Results 11 to 20 of about 99 (69)

Search for Very-High-β MHD Stable Quasi-Isodynamic Configurations

Plasma and Fusion Research, 2008
Quasi-isodynamic configurations offer the possibility of very good energetic particle confinement. They seem to offer the possibility of achieving very high plasma β, too.
Bovshuk, V.R., Cooper, W.A., Mikhailov, M.I., Nuehrenberg, J., Shafranov, V.D.   +4 more
exaly   +4 more sources

Combination of quasi-isodynamic and piecewise omnigenous magnetic fields

Nuclear Fusion
Due to their simultaneous optimization for radial and parallel neoclassical transport, quasi-isodynamic (QI) fields have been the main choice of stellarator magnetic configuration for most fusion reactor candidates in recent years.
J.L. Velasco, I. Calvo, V. Fernández-Pacheco, H. Liu, M. Padidar, E. Sánchez, G. Yu, C. Zhu   +7 more
doaj   +3 more sources

Evaluation of neoclassical transport in nearly quasi-isodynamic stellarator magnetic fields using MONKES

Nuclear Fusion
Stellarator magnetic fields that are perfectly optimized for neoclassical transport (with levels of radial neoclassical transport comparable to tokamaks) are called omnigenous.
F.J. Escoto, J.L. Velasco, I. Calvo, E. Sánchez   +3 more
doaj   +2 more sources

Reply to the comment on ‘Bootstrap current and neoclassical transport in quasi-isodynamic stellarators’ [PDF]

Plasma Physics and Controlled Fusion, 2011
Helander, P., Nührenberg, J.
exaly   +4 more sources

Suppression of non-axisymmetric field-induced α-particle loss channels in a quasi-axisymmetric stellarator

AIP Advances, 2022
In future fusion reactors, the confinement of α-particles is a crucial issue. The perfect omnigenity may be difficult to achieve in the quasi-isodynamic and quasi-symmetric stellarators when a multi-objective optimization is considered.
Yichao Zhang, Haifeng Liu, Jie Huang, Yuhong Xu, Jian Zhang, Akihiro Shimizu, Shinsuke Satake, Mitsutaka Isobe, Xianqu Wang, Jun Cheng, Hai Liu, Xin Zhang, Changjian Tang   +12 more
doaj   +1 more source

Robust stellarator optimization via flat mirror magnetic fields

Nuclear Fusion, 2023
Stellarator magnetic configurations need to be optimized in order to meet all the required properties of a fusion reactor. In this work, it is shown that a flat-mirror quasi-isodynamic (QI) configuration (i.e.
J.L. Velasco, I. Calvo, E. Sánchez, F.I. Parra   +3 more
doaj   +1 more source

Helicity of the magnetic axes of quasi-isodynamic stellarators

Journal of Plasma Physics, 2023
In this study, we explore the influence of the helicity of the magnetic axis – defined as the self-linking number of the curve – on the quality of quasi-isodynamic stellarator-symmetric configurations constructed using the near-axis expansion method (Plunk et al., J. Plasma Phys., vol. 85, 2019, 905850602; Camacho Mata et al., J. Plasma Phys., vol. 88,
Camacho Mata, Katia, Plunk, Gabriel G.
openaire   +3 more sources

A single-field-period quasi-isodynamic stellarator

Journal of Plasma Physics, 2022
A single-field-period quasi-isodynamic stellarator configuration is presented. This configuration, which resembles a twisted strip, is obtained by the method of direct construction, that is, it is found via an expansion in the distance from the magnetic axis.
Jorge, R., Plunk, G.G., Drevlak, M., Landreman, M., Lobsien, J.-F., Camacho Mata, K., Helander, P.   +6 more
openaire   +3 more sources

The Magnetic Beneficiation of Coal

Physical Separation in Science and Engineering, Volume 2, Issue 1, Page 1-48, 1985., 1985
The magnetic demineralization of coal can produce a fuel containing lower leveIs of sulphur and ash forming minerals. The ability of the magnetic separation technique to process material over a wide range of particle sizes (I‐1000 µm) and to operate on either liquid or gaseous feed enables a number of possible coal processing applications.
S. E. Male
wiley   +1 more source

The maximum-J property in quasi-isodynamic stellarators

Journal of Plasma Physics
Some stellarators tend to benefit from favourable average magnetic curvature for trapped particles when the plasma pressure is sufficiently high. This so-called maximum- $J$ property has several positive implications, such as good fast-particle confinement, magnetohydrodynamic stability and suppression of certain trapped ...
Rodríguez, E., Helander, P., Goodman, A.G.   +2 more
openaire   +3 more sources