Results 31 to 40 of about 10,224 (240)
Collisionless microinstabilities in stellarators II - numerical simulations [PDF]
, 2013 Microinstabilities exhibit a rich variety of behavior in stellarators due to the many degrees of freedom in the magnetic geometry. It has recently been found that certain stellarators (quasi-isodynamic ones with maximum-$J$ geometry) are partly resilient
Helander, P. +2 more
core +1 more source
Contribution to fusion research from IAEA coordinated research projects and joint experiments [PDF]
, 2015 The paper presents objectives and activities of IAEA Coordinated Research Projects 'Conceptual development of steady-state compact fusion neutron sources' and 'Utilisation of a network of small magnetic confinement fusion devices for mainstream fusion ...
A. Melnikov +8 more
core +2 more sources
Fusion Science and Technology, 2004 Stellarators are toroidal devices where the required rotational transform of the magnetic field lines is generated by external field coils and not via an induced net toroidal plasma current. This confinement scheme has the advantages that, in principle, steady-state plasma operation is possible and that it does not have to brace itself against ...
openaire +6 more sources
Properties of a new quasi-axisymmetric configuration [PDF]
, 2018 A novel, compact, quasi-axisymmetric configuration is presented which exhibits low fast-particle losses and is stable to ideal MHD instabilities. The design has fast-particle loss rates below 8\% for flux surfaces within the half-radius, and is shown to ...
Beidler, C. D. +6 more
core +2 more sources
, 2020 We study the effect of turbulent transport in different magnetic configurations of the Weldenstein 7-X stellarator. In particular, we performed direct numerical simulations with the global gyrokinetic code GENE-3D, modeling the behavior of Ion ...
Di Siena, A. +9 more
core +1 more source
Comparison of particle trajectories and collision operators for collisional transport in nonaxisymmetric plasmas [PDF]
, 2014 In this work, we examine the validity of several common simplifying assumptions used in numerical neoclassical calculations for nonaxisymmetric plasmas, both by using a new continuum drift-kinetic code and by considering analytic properties of the ...
A. Mollén +10 more
core +2 more sources
Coarse-grained gyrokinetics for the critical ion temperature gradient in stellarators
Physical Review Research, 2022 We present a modified gyrokinetic theory to predict the critical gradient that determines the linear onset of the ion temperature gradient (ITG) mode in stellarator plasmas.
G. T. Roberg-Clark +2 more
doaj +1 more source
Nuclear Materials and Energy, 2022 The utilization of metal additively manufactured radial plates and conductors for high-field modular-stellarator coils is assessed, particularly, for resistive coils having turns of variable cross-section (additively manufactured aluminium or copper ...
V. Queral +3 more
doaj +1 more source
A general comparison between tokamak and stellarator plasmas
Matter and Radiation at Extremes, 2016 This paper generally compares the essential features between tokamaks and stellarators, based on previous review work individually made by authors on several specific topics, such as theories, bulk plasma transport and edge divertor physics, along with ...
Yuhong Xu
doaj +1 more source
New Journal of Physics, 2022 Microwave heating of over-dense plasmas is routinely achieved in the stellarator TJ-K. In contrast to usually applied heating scenarios in tokamaks or stellarators, an operational regime is described where the heating occurs well below the electron ...
A Köhn-Seemann +7 more
doaj +1 more source