET ITER-Like Wall

Popis výsledku anglicky

In this contribution we compare L-modes plasmas heated by ICRF or by Neutral Beam Injection (NET). ICRF heating as expected led to a much higher centrally peaked power deposition on the electrons and due to the central fast ion population to stronger sawtooth activity. Surprisingly, although a higher bulk radiation was observed during the ICRF phase, the thermal plasma energy was found similar for both cases, showing that a higher radiation inside the separatrix was not incompatible with an efficient central heating scheme. The higher radiation was attributed to the presence Tungsten (W). Tomographic inversion of SXR emissions allowed a precise observation of the sawtooth effect on the radiation pattern. W concentration profiles deconvolved from SXR emission showed the flattening of the profiles due to sawtooth for both heating and the peaking of the profiles in the NET case only hinting for extra transport effect in the ICRF case.

Druh

D - Stať ve sborníku

CEP obor

BL - Fyzika plasmatu a výboje v plynech

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název statě ve sborníku

AIP Conference Proceedings

ISBN

978-0-7354-1210-1

ISSN

0094-243X

e-ISSN

—

Počet stran výsledku

4

Strana od-do

231-234

Název nakladatele

American Institute of Physics

Místo vydání

Melville

Místo konání akce

Sorrento

Datum konání akce

25. 6. 2013

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000339626400035