86 citations · 195 across the 17 of their papers we have counts for
17 papers
Measurement of zero-frequency fluctuations generated by coupling between Alfven modes in the JET tokamak
Juan Ruiz Ruiz, Jeronimo Garcia, Michael Barnes +13
We report the first experimental detection of a zero-frequency fluctuation that is pumped by an Alfvèn mode in a magnetically confined plasma. Core-localized bidirectional Alfvèn m…
Stable Deuterium-Tritium burning plasmas with improved confinement in the presence of energetic-ion instabilities
Jeronimo Garcia, Yevgen Kazakov, Rui Coelho +18
Providing stable and clean energy sources is a necessity for the increasing demands of humanity. Energy produced by fusion reactions, in particular in tokamaks, is a promising path…
Simultaneous measurements of unstable and stable Alfvén Eigenmodes in JET
R. A. Tinguely, J. Gonzalez-Martin, P. G. Puglia +13
In this paper, we report the novel experimental observation of both unstable and stable Toroidicity-induced Alfvén Eigenmodes (TAEs) measured simultaneously in a JET tokamak plasma…
The hidden uncertainties in particle balance calculations and their implications for assessment of plasma performance
A. A. Teplukhina, F. M. Poli, M. Podesta +6
Predictive simulations of mixed plasma discharges, like deuterium-tritium plasmas, rely on self-consistent models for particle transport. These models have to be validated with int…
A novel measurement of marginal Alfvén Eigenmode stability during high power auxiliary heating in JET
R. A. Tinguely, N. Fil, P. G. Puglia +15
The interaction of Alfvén Eigenmodes (AEs) and energetic particles is one of many important factors determining the success of future tokamaks. In JET, eight in-vessel antennas wer…
Representation and modeling of charged particle distributions in tokamaks
Andreas Bierwage, Michael Fitzgerald, Philipp Lauber +3
Experimental diagnostics, analysis tools and simulations represent particle distributions in various forms and coordinates. Algorithms to manage these data are needed on platforms…
Energy-selective confinement of fusion-born alpha particles during internal relaxations in a tokamak plasma
Andreas Bierwage, Kouji Shinohara, Yevgen Kazakov +9
Long-pulse operation of a self-sustained fusion reactor using toroidal magnetic containment requires control over the content of alpha particles produced by D-T fusion reactions. O…
Towards enhanced performance in fusion plasmas via turbulence suppression by MeV ions
S. Mazzi, J. Garcia, D. Zarzoso +9
Megaelectron volt (MeV) alpha particles will be the main source of plasma heating in magnetic confinement fusion reactors. Yet, instead of heating fuel ions, most of the energy of…
New high-confinement regime with fast ions in the core of fusion plasmas
A. Di Siena, R. Bilato, T. Görler +12
The key result of the present work is the theoretical prediction and observation of the formation of a new type of transport barrier in fusion plasmas, called F-ATB (fast ion-induc…
Validating the ASCOT modelling of NBI fast ions in Wendelstein 7-X stellarator
S. Äkäslompolo, P. Drewelow, Y. Gao +37
The first fast ion experiments in Wendelstein 7-X were performed in 2018. They are one of the first steps in demonstrating the optimised fast ion confinement of the stellarator. Th…
Turbulent transport of MeV range cyclotron heated minorities as compared to alpha particles
István Pusztai, George J. Wilkie, Yevgen O. Kazakov +1
We study the turbulent transport of an ion cyclotron resonance heated (ICRH), MeV range minority ion species in tokamak plasmas. Such highly energetic minorities, which can be prod…
A new ICRF scenario for bulk ion heating in D-T plasmas: How to utilize intrinsic impurities in fusion devices in our favour
Y. O. Kazakov, J. Ongena, D. Van Eester +5
A fusion reactor requires plasma pre-heating before the rate of deuterium-tritium fusion reactions becomes significant. In ITER, radiofrequency (RF) heating of 3He ions, additional…
Tunneling and mode conversion of fast magnetosonic waves in the magnetospheres of Earth and Mercury
Yevgen O. Kazakov, Tünde Fülöp
Narrow-band linearly polarized waves, having a resonant structure and a peak frequency between the local cyclotron frequency of protons and heavy ions, have been detected in the ma…
Kinetic description of wave induced plasma flow in the radio frequency domain
Dirk Van Eester, Kristel Crombé, Yevgen Kazakov
A model for ICRH induced flows in the presence of a strong magnetic field is presented. These flows are the finite temperature counterpart of flows existing in cold plasmas describ…
Impurity transport in Alcator C-Mod in the presence of poloidal density variation induced by ion cyclotron resonance heating
Albert Mollén, István Pusztai, Matthew L. Reinke +5
Impurity particle transport in an ion cyclotron resonance heated Alcator C-Mod discharge is studied with local gyrokinetic simulations and a theoretical model including the effect…
Radio frequency induced and neoclassical asymmetries and their effects on turbulent impurity transport in a tokamak
István Pusztai, Matt Landreman, Albert Mollén +2
Poloidal asymmetries in the impurity density can be generated by radio frequency heating in the core and by neoclassical effects in the edge of tokamak plasmas. In a pedestal case…
Effect of impurities on the transition between minority ion and mode conversion ICRH heating in (3He)-H tokamak plasmas
Ye. O. Kazakov, T. Fülöp, D. Van Eester
Hydrogen majority plasmas will be used in the initial non-activated phase of ITER operation. Optimizing ion cyclotron resonance heating (ICRH) in such scenarios will help in achiev…