Results 1 to 10 of about 190,947 (267)

Interactions of fast ions with graphene [PDF]

Hemijska Industrija, 2009
In this work, we study the interactions of fast ions with graphene describing the excitations of the electron gas in graphene by a two-dimensional (2D) hydrodynamic model (one-fluid and two-fluid model).
Radović Ivan S., Hadžievski Ljupčo R., Bibić Nataša M., Mišković Zoran L.   +3 more
doaj   +3 more sources

Energetic particle optimization of quasi-axisymmetric stellarator equilibria

Nuclear Fusion, 2022
An important goal of stellarator optimization is to achieve good confinement of energetic particles such as, in the case of a reactor, alphas created by deuterium–tritium fusion. In this work, a fixed-boundary stellarator equilibrium was re-optimized for
Alexandra LeViness, John C. Schmitt, Samuel A. Lazerson, Aaron Bader, Benjamin J. Faber, Kenneth C. Hammond, David A. Gates   +6 more
doaj   +1 more source

A linear parameters study of ion cyclotron emission using drift ring beam distribution

Nuclear Fusion, 2023
Ion Cyclotron Emission (ICE) holds great potential as a diagnostic tool for fast ions in fusion devices. The theory of Magnetoacoustic Cyclotron Instability (MCI), as an emission mechanism for ICE, states that MCI is driven by a velocity distribution of ...
Haozhe Kong, Huasheng Xie, Jizhong Sun
doaj   +1 more source

Study of fast-ion-driven toroidal Alfvén eigenmodes impacting on the global confinement in TCV L-mode plasmas

Frontiers in Physics, 2023
Following recent observations of unstable Toroidal Alfvén Eigenmodes (TAEs) in a counter-current Neutral Beam Injection (NBI) scenario developed in TCV, an in-depth analysis of the impact of such modes on the global confinement and performance is carried
S. Mazzi, S. Mazzi, M. Vallar, U. Kumar, O. Krutkin, J. Poley-Sanjuan, L. Simons, J. Ball, S. Brunner, S. Coda, J. Garcia, A. Iantchenko, Ye. O. Kazakov, W. H. Lin, J. Ongena, B. Rofman, L. Villard, the TCV team   +17 more
doaj   +1 more source

Gyro orbit simulations of neutral beam injection in Wendelstein 7-X

Nuclear Fusion, 2023
Simulations exploring neutral beam operation in Wendelstein 7-X (W7-X) at reduced magnetic field are performed using a newly implemented gyro orbit model in the BEAMS3D code.
Samuel A. Lazerson, David Kulla, Dirk A. Hartmann, Paul McNeely, Norbert Rust, the W7-X Team   +5 more
doaj   +1 more source

Experiments in high-performance JET plasmas in preparation of second harmonic ICRF heating of tritium in ITER

Nuclear Fusion, 2023
The reference ion cyclotron resonance frequency (ICRF) heating schemes for ITER deuterium–tritium (D-T) plasmas at the full magnetic field of 5.3 T are second harmonic heating of T and ^3 He minority heating.
M.J. Mantsinen, P. Jacquet, E. Lerche, D. Gallart, K. Kirov, P. Mantica, D. Taylor, D. Van Eester, M. Baruzzo, I. Carvalho, C.D. Challis, A. Dal Molin, E. Delabie, E. De La Luna, R. Dumont, P. Dumortier, J. Eriksson, D. Frigione, J. Garcia, L. Garzotti, C. Giroud, R. Henriques, J. Hobirk, A. Kappatou, Y. Kazakov, D. Keeling, D. King, V. Kiptily, M. Lennholm, P. Lomas, C. Lowry, C.F. Maggi, J. Mailloux, M. Maslov, S. Menmuir, I. Monakhov, R.B. Morales, C. Noble, M. Nocente, A. Patel, G. Pucella, C. Reux, D. Rigamonti, F. Rimini, A. Sheikh, S. Silburn, P. Siren, E.R. Solano, Z. Stancar, M. Tardocchi, JET Contributors   +50 more
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Neutral Beams for Neutron Generation in Fusion Neutron Sources

Atoms, 2022
Neutral beam injection is supposed to be the main source of high-energy particles, driving non-inductive current and generating primary neutrons in fusion neutron sources design based on tokamaks.
Eugenia Dlougach, Mikhail Shlenskii, Boris Kuteev   +2 more
doaj   +1 more source

Gyrokinetic turbulence modeling of a high performance scenario in JT-60SA

Nuclear Fusion, 2023
Local gyrokinetic simulations are used to model turbulent transport for the first time in a representative high-performance plasma discharge projected for the new JT-60SA tokamak. The discharge features a double-null separatrix, 41 MW of combined neutral
A. Iantchenko, M.J. Pueschel, S. Brunner, S. Coda   +3 more
doaj   +1 more source

Fast separation of two trapped ions

New Journal of Physics, 2015
We design fast protocols to separate or recombine two ions in a segmented Paul trap. By inverse engineering the time evolution of the trapping potential composed of a harmonic and a quartic term, it is possible to perform these processes in a few ...
M Palmero, S Martínez-Garaot, U G Poschinger, A Ruschhaupt, J G Muga   +4 more
doaj   +1 more source

Influence of sawtooth oscillations on fast ions in a stellarator

Nuclear Fusion
Sawtooth oscillations in tokamaks frequently lead to the redistribution of energetic ions, mainly on passing orbits, causing their expulsion from the core.
D. Moseev, M. Zanini, H. Kasahara, H.P. Laqua, H. Funaba, W.H.J. Hayashi, W. Heidbrink, K. Ida, H. Igami, Y. Kawamoto, N. Kenmochi, S.A. Lazerson, M. Nishiura, R. Ochoukov, K. Ogawa, M. Rud, M. Salewski, T. Seki, N. Tamura, K. Tanaka, T. Tokuzawa, M. Yoshinuma   +21 more
doaj   +1 more source