TY - JOUR
T1 - Serpent neutronics model of Wendelstein 7-X for 14.1 MeV neutrons
AU - Äkäslompolo, Simppa
AU - Koschinsky, Jan Paul
AU - Kontula, Joona
AU - Biedermann, Christoph
AU - Bozhenkov, Sergey
AU - Kurki-Suonio, Taina
AU - Leppänen, Jaakko
AU - Snicker, Antti
AU - Wolf, Robert
AU - Wurden, Glen
AU - W7-X Team
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 and 2019–2020 under grant agreement No 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission. This work was partially funded by the Academy of Finland project No. 328874 and No. 324759. The authors wish to acknowledge CSC – IT Center for Science, Finland, for computational resources as well as the Max-Planck computing & data facility for the same. The HPCE3 programme and Walter Ahlström foundation contributed to the funding of the work. The authors want to thank the operators and team at PTB for support during the measurements performed at the PTB ion accelerator facility, especially E. Pirovano, A. Lücke, M. Zboril and A. Zimbal.
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 and 2019–2020 under grant agreement No 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission. This work was partially funded by the Academy of Finland project No. 328874 and No. 324759. The authors wish to acknowledge CSC – IT Center for Science, Finland, for computational resources as well as the Max-Planck computing & data facility for the same. The HPCE programme and Walter Ahlström foundation contributed to the funding of the work. The authors want to thank the operators and team at PTB for support during the measurements performed at the PTB ion accelerator facility, especially E. Pirovano, A. Lücke, M. Zboril and A. Zimbal.
Publisher Copyright:
© 2021 The Author(s)
PY - 2021/6
Y1 - 2021/6
N2 - In this work, a Serpent 2 neutronics model of the Wendelstein 7-X (W7-X) stellarator is prepared, and an response function for the Scintillating-Fibre neutron detector (SciFi) is calculated using the model. The neutronics model includes the simplified geometry for the key components of the stellarator itself as well as the torus hall. The objective of the model is to assess the 14.1 MeV neutron flux from deuteron-triton fusions in W7-X, where the neutrons are modelled only until they have slowed down to 1 MeV energy. The key messages of this article are: demonstration of unstructured mesh geometry usage for stellarators, W7-X in particular; technical documentation of the model and first insights in fast neutron behaviour in W7-X, especially related to the SciFi: the model indicates that the superconducting coils are the strongest scatterers and block neutrons from large parts of the plasma. The back-scattering from e.g. massive steel support structures is found to be small. The SciFi will detect neutrons from an extended plasma volume in contrast to having an effective line-of-sight.
AB - In this work, a Serpent 2 neutronics model of the Wendelstein 7-X (W7-X) stellarator is prepared, and an response function for the Scintillating-Fibre neutron detector (SciFi) is calculated using the model. The neutronics model includes the simplified geometry for the key components of the stellarator itself as well as the torus hall. The objective of the model is to assess the 14.1 MeV neutron flux from deuteron-triton fusions in W7-X, where the neutrons are modelled only until they have slowed down to 1 MeV energy. The key messages of this article are: demonstration of unstructured mesh geometry usage for stellarators, W7-X in particular; technical documentation of the model and first insights in fast neutron behaviour in W7-X, especially related to the SciFi: the model indicates that the superconducting coils are the strongest scatterers and block neutrons from large parts of the plasma. The back-scattering from e.g. massive steel support structures is found to be small. The SciFi will detect neutrons from an extended plasma volume in contrast to having an effective line-of-sight.
KW - Neutrons
KW - Scintillating fibre
KW - Serpent
KW - Simulation
KW - Wendelstein 7-X
UR - http://www.scopus.com/inward/record.url?scp=85101074995&partnerID=8YFLogxK
U2 - 10.1016/j.fusengdes.2021.112347
DO - 10.1016/j.fusengdes.2021.112347
M3 - Article
AN - SCOPUS:85101074995
VL - 167
JO - Fusion Engineering and Design
JF - Fusion Engineering and Design
SN - 0920-3796
M1 - 112347
ER -