The occurrence and damage of unipolar arcing on fuzzy tungsten

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F15%3A00450903" target="_blank" >RIV/61389021:_____/15:00450903 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.jnucmat.2014.09.009" target="_blank" >http://dx.doi.org/10.1016/j.jnucmat.2014.09.009</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jnucmat.2014.09.009" target="_blank" >10.1016/j.jnucmat.2014.09.009</a>

Result language

angličtina

Original language name

The occurrence and damage of unipolar arcing on fuzzy tungsten

Original language description

This research investigated whether unipolar arcing in the divertor of fusion reactors is a potential cause for enhanced wear of the divertor. It was found that 1 ?m of nano-fuzz growth is sufficient to initiate arcing, mainly depending on the sheath potential drop and electron density. The average mass loss rate induced by the arc was determined from mass loss measurements and found to be consistent with the value estimated from the arc current. The average arc track erosion depth was estimated by usingthe measured mass loss and damaged surface area and was found to be one tenth of the fuzzy layer thickness. Due to melting of the fuzzy structures the actual depth is larger and some arc tracks occasionally appeared to even reach the bulk beyond the fuzzy layer. The conclusion of this study is therefore that arcing in the divertor of future tokamaks (e.g. ITER) potentially is an important cause for surface damage and plasma pollution.

Czech name

—

Czech description

—

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JJ - Other materials

OECD FORD branch

—

Project

<a href="/en/project/GA14-12837S" target="_blank" >GA14-12837S: Interaction of hydrogen isotopes with candidate fusion materials</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2015

Confidentiality

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

Name of the periodical

Journal of Nuclear Materials

ISSN

0022-3115

e-ISSN

—

Volume of the periodical

463

Issue of the periodical within the volume

August

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

5

Pages from-to

303-307

UT code for WoS article

000358467200057

EID of the result in the Scopus database

2-s2.0-84937713116