Results 1 to 10 of about 798,983 (300)
Controlling fast transport of cold trapped ions [PDF]
Physical Review Letters, 2012 We realize fast transport of ions in a segmented micro-structured Paul trap. The ion is shuttled over a distance of more than 10^4 times its groundstate wavefunction size during only 5 motional cycles of the trap (280 micro meter in 3.6 micro seconds ...
A. Steane +12 more
core +3 more sources
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. +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 +6 more
doaj +1 more source
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 +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 +3 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
Trapped ion scaling with pulsed fast gates [PDF]
, 2015 Fast entangling gates for trapped ions offer vastly improved gate operation times relative to implemented gates, as well as approaches to trap scaling. Gates on neighbouring ions only involve local ions when performed sufficiently fast, and we find that ...
Bentley, C. D. B. +2 more
core +2 more sources
Fast-ion Dα measurements of the fast-ion distribution (invited) [PDF]
Review of Scientific Instruments, 2010 The fast-ion Dα (FIDA) diagnostic is an application of charge-exchange recombination spectroscopy. Fast ions that neutralize in an injected neutral beam emit Balmer-α light with a large Doppler shift. The spectral shift is exploited to distinguish the FIDA emission from other bright sources of Dα light.
openaire +4 more sources
Nonlinear stabilization of tokamak microturbulence by fast ions [PDF]
, 2013 Nonlinear electromagnetic stabilization by suprathermal pressure gradients found in specific regimes is shown to be a key factor in reducing tokamak microturbulence, augmenting significantly the thermal pressure electromagnetic stabilization.
Bourdelle, C. +10 more
core +3 more sources
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 +17 more
doaj +1 more source