Speaker
Kwan Chul Lee
Description
See the full Abstract at http://ocs.ciemat.es/EPS2018ABS/pdf/P1.4017.pdf
Similarity study of black aurora to tokamak boundary: electric field and
vortex structure
Kwan Chul Lee1
1
National Fusion Research Institute, Daejeon, Korea
Three examples of electric field formations in the plasma are analysed based on a new
mechanism driven by the ion-neutral collisions. Recently developed Gyro-Center Shift
analysis includes perpendicular current which is induced by the momentum exchange
between ion and neutral when there is asymmetry over the gyro-motion. The first example is
radial electric field formation at the boundary of nuclear fusion devices which is a key player
for the high confinement mode operation of future fusion reactors. The second example is
reversed rotation of arc discharge cathode spot that has been a mysterious subject for more
than hundred years. The third example is electric field formations in earth ionosphere which
are important components of equatorial electrojet and black aurora. The black aurora has
been a mysterious subject for decades since it has two interesting features which are the
strong electric field and breaking into array of circular structure. The process of one method
that explains various examples from different plasmas will be presented. The basic ideas of
the mechanism for the vortex structure in the black aurora and the ELM formation of
tokamak will be discussed.
