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research article

First EMC3-Eirene simulations of the TCV snowflake divertor

Lunt, T.
•
Canal, G. P.
•
Feng, Y.
Show more
2014
Plasma Physics and Controlled Fusion

One of the approaches to solve the heat load problem in a divertor tokamak is the so called 'snowflake' (SF) configuration, a magnetic equilibrium with two nearby x-points and two additional divertor legs. Here we report on the first EMC3-Eirene simulations of plasma-and neutral particle transport in the scrape-off layer of a series of TCV SF equilibria with different values of sigma, the distance between the x-points normalized to the minor radius of the plasma. The constant cross-field transport coefficients were chosen such that the power-and particle deposition profiles at the primary inner strike point (SP) match the Langmuir probe measurements for the sigma = 0.1 case. At the secondary SP on the floor, however, a significantly larger power flux than that predicted by the simulation was measured by the probes, indicating an enhanced transport across the primary separatrix. As the ideal SF configuration (sigma = 0) is approached, the density as well as the radiation maximum are predicted to move from the target plates upward to the x-point by the simulation.

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Type
research article
DOI
10.1088/0741-3335/56/3/035009
Web of Science ID

WOS:000331896200009

Author(s)
Lunt, T.
Canal, G. P.
Feng, Y.
Reimerdes, H.
Duval, B. P.
Labit, B.
Vijvers, W.A.J.
Coster, D.
Lackner, K.
Wischmeier, M.
Date Issued

2014

Publisher

Institute of Physics

Published in
Plasma Physics and Controlled Fusion
Volume

56

Article Number

035009

Subjects

fusion

•

divertor

•

edge modeling

•

snowflake divertor

URL

URL

https://crpplocal.epfl.ch/pinboard/jpapers/1301908.pdf
Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
CRPP  
SPC  
Available on Infoscience
March 2, 2014
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/101247
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