TY - JOUR
T1 - An extended kinetic model for the thermal force on impurity particles in weakly collisional plasmas
AU - Joint Special Design Team for Fusion DEMO
AU - Homma, Yuki
AU - Hoshino, Kazuo
AU - Tokunaga, Shinsuke
AU - Yamoto, Shohei
AU - Hatayama, Akiyoshi
AU - Asakura, Nobuyuki
AU - Sakamoto, Yoshiteru
AU - Tobita, Kenji
N1 - Funding Information:
The authors would like to express their deepest appreciation to Dr. K. Shimizu for insightful comments and suggestions.
Publisher Copyright:
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2018/7/1
Y1 - 2018/7/1
N2 - We have developed an extended kinetic model for the thermal force (Formula presented.) on test impurity particles in plasmas. This model makes use of a combination of the plasma ion heat flux qGM 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 (Formula presented.) weakens 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.
AB - We have developed an extended kinetic model for the thermal force (Formula presented.) on test impurity particles in plasmas. This model makes use of a combination of the plasma ion heat flux qGM 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 (Formula presented.) weakens 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.
KW - collisionality
KW - heat flux limiter
KW - impurity
KW - thermal force
KW - transport simulation
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U2 - 10.1002/ctpp.201700173
DO - 10.1002/ctpp.201700173
M3 - Article
AN - SCOPUS:85045221362
SN - 0863-1042
VL - 58
SP - 629
EP - 637
JO - Contributions to Plasma Physics
JF - Contributions to Plasma Physics
IS - 6-8
ER -