1D kinetic modelling of the JET SOL with tungsten divertor

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date

2013-07

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Department of Applied Physics

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Language

en

Pages

4

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Journal of Nuclear Materials, Volume 438, issue Supplement, pp. 522-525

Abstract

In this work a fully kinetic model of the JET SOL with tungsten divertor plates has been developed. It includes the dynamics of main-ions (D+) and electrons, the neutrals (D, C, W) and the impurity particles (C+m, W+n). Our simulations show extremely low concentration of W impurity. We identify two reasons which are responsible for this effect: (1) for low temperature divertor plasma the energy of most of the main-ions and the impurities in a low-ionization state impinging the divertor plates is below the W-sputtering threshold energy; (2) with increasing temperature the W-sputtering increases, but the potential drop across the divertor plasma increases too, so that most of the W ions are reabsorbed at the divertors.

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DOI

10.1016/j.jnucmat.2013.01.108

Citation

Tskhakaya, D, Groth, M & Contributors, JET EFDA 2013, ' 1D kinetic modelling of the JET SOL with tungsten divertor ', Journal of Nuclear Materials, vol. 438, no. Supplement, pp. 522-525 . https://doi.org/10.1016/j.jnucmat.2013.01.108

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https://urn.fi/URN:NBN:fi:aalto-201705033736

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[article-cris] Perustieteiden korkeakoulu / SCI