TY - JOUR
T1 - Study of mirror effect on scrape-off layer-divertor plasma based on a generalized fluid model incorporating ion temperature anisotropy
AU - Togo, S.
AU - Takizuka, T.
AU - Reiser, D.
AU - Hoshino, Kazuo
AU - Ibano, K.
AU - Li, Y.
AU - Ogawa, Y.
AU - Sakamoto, M.
AU - Ezumi, N.
AU - Nakashima, Y.
PY - 2018/7/1
Y1 - 2018/7/1
N2 - The mirror effect on scrape-off layer (SOL)-divertor plasma profiles was studied by relaxing the assumption of homogeneous magnetic fields used in a one-dimensional (1D) plasma fluid model, which incorporates the anisotropic ion temperature. For collisionless plasmas, the perpendicular ion temperature proportional to the magnetic field strength is observed, which reflects the conservation of the magnetic moment. In diverging field cases, the plasma flow becomes supersonic, while it is kept subsonic in contracting field cases. Parallel momentum gains/losses and energy transfers between parallel and perpendicular components caused by the mirror effect are also observed. In addition, it is indicated that the viscous flux approximation is invalid in inhomogeneous magnetic fields regardless of the plasma collisionality.
AB - The mirror effect on scrape-off layer (SOL)-divertor plasma profiles was studied by relaxing the assumption of homogeneous magnetic fields used in a one-dimensional (1D) plasma fluid model, which incorporates the anisotropic ion temperature. For collisionless plasmas, the perpendicular ion temperature proportional to the magnetic field strength is observed, which reflects the conservation of the magnetic moment. In diverging field cases, the plasma flow becomes supersonic, while it is kept subsonic in contracting field cases. Parallel momentum gains/losses and energy transfers between parallel and perpendicular components caused by the mirror effect are also observed. In addition, it is indicated that the viscous flux approximation is invalid in inhomogeneous magnetic fields regardless of the plasma collisionality.
KW - mirror effect
KW - SOL-divertor plasma fluid simulation
KW - supersonic flow
KW - temperature anisotropy
UR - http://www.scopus.com/inward/record.url?scp=85052993501&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85052993501&partnerID=8YFLogxK
U2 - 10.1002/ctpp.201700170
DO - 10.1002/ctpp.201700170
M3 - Article
AN - SCOPUS:85052993501
VL - 58
SP - 556
EP - 562
JO - Contributions to Plasma Physics
JF - Contributions to Plasma Physics
SN - 0863-1042
IS - 6-8
ER -