1D kinetic modelling of the JET SOL with tungsten divertor
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1D kinetic modelling of the JET SOL with tungsten divertor. / Tskhakaya, D.; Groth, M.; Contributors, JET EFDA.
In: Journal of Nuclear Materials, Vol. 438, No. Supplement, 07.2013, p. 522-525.Research output: Contribution to journal › Article › Scientific › peer-review
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T1 - 1D kinetic modelling of the JET SOL with tungsten divertor
AU - Tskhakaya, D.
AU - Groth, M.
AU - Contributors, JET EFDA
PY - 2013/7
Y1 - 2013/7
N2 - 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.
AB - 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.
KW - n/a
KW - n/a
U2 - 10.1016/j.jnucmat.2013.01.108
DO - 10.1016/j.jnucmat.2013.01.108
M3 - Article
VL - 438
SP - 522
EP - 525
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
SN - 0022-3115
IS - Supplement
ER -
ID: 961992