Speaker
A. S. Poulsen
Description
See the full Abstract at http://ocs.ciemat.es/EPS2018ABS/pdf/P4.1113.pdf
Multi-species Model for study of Ion Plasma Filaments
A. S. Poulsen1, V. Naulin1, J. J. Rasmussen1
1
Department of Physics, Technical University of Denmark, DK-2800 Kgs. Lyngby,
Denmark
In future devices as ITER the main fuel will be comprised of a mix of deuterium and
tritium to achieve burning plasma conditions. Additionally, in a burning plasma Helium and
radiating impurities are often main components which should be considered. In order to
further the understanding of the efect the plasma mix has on plasma turbulence and
transport it is necessary to be able to model the individual species separately.
We present results on the use of a multi-species model for simulating the infuence of
isotopes on transport and turbulence in the edge and SOL. The model is an extension of on
the four feld HESEL model¹, ion density and pressure equations for each new species is
considered.
We examine the infuence on multiple species with diferent mass and charge on the
propagation of blobs as a frst application of the enhanced code.
Simulations of seeded blobs show that ions with similar charge but diferent mass can be
sufficiently well described by using an efective mass for ions. However, when dealing with
multiple charge states, the system can no longer be described using an efective charge as in
particular the associated FLR efects difer leading diferent dynamics.
In general the use of a multi ion species model present a much more versatile tools as it can
describe systems that are ill suited for efective mass studies, such as local seeding of
neutral impurities.
¹Madsen, J. et al, Physics of Plasmas 23, 032306 (2016)
