Global linear and nonlinear gyrokinetic modelling of Alfvén eigenmodes in ITER

@article{HaywardSchneider2020GlobalLA,
  title={Global linear and nonlinear gyrokinetic modelling of Alfv{\'e}n eigenmodes in ITER},
  author={Thomas Hayward-Schneider and Philipp Lauber and Alberto Bottino and Z.X. Lu},
  journal={Nuclear Fusion},
  year={2020},
  volume={61}
}
Linear and nonlinear modelling of Alfvénic instabilities, most notably toroidal Alfvén eigenmodes (TAEs), obtained by using the global nonlinear electromagnetic gyrokinetic model of the code ORB5 are presented for the 15 MA scenario of the ITER tokamak. Linear simulations show that elliptic Alfvén eigenmodes and odd-parity TAEs are only weakly damped but not excited by alpha particles, whose drive favours even-parity TAEs. Low mode number TAEs are found to be global, requiring global treatment… Expand
2 Citations
Numerics and computation in gyrokinetic simulations of electromagnetic turbulence with global particle-in-cell codes
Electromagnetic turbulence is addressed in tokamak and stellarator plasmas with the global gyrokinetic particle-in-cell codes ORB5 (E Lanti et al, Comp. Phys. Comm., 251, 107072 (2020)) and EUTERPEExpand
Alpha particle driven Alfvénic instabilities in ITER post-disruption plasmas
Fusion-born alpha particles in ITER disruption simulations are investigated as a possible drive of Alfvénic instabilities. The ability of these waves to expel runaway electron (RE) seed particles isExpand

References

SHOWING 1-10 OF 28 REFERENCES
Nonlinear energetic particle transport in the presence of multiple Alfvénic waves in ITER
This work presents the results of a multi-mode iter study on toroidal Alfven eigenmodes (TAEs), using the nonlinear hybrid Hagis-Ligka model. It is found that main conclusions from earlier studies ofExpand
Local and global kinetic stability analysis of Alfvén eigenmodes in the 15 MA ITER scenario
The linear gyrokinetic spectral code LIGKA (Lauber et al 2007 J. Comput. Phys. 226 447–65) is used to examine the Alfven eigenmode stability properties of the ITER 15 MA scenario. It is shown that aExpand
Predictive nonlinear studies of TAE-induced alpha-particle transport in the Q = 10 ITER baseline scenario
We use the HAGIS code to compute the nonlinear stability of the Q = 10 ITER baseline scenario to toroidal Alfven eigenmodes (TAE) and the subsequent effects of these modes on fusion alpha-particleExpand
Systematic linear-stability assessment of Alfvén eigenmodes in the presence of fusion α-particles for ITER-like equilibria
A systematic approach to evaluate the linear stability of Alfven eigenmodes in the presence of fusion-born -particles is reported. The techniques developed are particularly useful when dealing withExpand
Comprehensive evaluation of the linear stability of Alfvén eigenmodes driven by alpha particles in an ITER baseline scenario
The linear stability of Alfven eigenmodes in the presence of fusion-born alpha particles is thoroughly assessed for two variants of an ITER baseline scenario, which differ significantly in their coreExpand
Alfvén eigenmode evolution computed with the VENUS and KINX codes for the ITER baseline scenario
A new application of the VENUS code is described, which computes alpha particle orbits in the perturbed electromagnetic fields and its resonant interaction with the toroidal Alfvén eigenmodes (TAEs)Expand
Kinetic theory of toroidicity-induced alfvén eigenmodes
An analytic kinetic description of the toroidicity‐induced Alfven eigenmode (TAE) is presented. The theory includes electron parallel dynamics nonperturbatively, an effect that is found to stronglyExpand
Physics of Alfvén waves and energetic particles in burning plasmas
Dynamics of shear Alfven waves and energetic particles are crucial to the performance of burning fusion plasmas. This article reviews linear as well as nonlinear physics of shear Alfven waves andExpand
Energetic particle drive for toroidicity-induced Alfven eigenmodes and kinetic toroidicity-induced Alfven eigenmodes in a low-shear tokamak
The structure of toroidicity-induced Alfven eigenmodes (TAE) and kinetic TAE (KTAE) with large mode numbers is analysed and the linear power transfer from energetic particles to these modes isExpand
Alfvénic instabilities driven by fusion generated alpha particles in ITER scenarios
The stability of proposed ITER scenarios with respect to low-medium mode number Alfvenic instabilities driven by fusion-produced alpha particles is investigated by hybrid MHD-particle simulations.Expand
...
1
2
3
...