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  4. Conduction-based model of the Scrape-Off Layer power sharing between inner and outer divertor in diverted low-density tokamak plasmas
 
research article

Conduction-based model of the Scrape-Off Layer power sharing between inner and outer divertor in diverted low-density tokamak plasmas

Maurizio, R.
•
Duval, B.P.
•
Labit, B.
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March 22, 2019
Nuclear Materials and Energy

A simple analytic model for the repartition of the Scrape-Off Layer (SOL) exhaust power between the inner and outer divertors in a diverted low-density tokamak plasma is introduced. Electron heat conduction is assumed to dominate the heat transport, from the outboard mid-plane to the divertor targets, with no heat sinks or sources in the SOL. Both divertor channels are in the attached, high-recycling regime. The model is in reasonable qualitative agreement with recent TCV experimental data and EMC3-Eirene simulations. For the Single Null divertor, it reproduces the experimentally observed increase in the power ratio between the inner and outer divertor plates of TCV, with increasing the outer divertor leg length or the outer target flux expansion. For the Snowflake Minus configuration, it reproduces the observed variation of with X-point separation, although only for the reversed magnetic field direction. Within the model limitations, it provides a basic understanding of the power sharing in alternative divertor geometries.

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Type
research article
DOI
10.1016/j.nme.2019.03.020
Author(s)
Maurizio, R.
Duval, B.P.
Labit, B.
Reimerdes, Holger  
Theiler, Christian Gabriel  
Tsui, C.K.
Boedo, J.
De Oliveira, H.
Février, O.
Sheikh, U.
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Corporate authors
MST1 & TCV Teams
Date Issued

2019-03-22

Publisher

Elsevier

Published in
Nuclear Materials and Energy
Volume

19

Start page

372

End page

377

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
SPC  
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/143939
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