7 papers
Testing of the new JOREK stellarator-capable model in the tokamak limit
Nikita Nikulsin, Matthias Hoelzl, Alessandro Zocco +2
In preparation for extending the JOREK nonlinear MHD code to stellarators, a hierarchy of stellarator-capable reduced and full MHD models has been derived and tested. The derivatio…
Gyrokinetic investigation of Alfvén instabilities in the presence of turbulence
A. Biancalani, A. Bottino, A. Di Siena +10
The nonlinear dynamics of beta-induced Alfvén Eigenmodes (BAE) driven by energetic particles (EP) in the presence of ion-temperature-gradient (ITG) turbulence is investigated, by m…
Turbulent impurity transport simulations in Wendelstein 7-X plasmas
J. M. García-Regaña, M. Barnes, I. Calvo +8
A study of turbulent impurity transport by means of quasilinear and nonlinear gyrokinetic simulations is presented for Wendelstein 7-X (W7-X). The calculations have been carried ou…
A three-dimensional reduced MHD model consistent with full MHD
Nikita Nikulsin, Matthias Hoelzl, Alessandro Zocco +2
Within the context of a viscoresistive magnetohydrodynamic (MHD) model with anisotropic heat transport and cross-field mass diffusion, we introduce novel three-term representations…
Quasilinear particle transport from gyrokinetic instabilities in general magnetic geometry
Per Helander, Alessandro Zocco
The quasilinear particle flux arising from gyrokinetic instabilities is calculated in the electrostatic and collisionless approximation, keeping the geometry of the magnetic field…
Magnetic compressibility and ion-temperature-gradient-driven microinstabilities in magnetically confined plasmas
A. Zocco, P. Helander, J. W. Connor
The electromagnetic theory of the strongly driven ion-temperature-gradient (ITG) instability in magnetically confined toroidal plasmas is developed. Stabilizing and destabilizing e…