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The properties of resistive MHD modes and unstable spectra in advanced tokamak regimes
arXivAbstract Advanced tokamak regimes, featuring extended regions of low magnetic shear, are promising candidates for future fusion reactors but are also more prone to specific kinds of MHD instabilities. The proximity to a rational surface in a very low shear…
Gas puff imaging of plasma turbulence in the magnetic island scrape-off layer of W7-X
Nuclear Materials and Energy• Gas puff imaging of plasma turbulence in the magnetic island scrape-off layer on W7-X. • Observation of a radial profile of sheared poloidal flows and its relationships to the connection length profile. • Negligible level of radial transport in the confin…
Investigation of a gallium alloy liquid metal mirror for application in inertial fusion energy systems
Optical Materials ExpressThe final optic in future inertial fusion energy plants must maintain high performance and survivability under gigashot laser irradiation while exposed to fusion byproducts. Although no practical solution has been demonstrated, a self-healing final turning…
The high-field tokamak physics basis for the ARC fusion power plant
Journal of Plasma PhysicsAn abstract is not available for this content. As you have access to this content, full HTML content is provided on this page. A PDF of this content is also available in through the ‘Save PDF’ action button.
Localized 3D control of energetic electron-driven toroidal Alfven eigenmode using resonant magnetic perturbations in the EAST tokamak
Nuclear FusionAbstract The formation of a static 3D helically localized perturbation structure of the toroidal Alfvén eigenmode (TAE) is observed for the first time under static magnetic islands induced by resonant magnetic perturbations (RMPs) in tokamak plasmas. Before…
Testing tungsten plasma facing components in WEST and AUG tokamaks
Nuclear FusionAbstract Next step fusion devices will face unprecedented heat loads and particle fluence with thousands of hours of plasma exposure on plasma-facing components (PFCs) cumulated over the entire lifetime of the device. These components must guarantee an acce…
Accuracy assessment of the calorimetric system for measurement of ITER’s fusion energy output
Nuclear FusionAbstract The calorimetric system of ITER is designed to measure the time-integrated fusion power output of the tokamak by analysing thermal flows and calculating the energy balance. While too slow for real-time control, its high accuracy is essential for cr…
A quasi-isodynamic stellarator configuration towards a fusion power plant
Journal of Plasma PhysicsThis work demonstrates that magnetohydrodynamic (MHD) stable, quasi-isodynamic (QI) stellarator equilibria with reduced turbulence can be generated with an optimised coilset. We present one such equilibrium which, when being generated by coils, maintains th…
Health Physics Aspects of an Inertial Confinement Fusion Power Facility
QeiosRecent advances at the National Ignition Facility resulted in the achievement of fusion ignition using inertial confinement. This milestone event provided positive evidence for the potential viability of an inertial confinement power facility. Although thes…
The physics of ELM-free regimes in EUROfusion tokamaks
arXiv (Cornell University)The development of operational scenarios without large Type-I ELMs is of utmost importance for the stable operation and longevity of future tokamaks. The EUROfusion tokamak exploitation program has therefore made the understanding of ELM-free regimes a majo…
On the drive of n_φ = 0 modes by ICRF accelerated ions in a tokamak
Nuclear FusionAbstract Energetic ions have the potential to drive instabilities with toroidal mode number of n_φ = 0 in tokamak fusion plasmas. A necessary condition is that their distribution function is either anisotropic or exhibits a region of phase space with a posi…
A machine learning case study in nuclear fusion: Assessment of the absolute deuterium-tritium fusion power of ITER with gamma-ray spectroscopy
Energy and AINuclear fusion holds great potential as a carbon-neutral means of electricity production. However, technical aspects of its implementation remain challenging. The real-time measurement of the fusion power released during Deuterium-Tritium (DT) fusion is one…
Effect of CT fuel deposition on the plasma density profile in the HL-3 tokamak
Plasma Physics and Controlled FusionAbstract Direct fuelling of the core region of a tokamak by compact torus (CT) injection plays a crucial role for fuelling and burning efficiency in a fusion reactor. However, the penetration and deposition processes of CT in fusion devices involve complex…
Preliminary engineering design of the first wall and X-point divertor of the Helios planar coil stellarator
Fusion Engineering and Design“Helios” is a two-field-period, quasi-axisymmetric (“QA”) planar coil stellarator power plant that features a novel, toroidally-continuous, non-resonant X-point divertor isomorphic to that of a tokamak with resonant magnetic perturbations. This work describ…
Design of high-gain laser fusion with heatwave-driven fast ignition scheme for inertial fusion energy
Nuclear FusionAbstract We design a high-gain laser fusion employing a fast ignition scheme for inertial fusion energy with a total laser energy less than 1 megajoule. A solid-sphere target which is robust to hydro instabilities is utilized instead of a fragile shell targ…
Milestone in predicting core plasma turbulence: successful multi-channel validation of the gyrokinetic code GENE
Nature CommunicationsOn the basis of several recent breakthroughs in fusion research, many activities have been launched around the world to develop fusion power plants on the fastest possible time scale. In this context, high-fidelity simulations of the plasma behavior on larg…
On the Possible Role of Parametric Decay Instabilities in Experiments on Electron Cyclotron Heating of the Plasma with the Extraordinary Wave at the Second Resonance Harmonic at the TEXTOR Tokamak
Plasma Physics ReportsAbstract Experimental results of electron cyclotron (EC) resonance plasma heating using an extraordinary wave at the TEXTOR tokamak are presented, which indicate that in the EC region, no more than one third of the microwave power launched into the plasma i…
An analytical criterion for significant runaway electron generation in activated tokamaks
arXivA disrupting plasma in a high-performance tokamak such as ITER or SPARC may generate large runaway electron currents that, upon impact with the tokamak wall, can cause serious damage to the device. To quickly identify regions of safe operation in parameter…
Numerical simulation of tokamak plasma equilibrium evolution
Journal of Computational PhysicsThis paper focuses on the numerical methods recently developed in order to simulate the time evolution of a tokamak plasma equilibrium at the resistive diffusion time scale. Starting from the method proposed by Heumann in 2021 for the coupling of magnetic e…
Investigating island divertor physics with an extended stellarator two-point model
Nuclear FusionAbstract The two-point model by Stangeby has been widely used to gain insight into the relevant transport processes in the tokamak scrape-off-layer (SOL). It has been adapted into a stellarator two-point model (STPM) by Feng to consider additional perpendic…
In the quest for the optimum solid-state laser amplifier medium for Inertial Fusion Energy
Communications MaterialsThe quest for an optimal solid-state laser amplifier medium for Inertial Fusion Energy has been investigated through a systematic analysis of more than a hundred optical materials, including glasses, single crystals and ceramics. This work emphasizes the in…
Time-dependent scenario modeling for the ST-E1 fusion power plant
Nuclear FusionAbstract ST-E1 is a low aspect ratio fusion power plant being designed by Tokamak Energy targeting 1.5 GW of fusion power. Characterization of the ST-E1 flat-top scenario is described elsewhere McNamara et al (2026 Nucl. Fusion 66 086008); here we focus on…
New interpretation of ion cyclotron emission from a tokamak
Physics of PlasmasThe tempting interpretation of ion cyclotron emission in terms of compressional Alfvén eigenmodes involving energetic ions is inconsistent with recent TCV experimental observations in some important aspects, such as (i) the perturbed poloidal field is excee…
Tritium Extraction from Liquid Blankets of Fusion Reactors via Membrane Gas–Liquid Contactors
Journal of Nuclear EngineeringThe exploitation of fusion energy in tokamak reactors relies on efficient and reliable tritium management. The tritium needed to sustain the deuterium–tritium fusion reaction is produced in the Li-based blanket surrounding the plasma chamber, and, therefore…