Marginal beta-limit for neoclassical tearing modes in JET H-mode discharges

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The recently developed van der Waals magnets provide a promising platform for spintronics and magnonics. Here, we report the observation of surface magnon propagation in the van der Waals antiferromagnet CrSBr. We find a nearly unidirectional propagation of antiferromagnetic magnon modes, which emerge near the anticrossing of the optical and acoustic magnon bands, in agreement with our theory of magnetostatic waves in antiferromagnets. The propagation direction can be reversed by switching the magnetic fiel

Advanced tokamak regimes, featuring extended regions of low magnetic shear, are promising candidates for future fusion reactors (record breaking DT pulses at JET in hybrid mode) but are also more prone to specific MHD instabilities. The proximity to a rational surface in a very low shear region weakens field line bending stabilisation and amplifies the effects of toroidal coupling between modes, leading to the emergence of long-wavelength ideal or resistive infernal modes. These modes can grow collectively

This work presents numerical and analytic approaches for calculating the amplitude of edge harmonic oscillations (EHOs) associated with Quiescent H-modes in the presence of symmetry breaking magnetic coils. The analytic approach uses a linear ideal MHD model for EHOs and external kink modes subject to a given boundary condition defined by an externally applied helical field. The imposed 3D field is found to extend the parameter space of unstable external kink modes and EHOs, also providing an amplitude for

This letter reports on the first direct velocity-space resolved measurements of runaway electrons (REs) losses in magnetically confined plasmas using a unique Fast Particle Loss Detector (FPLD) installed on the magnetic confinement fusion device Tokamak & agrave; Configuration Variable. Clear signatures of REs are identified via multiple distinct regions of emission appearing on the FPLD scintillator-coated plate in plasma discharges that contain no fast ions but are characterised by significant RE populati

We present the results of 3D, flux-driven, global, two-fluid electrostatic turbulence simulations in a 5-field period stellarator with an island divertor. The numerical simulations are carried out with the GBS code, which solves the two-fluid drift-reduced Braginskii equations and has been extended recently to simulate plasma turbulence in non-axisymmetric magnetic equilibria. The vacuum magnetic field used in the simulations is carefully constructed using Dommaschk potentials in order to describe a configu

For the first time, a rigorous definition of the magnetic presheath entrance (MPSE) is provided, as the location where the drift-reduced approximation breaks down. We consider a weakly collisional electrostatic plasma with cold ions in contact with an absorbing wall in the presence of ExB drifts. We provide expressions at the MPSE for the parallel ion and electron velocities, the gradients of plasma density and potential, and the vorticity. In particular, we show that the plasma potential with respect to th

In this paper we deal with the multi-object tracking problem in the particular case of pedestrians, assuming the detection step already done. We use a Bayesian framework to combine the likelihood term provided by an image correlation algorithm with a prior distribution given by a discrete choice model for pedestrian behavior, calibrated on real data. We aim to show how the combination of the image information with a model of pedestrian behavior can provide appreciable results in real and complex scenarios.

One view of the high-transition-temperature (high-T-c) copper oxide superconductors is that they are conventional superconductors where the pairing occurs between weakly interacting quasi-particles (corresponding to the electrons in ordinary metals), although the theory has to be pushed to its limit(1). An alternative view is that the electrons organize into collective textures (for example, charge and spin stripes) which cannot be 'mapped' onto the electrons in ordinary metals. Understanding the properties

We report on X-ray photoemission of core levels, valence band studies using angle-integrated photoemission, and magnetization measurements of ruthenocuprate and SrRuO3 polycrystalline samples. The data indicate that the RuO2 planes are the source of the energetics of the magnetic ordering. We also find that adding hydrogen leads to changes in the many-body response on both the CuO2 and EuO planes.

We present measurements for the resistivity of

c' axis oriented YBa2Cu3O7-δ (YBCO) films grown on (100) SrTiO3 substrates by both laser ablation and ion beam sputtering. The effect of the magnetic field on the resistivity is investigated with the field parallel to the

c' axis. The zero field transition widths vary from 1 K to 4 K in different films. However the data exhibits 3d X-Y critical scaling having introduced an `effective' magnetic field characteristic of the length scale of the disorder in the f

Marginal beta-limit for neoclassical tearing modes in JET H-mode discharges

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Surface Magnon Propagation in a van der Waals Antiferromagnet

Core MHD instabilities and their spectra in advanced tokamak regimes: ideal and resistive physics

Extending the Space of Edge Harmonic Oscillations by Magnetic Symmetry Breaking External Coils in Tokamaks

First Velocity-space Resolved Measurements of Relativistic Electron Losses in a Magnetically Confined Plasma

First global simulations of plasma turbulence in a stellarator with an island divertor

Boundary conditions for plasma fluid models at the magnetic presheath entrance

Bayesian Integration of a Discrete Choice Pedestrian Behavioral Model and Image Correlation Techniques for Automatic Multi Object Tracking

Antiferromagnetic order induced by an applied magnetic field in a high-temperature superconductor

Electronic and magnetic properties of ruthenocuprates

3d X-Y scaling of the resistivity and the effect of disorder in YBa2Cu3O7-δ thin films