58 citations · 196 across the 11 of their papers we have counts for
11 papers
Electromagnetic pressure-gradient-driven instabilities with moderate high mode numbers in tokamak plasmas
Yann Narbutt, Ksenia Aleynikova, Matthias Borchardt +6
Pressure gradient-driven instabilities are investigated in tokamak plasmas using the global gyrokinetic code EUTERPE emphasizing the role of moderate high mode numbers. As the norm…
Gyrokinetic particle-in-cell simulations of electromagnetic turbulence in the presence of fast particles and global modes
A. Mishchenko, A. Bottino, T. Hayward-Schneider +13
Global simulations of electromagnetic turbulence, collisionless tearing modes, and Alfven Eigenmodes in the presence of fast particles are carried out using the gyrokinetic particl…
Numerics and computation in gyrokinetic simulations of electromagnetic turbulence with global particle-in-cell codes
Alexey Mishchenko, Alessandro Biancalani, Alberto Bottino +7
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, vol. 251, 1070…
Gyrokinetic Stability of Electron-Positron-Ion Plasmas
Alexey Mishchenko, Alessandro Zocco, Per Helander +1
The gyrokinetic stability of electron-positron plasmas contaminated by ion (proton) admixture is studied in slab geometry. The appropriate dispersion relation is derived and solved…
Global Alfven Eigenmodes in the H-1 heliac
M. J. Hole, B. D. Blackwell, G. Bowden +5
Recent upgrades in H-1 power supplies have enabled the operation of the H-1 experiment at higher heating powers than previously attainable. A heating power scan in mixed hydrogen/h…
Semianalytical calculation of the zonal-flow oscillation frequency in stellarators
Pedro Monreal, Edilberto Sánchez, Iván Calvo +5
Due to their capability to reduce turbulent transport in magnetized plasmas, understanding the dynamics of zonal flows is an important problem in the fusion programme. Since the pi…
Linear gyrokinetic particle-in-cell simulations of Alfven instabilities in tokamaks
A. Biancalani, A. Bottino, S. Briguglio +6
The linear dynamics of Alfven modes in tokamaks is investigated here by means of the global gyrokinetic particle-in-cell code NEMORB. The model equations are shown and the local sh…
Calculation of continuum damping of Alfvén eigenmodes in 2D and 3D cases
G. W. Bowden, M. J. Hole, A. Könies
In ideal MHD, shear Alfvén eigenmodes may experience dissipationless damping due to resonant interaction with the shear Alfvén continuum. This continuum damping can make a signific…
Residual zonal flows in tokamaks and stellarators at arbitrary wavelengths
P. Monreal, I. Calvo, E. Sánchez +5
In the linear collisionless limit, a zonal potential perturbation in a toroidal plasma relaxes, in general, to a non-zero residual value. Expressions for the residual value in toka…
Pullback transformation in gyrokinetic electromagnetic simulations
Alexey Mishchenko, Axel Könies, Ralf Kleiber +1
It is shown that a considerable improvement in the global gyrokinetic electromagnetic simulations can be achieved by a slight modification of the simulation scheme. The new scheme…
Comparison of methods for numerical calculation of continuum damping
George Bowden, Axel Könies, Matthew Hole +2
Continuum resonance damping is an important factor in determining the stability of certain global modes in fusion plasmas. A number of analytic and numerical approaches have been d…