Strong scattering during electron cyclotron resonance heating (ECRH) experiments in several magnetically confined fusion devices has been attributed to parametric decay instabilities (PDIs). Analytical modeling has shown that a non-monotonic density profile and excitation of trapped waves through two plasmon decay (TPD) play an important role. Using a particle-in-cell (PIC) code, decay of an X-mode wave into waves trapped inside a non-monotonic density profile is observed. The time evolution and composition of the daughter waves are investigated for different density profiles. A build up of the TPD daughter waves is only observed when they are supported by the plasma.
|Number of pages||4|
|Publication status||Published - 2019|
|Event||46th EPS Conference on Plasma Physics - Milan, Italy|
Duration: 8 Jul 2019 → 12 Sep 2019
|Conference||46th EPS Conference on Plasma Physics|
|Period||08/07/2019 → 12/09/2019|
Senstius, M. G., Nielsen, S. K., & Vann, R. G. L. (2019). Particle-in-cell simulations of two plasmon decay in a non-monotonic density profile. Paper presented at 46th EPS Conference on Plasma Physics, Milan, Italy.