35 citations · 432 across the 26 of their papers we have counts for
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Analysis of Alfven Eigenmodes destabilization by energetic particles in TJ-II using a Landau-closure model
J. Varela, D. Spong, L. Garcia
Alfven Eigenmodes (AE) can be destabilized by energetic particles in neutral beam injection (NBI) heated plasmas through inverse Landau damping and couplings with gap modes in the…
Effects of turbulence, resistivity and boundary conditions on helicoidal flow collimation: consequences for the Von-Kármán-Sodium dynamo experiment
J. Varela, S. Brun, B. Dubrulle +1
We present hydrodynamic and magneto-hydrodynamic simulations of a liquid sodium flow using the compressible MHD code PLUTO to investigate the magnetic field regeneration in the Von…
Analysis of Alfven Eigenmodes destabilization by energetic particles in Large Helical Device using a Landau-closure model
J. Varela, D. A. Spong, L. Garcia
Energetic particle populations in nuclear fusion experiments can destabilize Alfv\' en Eigenmodes through inverse Landau damping and couplings with gap modes in the shear Alfv\' en…
Magnetic turbulence and pressure gradient feedback effect of the mode soft-hard MHD limit in Large Helical Device
J. Varela, K. Y. Watanabe, S. Ohdachi +1
The aim of this study is to analyze the feedback process between the magnetic turbulence and the pressure gradients in LHD inward-shifted configurations as well as its role in the…
Hard MHD limit in sawtooth like activity in LHD
J. Varela, K. Y. Watanabe, S. Ohdachi +1
The optimization of LHD discharges in inward-shifted configurations with sawtooth like activity is an open issue. These relaxation events limit the LHD performance driving a…
The internal disruption as hard MHD limit of 1/2 sawtooth like activity in Large Helical Device
J. Varela, K. Y. Watanabe, S. Ohdachi
LHD inward-shifted configurations are unstable to resistive MHD pressure-gradient-driven modes. Sawtooth like activity was observed during LHD operation. The main drivers are the u…
Internal disruptions and sawtooth like activity in LHD
J. Varela, L. Garcia, S. Ohdachi +2
LHD inward-shifted configurations are unstable to resistive MHD pressure-gradient-driven modes. These modes drive sawtooth like events during LHD operation. In this work, we simula…