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physics.plasm-ph2025
Fast electrostatic microinstability evaluation in arbitrary toroidal magnetic geometry using a variational approach
M. C. L. Morren, P. Mulholland, J. H. E. Proll +5
Small-scale turbulence originating from microinstabilities limits the energy confinement time in magnetic confinement fusion. Here we develop a semi-analytical dispersion relation…
physics.plasm-ph2025
Resonant theory of kinetic ballooning modes in general toroidal geometry
P. Mulholland, A. Zocco, M. C. L. Morren +4
The linear theory of the kinetic-ballooning-mode (KBM) instability is extended to capture a weakly-driven regime in general toroidal geometry where the destabilization is caused by…
physics.plasm-ph2024
Influence of collisions on trapped-electron modes in tokamaks and low-shear stellarators
M. C. L. Morren, J. H. E. Proll, J. van Dijk +1
The influence of collisions on the growth rate of trapped-electron modes (TEMs) in core plasmas is assessed through both analytical linear gyrokinetics and linear gyrokinetic simul…