Results 1 to 10 of about 464 (190)
Eigenmode stability analysis of drift-mirror modes in nonuniform plasmas [PDF]
Annales Geophysicae, 2006 Drift-mirror modes in a one-dimensional inhomogeneous model of the magnetosphere are studied by employing gyrokinetics, taking into account finite Larmor radius effects.
D. Yu. Klimushkin, L. Chen, L. Chen
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Validity of gyrokinetic theory in magnetized plasmas [PDF]
Communications PhysicsGyrokinetics, as a reduced kinetic theory derived from adiabaticity, provides a general framework for the long-term dynamics of magnetized plasmas. While its validity limits are stated in terms of formal expansion parameters, more quantitative test of ...
Haotian Chen +4 more
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Predictions of improved confinement in SPARC via energetic particle turbulence stabilization
Nuclear Fusion, 2023 The recent progress in high-temperature superconductor technologies has led to the design and construction of SPARC, a compact tokamak device expected to reach plasma breakeven with up to 25 MW of external ion cyclotron resonant heating (ICRH) power ...
A. Di Siena +10 more
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First-principles based plasma profile predictions for optimized stellarators
Nuclear Fusion, 2023 In the present Letter, first-of-its-kind computer simulations predicting plasma profiles for modern optimized stellarators—while self-consistently retaining neoclassical transport, turbulent transport with 3D effects, and external physical sources—are ...
A. Bañón Navarro +8 more
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Full-flux-surface effects on electrostatic turbulence in Wendelstein 7-X-like plasmas
Nuclear Fusion, 2023 We present the first nonlinear, gyrokinetic, surface-global simulations of a Wendelstein 7-X-like stellarator with kinetic electrons. As a first application, we investigate the interplay between Ion Temperature Gradient (ITG) and Trapped Electron Mode ...
Felix Wilms +2 more
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Theory and modeling of electron fishbones
New Journal of Physics, 2016 Internal kink instabilities exhibiting fishbone like behavior have been observed in a variety of experiments where a high energy electron population, generated by strong auxiliary heating and/or current drive systems, was present. After briefly reviewing
G Vlad +5 more
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Zonal flow excitation in electron-scale tokamak turbulence
Nuclear Fusion, 2023 The derivation of an intermediate-scale gyrokinetic-electron theory in nonuniform tokamak plasmas (Chen et al 2021 Nucl. Fusion 61 https://doi.org/10.1088/1741-4326/abf81a ) has shown that a Navier–Stokes type nonlinearity couples electron-temperature ...
Stefan Tirkas +4 more
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Isotope mass dependence of pedestal transport in JET H-mode plasmas
Nuclear Fusion, 2023 We present a comparative transport analysis of the isotope mass dependence in the pedestal of two pairs of deuterium/hydrogen type I ELMy H-mode discharges in JET with ITER-like wall, one characterized by the same input power, the other one by the same ...
I. Predebon +8 more
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Nuclear Fusion, 2023 Multi-scale gyrokinetic theory and simulations of a toroidal magnetized plasma have revealed the existence of cross-scale interactions of the trapped electron mode (TEM) and the electron temperature gradient (ETG) turbulence.
T.-H. Watanabe, S. Maeyama, M. Nakata
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Linear signatures in nonlinear gyrokinetics: interpreting turbulence with pseudospectra
New Journal of Physics, 2016 A notable feature of plasma turbulence is its propensity to retain features of the underlying linear eigenmodes in a strongly turbulent state—a property that can be exploited to predict various aspects of the turbulence using only linear information.
D R Hatch +5 more
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