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An extended kinetic model for the thermal force on impurity particles in weakly collisional plasmas
Author(s) -
Homma Yuki,
Hoshino Kazuo,
Tokunaga Shinsuke,
Yamoto Shohei,
Hatayama Akiyoshi,
Asakura Nobuyuki,
Sakamoto Yoshiteru,
Tobita Kenji
Publication year - 2018
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.201700173
Subject(s) - collisionality , plasma , tokamak , physics , kinetic energy , impurity , atomic physics , heat flux , transient (computer programming) , ion , thermal , mechanics , classical mechanics , thermodynamics , heat transfer , quantum mechanics , computer science , operating system
We have developed an extended kinetic model for the thermal force F ∇ ∥ Ton test impurity particles in plasmas. This model makes use of a combination of the plasma ion heat flux q GM derived from the generalized moment equations (E. Zawaideh et al., Phys. Fluids 1988 , 31) and the numerical algorithm presented earlier (Y. Homma, A. Hatayama, J. Comput. Phys . 2013 , 250). The applicable condition extends from collisional to weakly collisional plasmas, and F ∇ ∥ Tweakens when the plasma collisionality decreases. A test simulation is performed assuming a tentative weakly collisional plasma. The results show that it can have a non‐negligible influence on transient impurity transport in a DEMO‐scale tokamak to take into account the effect of plasma collisionality in thermal force modelling.