PIC simulation study of the turbulence of the Alfven ion-cyclotron waves induced by electromagnetic ion-cyclotron instability
- Kaang, Helen H. (Department of Physics, POSTECH) ;
- Ryu, Chang-Mo (Department of Physics, POSTECH) ;
- Mok, Chinook (Department of Physics, POSTECH) ;
- Rha, Ki-Cheol (Department of Physics, POSTECH)
- Published : 2011.04.15
The turbulence in the nonlinear regime of the electromagnetic ion-cyclotron (EMIC) instability are investigated via a particle-in-cell (PIC) simulation. EMIC instability arises from anisotropic ion temperature and excites the Alfven ion-cyclotron (AIC) waves. The excited AIC waves undergo inverse-cascade via the nonlinear wave interaction of two AIC and one ion density modes. Induced ion density modes are the normal and second harmonic ion-acoustic (IA) waves. They have the same group velocity, but the second harmonic IA mode only generates the longitudinal electric field.