TY - JOUR
T1 - Electromagnetic High Frequency Gyrokinetic Particle-in-Cell Simulation
AU - R. A. Kolesnikov, W. W. Lee & H. Qin
JO - Communications in Computational Physics
VL - 3
SP - 575
EP - 591
PY - 2008
DA - 2008/09
SN - 4
DO - http://doi.org/
UR - https://global-sci.org/intro/article_detail/cicp/7805.html
KW - 
AB - <p style="text-align: justify;">Using the gyrocenter-gauge kinetic theory, an electromagnetic version of
the high frequency gyrokinetic numerical algorithm for particle-in-cell simulation has
been developed. The new algorithm, being an alternative to a direct Lorentz-force
simulation, offers an efficient way to simulate the dynamics of plasma heating and
current drive with radio frequency waves. Gyrokinetic formalism enables separation
of gyrocenter and gyrophase motions of a particle in a strong magnetic field. From
this point of view, a particle may be viewed as a combination of a slow gyrocenter and
a quickly changing Kruskal ring. In this approach, the nonlinear dynamics of high
frequency waves is described by the evolution of Kruskal rings based on first principles physics. The efficiency of the algorithm is due to the fact that the simulation
particles are advanced along the slow gyrocenter orbits, while the Kruskal rings capture fast gyrophase physics. Moreover, the gyrokinetic formalism allows separation
of the cold response from kinetic effects in the current, which allows one to use much
smaller number of particles than what is required by a direct Lorentz-force simulation.
Also, the new algorithm offers the possibility to have particle refinement together with
mesh refinement, when necessary. To illustrate the new algorithm, a simulation of
the electromagnetic low-hybrid wave propagating in inhomogeneous magnetic field
is presented.</p>