TY  - JOUR
AU  - Togo, Satoshi
AU  - Takizuka, Tomonori
AU  - Reiser, Dirk
AU  - Sakamoto, Mizuki
AU  - Ogawa, Yuichi
AU  - Ezumi, Naomichi
AU  - Ibano, Kenzo
AU  - Nojiri, Kunpei
AU  - Li, Yue
AU  - Nakashima, Yousuke
TI  - Characteristics of plasma flow profiles in a super-X-divertor-like configuration
JO  - Nuclear materials and energy
VL  - 19
SN  - 2352-1791
CY  - Amsterdam [u.a.]
PB  - Elsevier
M1  - FZJ-2019-02904
SP  - 149 - 154
PY  - 2019
AB  - Plasma flow patterns in a super-X-divertor-like configuration are investigated by using a one-dimensional plasma fluid model with the anisotropic-ion pressure (AIP model). The AIP model enables to treat supersonic plasma flows self-consistently by describing the parallel plasma momentum transport with a hyperbolic equation keeping the finite effect of the parallel viscosity. A supersonic plasma flow in the diverging-magnetic-field divertor region is generated due to the magnetic nozzle effect. It is found that the sonic-transition point has bifurcation characteristics. A numerical solution from the AIP model agrees well with an analytical one. The Braginskii’s plasma fluid model, on the other hand, creates various unphysical profiles in the supersonic plasma flow region for different boundary conditions of the plasma flow at the sheath entrance. It is also found that a particle source/sink in front of the target brings about generations of subsonic/supersonic plasma flow profiles. Moving the target position, it is found that a discontinuous change in the sonic-transition point and corresponding profile of plasma flow can happen due to the bifurcating characteristics of the sonic-transition point.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000470746100024
DO  - DOI:10.1016/j.nme.2019.02.016
UR  - https://juser.fz-juelich.de/record/862648
ER  -