ELM induced tungsten melting and its impact on tokamak operation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F15%3A00444973" target="_blank" >RIV/61389021:_____/15:00444973 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jnucmat.2014.08.062" target="_blank" >http://dx.doi.org/10.1016/j.jnucmat.2014.08.062</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jnucmat.2014.08.062" target="_blank" >10.1016/j.jnucmat.2014.08.062</a>

Jazyk výsledku

angličtina

Název v původním jazyce

ELM induced tungsten melting and its impact on tokamak operation

Popis výsledku v původním jazyce

In JET-ILW dedicated melt exposures were performed using a sequence of 3MA/2.9T H-Mode JET pulses with an input power of PIN = 23 MW, a stored energy of 6 MJ and regular type I ELMs at DWELM = 0.3 MJ and f ELM 30 Hz. In order to assess the risk of starting ITER operations with a full W divertor, one of the task was to measure the consequences of Wtransients melting due to ELMs. JET is the only tokamak able to produce transients/ ELMs large enough (>300 kJ per ELM) to facilitate melting of tungsten. SuchELMs are comparable to mitigated ELMs expected in ITER. By moving the outer strike point (OSP) onto a dedicated leading edge the base temperature was raised within 1 s to allow transient ELM-driven melting during the subsequent 0.5 s. Almost 1 mm (6mm3)of W was moved by 150 ELMs within 5 subsequent discharges. Significant material losses in terms of ejections into the plasma were not observed. There is indirect evidence that some small droplets (80 lm) were ejected.

Název v anglickém jazyce

ELM induced tungsten melting and its impact on tokamak operation

Popis výsledku anglicky

In JET-ILW dedicated melt exposures were performed using a sequence of 3MA/2.9T H-Mode JET pulses with an input power of PIN = 23 MW, a stored energy of 6 MJ and regular type I ELMs at DWELM = 0.3 MJ and f ELM 30 Hz. In order to assess the risk of starting ITER operations with a full W divertor, one of the task was to measure the consequences of Wtransients melting due to ELMs. JET is the only tokamak able to produce transients/ ELMs large enough (>300 kJ per ELM) to facilitate melting of tungsten. SuchELMs are comparable to mitigated ELMs expected in ITER. By moving the outer strike point (OSP) onto a dedicated leading edge the base temperature was raised within 1 s to allow transient ELM-driven melting during the subsequent 0.5 s. Almost 1 mm (6mm3)of W was moved by 150 ELMs within 5 subsequent discharges. Significant material losses in terms of ejections into the plasma were not observed. There is indirect evidence that some small droplets (80 lm) were ejected.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BG - Jaderná, atomová a molekulová fyzika, urychlovače

OECD FORD obor

—

Projekt

—

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

Journal of Nuclear Materials

ISSN

0022-3115

e-ISSN

—

Svazek periodika

463

Číslo periodika v rámci svazku

August

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

78-84

Kód UT WoS článku

000358467200012

EID výsledku v databázi Scopus

2-s2.0-84937724656