Results 101 to 110 of about 1,247 (174)

Gyrokinetic Field Theory as a Gauge Transform or: gyrokinetic theory without Lie transforms

, 2017
Gyrokinetic theory is a basis for treating magnetised plasma dynamics slower than particle gyrofrequencies where the scale of the background is larger than relevant gyroradii.
Scott, Bruce D.
core  

On the importance of parallel magnetic-field fluctuations for electromagnetic instabilities in STEP

Nuclear Fusion
This paper discusses the importance of parallel perturbations of the magnetic-field in gyrokinetic simulations of electromagnetic instabilities and turbulence at mid-radius in the burning plasma phase of the conceptual high- β , reactor-scale, tight ...
D. Kennedy, C.M. Roach, M. Giacomin, P.G. Ivanov, T. Adkins, F. Sheffield, T. Görler, A. Bokshi, D. Dickinson, H.G. Dudding, B.S. Patel   +10 more
doaj   +1 more source

A general framework for quantifying uncertainty at scale. [PDF]

Commun Eng, 2022
Farcaş IG, Merlo G, Jenko F.
europepmc   +1 more source

Beyond gyrokinetic theory

, 2023
In this work, the stability of ion Bernstein waves (IBWs) is extensively studied in various conditions. Analytical investigations of the dispersion relation are combined with numerical simulations with a novel 6D kinetic Vlasov code. In addition, the energy fluxes induced by such waves have been investigated.
openaire   +1 more source

Gyrokinetic microturbulence in transport barriers

, 2012
Modern fusion research aims at making the energy source of the sun accessible for electricity generation on earth. For this purpose, magnetically confined plasmas must be heated to very high temperatures of 100 million Kelvin. The resulting steep pressure gradients lead to turbulent mixing in the plasma, causing a drastic deterioration of particle and ...
openaire   +3 more sources

Kinetic plasma-wall interaction using immersed boundary conditions

Nuclear Fusion
The interaction between a plasma and a solid surface is studied in a (1D-1V) kinetic approach using immersed boundary conditions and penalization to model the wall.
Yann Munschy, Emily Bourne, Guilhem Dif-Pradalier, Peter Donnel, Philippe Ghendrih, Virginie Grandgirard, Yanick Sarazin   +6 more
doaj   +1 more source

Overview of multiscale turbulence studies covering ion-to-electron scales in magnetically confined fusion plasma

Nuclear Fusion
Turbulent transport in magnetically confined fusion plasma has conventionally been analyzed at the ion gyroradius scale based on the microturbulence theory.
S. Maeyama, N.T. Howard, J. Citrin, T.-H. Watanabe, T. Tokuzawa   +4 more
doaj   +1 more source

Negative triangularity scenarios: from TCV and AUG experiments to DTT predictions

Nuclear Fusion
Experiments, gyrokinetic simulations and transport predictions were performed to investigate if a negative triangularity (NT) L-mode option for the Divertor Tokamak Test (DTT) full-power scenario would perform similarly to the positive triangularity (PT)
A. Mariani, L. Aucone, A. Balestri, P. Mantica, G. Merlo, R. Ambrosino, F. Bagnato, L. Balbinot, J. Ball, T. Bolzonella, D. Brioschi, I. Casiraghi, A. Castaldo, S. Coda, L. Frassinetti, V. Fusco, T. Happel, J. Hobirk, P. Innocente, R.M. McDermott, P. Muscente, T. Pütterich, O. Sauter, F. Sciortino, M. Vallar, B. Vanovac, N. Vianello, G. Vlad, C.F.B. Zimmermann, the EUROfusion Tokamak Exploitation team, the TCV Team, the ASDEX Upgrade Team   +31 more
doaj   +1 more source

Influence of the density gradient on turbulent heat transport at ion-scales: an inter-machine study with the gyrokinetic code stella

Nuclear Fusion
Efficient control of turbulent heat transport is crucial for magnetic confinement fusion reactors. This work discusses the complex interplay between density gradients and microinstabilities, shedding light on their impact on turbulent heat transport in ...
H. Thienpondt, J.M. García-Regaña, I. Calvo, G. Acton, M. Barnes   +4 more
doaj   +1 more source

Gyrokinetic simulation of microtearing turbulence

, 2013
In modern fusion experiments, plasma turbulence is responsible for the radial heat transport and thus determines the plasma confinement within the magnetic field of tokamak devices. Deeper theoretical understanding is still needed and the detailed physical picture continues to evolve.
openaire   +3 more sources