The effect of high-flux H plasma exposure with simultaneous transient heat loads on tungsten surface damage and power handling

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F14%3A00439649" target="_blank" >RIV/61389021:_____/14:00439649 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1088/0029-5515/54/12/123010" target="_blank" >http://dx.doi.org/10.1088/0029-5515/54/12/123010</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/0029-5515/54/12/123010" target="_blank" >10.1088/0029-5515/54/12/123010</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The effect of high-flux H plasma exposure with simultaneous transient heat loads on tungsten surface damage and power handling

Popis výsledku v původním jazyce

The performance of the full-W ITER divertor may be significantly affected by the interplay between steady-state plasma exposure and transient events. To address this issue, the effect of a high-flux H plasma on the thermal shock response of W to ELM-liketransients has been investigated. Transient heating of W targets is performed by means of a high-power Nd:YAG laser with simultaneous exposure to H plasma in the linear device Magnum-PSI. The effects of simultaneous exposure to laser and plasma have been compared to those sequentially and to laser only. Transient melting is found to be aggravated during plasma exposure and to occur at lower heat flux parameters. Roughness and grain growth are observed to be driven by peak temperature, rather than by the loading conditions. The temperature evolution of the W surface under a series of transients is recorded by fast infrared thermography. By accounting for changes in the reflectivity at the damaged surface as measured by ellipsometry

Název v anglickém jazyce

The effect of high-flux H plasma exposure with simultaneous transient heat loads on tungsten surface damage and power handling

Popis výsledku anglicky

The performance of the full-W ITER divertor may be significantly affected by the interplay between steady-state plasma exposure and transient events. To address this issue, the effect of a high-flux H plasma on the thermal shock response of W to ELM-liketransients has been investigated. Transient heating of W targets is performed by means of a high-power Nd:YAG laser with simultaneous exposure to H plasma in the linear device Magnum-PSI. The effects of simultaneous exposure to laser and plasma have been compared to those sequentially and to laser only. Transient melting is found to be aggravated during plasma exposure and to occur at lower heat flux parameters. Roughness and grain growth are observed to be driven by peak temperature, rather than by the loading conditions. The temperature evolution of the W surface under a series of transients is recorded by fast infrared thermography. By accounting for changes in the reflectivity at the damaged surface as measured by ellipsometry

Druh

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

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

<a href="/cs/project/GA14-12837S" target="_blank" >GA14-12837S: Interakce izotopů vodíku s fúzními materiály</a><br>

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

Nuclear Fusion

ISSN

0029-5515

e-ISSN

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Svazek periodika

54

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

AT - Rakouská republika

Počet stran výsledku

11

Strana od-do

123010-123010

Kód UT WoS článku

000345579800016

EID výsledku v databázi Scopus

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