Ion cyclotron resonance frequency heating in JET during initial operations with the ITER-like wall

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F14%3A00435645" target="_blank" >RIV/61389021:_____/14:00435645 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1063/1.4884354" target="_blank" >http://dx.doi.org/10.1063/1.4884354</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.4884354" target="_blank" >10.1063/1.4884354</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Ion cyclotron resonance frequency heating in JET during initial operations with the ITER-like wall

Popis výsledku v původním jazyce

In 2011/12, JET started operation with its new ITER-Like Wall (ILW) made of a tungsten (W) divertor and a beryllium (Be) main chamber wall.The impact of the new wall materials on the JET Ion Cyclotron Resonance Frequency (ICRF) operation is assessed andsome important properties of JET plasmas heated with ICRF are highlighted. A similar to 20% reduction of the antenna coupling resistance is observed with the ILW as compared with the JET carbon (JET-C) wall. Heat-fluxes on the protecting limiters close the antennas, quantified using Infra-Red thermography (maximum 4.5MW/m(2) in current drive phasing), are within the wall power load handling capabilities. A simple RF sheath rectification model using the antenna near-fields calculated with the TOPICA codecan reproduce the heat-flux pattern around the antennas. ICRF heating results in larger tungsten and nickel (Ni) contents in the plasma and in a larger core radiation when compared to Neutral Beam Injection (NBI) heating.

Název v anglickém jazyce

Ion cyclotron resonance frequency heating in JET during initial operations with the ITER-like wall

Popis výsledku anglicky

In 2011/12, JET started operation with its new ITER-Like Wall (ILW) made of a tungsten (W) divertor and a beryllium (Be) main chamber wall.The impact of the new wall materials on the JET Ion Cyclotron Resonance Frequency (ICRF) operation is assessed andsome important properties of JET plasmas heated with ICRF are highlighted. A similar to 20% reduction of the antenna coupling resistance is observed with the ILW as compared with the JET carbon (JET-C) wall. Heat-fluxes on the protecting limiters close the antennas, quantified using Infra-Red thermography (maximum 4.5MW/m(2) in current drive phasing), are within the wall power load handling capabilities. A simple RF sheath rectification model using the antenna near-fields calculated with the TOPICA codecan reproduce the heat-flux pattern around the antennas. ICRF heating results in larger tungsten and nickel (Ni) contents in the plasma and in a larger core radiation when compared to Neutral Beam Injection (NBI) heating.

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

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 periodika

Physics of Plasmas

ISSN

1070-664X

e-ISSN

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Svazek periodika

21

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

061510-061510

Kód UT WoS článku

000338995300016

EID výsledku v databázi Scopus

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