Particle-in-cell simulations of two plasmon decay in a non-monotonic density profile

M. G. Senstius, S. K. Nielsen, R. G.L. Vann

Research output: Contribution to conferencePaperpeer-review


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.

Original languageEnglish
Publication statusPublished - 2019
Event46th European Physical Society Conference on Plasma Physics, EPS 2019 - Milan, Italy
Duration: 8 Jul 201912 Jul 2019


Conference46th European Physical Society Conference on Plasma Physics, EPS 2019

Bibliographical note

Funding Information:
This work has been supported by research grant 15483 from VILLUM FONDEN, it has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 and 2019-2020 under grant agreement No 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission. Furthermore, this work was performed using resources provided by the MARCONI HPC, the ARCHER HPC through grant EP/R029148/1, as well as by the Cambridge Service for Data Driven Discovery (CSD3) operated by the University of Cambridge Research Computing Service (, provided by Dell EMC and Intel using Tier-2 funding from the Engineering and Physical Sciences Research Council (capital grant EP/P020259/1), and DiRAC funding from the Science and Technology Facilities Council (

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