TY - JOUR
T1 - Preliminary analysis of the efficiency of non-standard divertor configurations in DEMO
AU - Subba, F.
AU - Aho-Mantila, Leena
AU - Ambrosino, R.
AU - Coster, D.P.
AU - Pericoli-Ridolfini, V.
AU - Uccello, A.
AU - Zanino, R.
N1 - Funding Information:
This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the EURATOM Research and Training Programme 2014-2018 under grant agreement No 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission.
Funding Information:
This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the EURATOM Research and Training Programme 2014 - 2018 under grant agreement No 633053 . The views and opinions expressed herein do not necessarily reflect those of the European Commission.
Publisher Copyright:
© 2017
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2017/8/1
Y1 - 2017/8/1
N2 - The standard Single Null (SN) divertor is currently expected to be installed in DEMO. However, a number of alternative configurations are being evaluated in parallel as backup solutions, in case the standard divertor does not extrapolate successfully from ITER to a fusion power plant. We used the SOLPS code to produce a preliminary analysis of two such configurations, the X-Divertor (XD) and the Super X-Divertor (SX), and compare them to the SN solution. Considering the nominal power flowing into the SOL (PSOL = 150 MW), we estimated the amplitude of the acceptable DEMO operational space. The acceptability criterion was chosen as plasma temperature at the target lower than 5eV, providing low sputtering and at least partial detachment, while the operational space was defined in terms of the electron density at the outboard mid-plane separatrix and of the seeded impurity (Ar only in the present study) concentration. It was found that both the XD and the SXD extend the DEMO operational space, although the advantages detected so far are not dramatic. The most promising configuration seems to be the XD, which can produce acceptable target temperatures at moderate outboard mid-plane electron density (nomp=4.5 × 1019 m-3) and Zeff = 1.3.
AB - The standard Single Null (SN) divertor is currently expected to be installed in DEMO. However, a number of alternative configurations are being evaluated in parallel as backup solutions, in case the standard divertor does not extrapolate successfully from ITER to a fusion power plant. We used the SOLPS code to produce a preliminary analysis of two such configurations, the X-Divertor (XD) and the Super X-Divertor (SX), and compare them to the SN solution. Considering the nominal power flowing into the SOL (PSOL = 150 MW), we estimated the amplitude of the acceptable DEMO operational space. The acceptability criterion was chosen as plasma temperature at the target lower than 5eV, providing low sputtering and at least partial detachment, while the operational space was defined in terms of the electron density at the outboard mid-plane separatrix and of the seeded impurity (Ar only in the present study) concentration. It was found that both the XD and the SXD extend the DEMO operational space, although the advantages detected so far are not dramatic. The most promising configuration seems to be the XD, which can produce acceptable target temperatures at moderate outboard mid-plane electron density (nomp=4.5 × 1019 m-3) and Zeff = 1.3.
KW - advanced divertor
KW - DEMO
KW - detachment
KW - numerical modeling
UR - http://www.scopus.com/inward/record.url?scp=85020481413&partnerID=8YFLogxK
U2 - 10.1016/j.nme.2017.04.003
DO - 10.1016/j.nme.2017.04.003
M3 - Article
SN - 2352-1791
VL - 12
SP - 967
EP - 972
JO - Nuclear Materials and Energy
JF - Nuclear Materials and Energy
ER -
