Results 21 to 30 of about 1,577 (223)

Low n electromagnetic modes in spherical tokamaks

Plasma Physics and Controlled Fusion, 2021
Abstract The performance of spherical tokamak reactors depends on plasma β, and an upper limit is set by long-wavelength kinetic ballooning modes (KBMs). We examine how these modes become unstable in spherical-tokamak reactor relevant plasmas, which may contain significant fast-ion pressure.
J Chowdhury, B F McMillan
openaire   +1 more source

Divertor optimisation and power handling in spherical tokamak reactors

Nuclear Materials and Energy, 2023
A key aspect in the design of a spherical tokamak reactor is the optimisation of the plasma equilibrium, together with a compatible divertor configuration, and the corresponding poloidal field system.
A. Hudoba, S. Newton, G. Voss, G. Cunningham, S. Henderson   +4 more
doaj   +1 more source

Control of resistive wall modes in the spherical tokamak

Nuclear Fusion, 2023
In this work, the MARS-F/K codes (Liu et al 2000 Phys. Plasmas 7 3681; Liu et al 2008 Phys. Plasmas 15 112503) are utilized to model the passive and active control of the n = 1 ( n is the toroidal mode number) resistive wall mode (RWM) in a spherical ...
Guoliang Xia, Yueqiang Liu, T.C. Hender, K.G. McClements, E. Trier, E. Tholerus   +5 more
doaj   +1 more source

Adhesion force of W dust on tokamak W plasma-facing surfaces: The importance of the impact velocity

Nuclear Materials and Energy, 2019
The adhesion of tungsten (W) dust particles on W tokamak plasma-facing surfaces is investigated. When spherical dust hits the tokamak walls, its shape is altered as a contact area is created by the adhesion work and irreversible plastic deformation.
A. Autricque, F. Gensdarmes, S. Peillon, M. Sow, C. Grisolia   +4 more
doaj   +1 more source

Neutral Beam Coupling with Plasma in a Compact Fusion Neutron Source

Applied Sciences, 2022
FNS-ST is a fusion neutron source project based on a spherical tokamak (R/a = 0.5 m/0.3 m) with a steady-state neutron generation of ~1018 n/s. Neutral beam injection (NBI) is supposed to maintain steady-state operation, non-inductive current drive and ...
Eugenia Dlougach, Alexander Panasenkov, Boris Kuteev, Arkady Serikov   +3 more
doaj   +1 more source

Heating by an Electron Bernstein Wave in a Spherical Tokamak Plasma via Mode Conversion [PDF]

, 2006
The first successful high power heating of a high dielectric constant spherical tokamak plasma by an electron Bernstein wave (EBW) is reported. An EBW was excited by mode conversion (MC) of an X mode cyclotron wave injected from the low magnetic field ...
Sakamoto, Mizuki, Nozato, Hideaki, Hanada, Kazuaki, Nakamura, Kazuo, Sato, Kohnosuke, Takase, Yuichi, Hasegawa, Makoto, Idei, Hiroshi, Mitarai, Osamu, Nishino, Nobuhiro, Sasaki, Keisuke, Yamada, Takuma, Zushi, Hideki, Shiraiwa, Syunichi, Kasahara, Hiroshi   +14 more
core   +1 more source

Energy confinement scaling in the NCST spherical tokamak [PDF]

AIP Advances
Energy confinement time τE and its scaling law in the NanChang Spherical Tokamak (NCST) are investigated based on experimental data from NCST campaigns, with a focus on their dependence on plasma current (IP), toroidal magnetic field (BT), and electron ...
Y. Chen, X. C. Chen, X. F. Wu, S. Q. Liu
doaj   +1 more source

Advanced tokamak reactors based on the spherical torus (ATR/ST). Preliminary design considerations [PDF]

, 1986
Preliminary design results relating to an advanced magnetic fusion reactor concept based on the high-beta, low-aspect-ratio, spherical-torus tokamak are summarized.
Miller, R. L., Seed, T. J., Copenhaver, C., Engelhardt, A. G., Bathke, C. G., Krakowski, R. A., Zubrin, R. M., Schnurr, N. M.   +7 more
core   +1 more source

Fluctuating Interfaces in Barotropic Beta‐Plane Turbulence

Geophysical Research Letters, Volume 53, Issue 9, 16 May 2026.
Abstract Zonal jets manifest themselves as bands with sharp interfaces in the vorticity configuration. We develop an algorithm to track these fluctuating vorticity interfaces and systematically investigate their characteristic spatio‐temporal behaviors.
Sandip Sahoo, Samriddhi Sankar Ray
wiley   +1 more source

The optimisation of the STEP electron cyclotron current drive concept

Nuclear Fusion
A fusion reactor based on the spherical tokamak is very likely to be completely non-inductive for the majority of the plasma ramp-up and steady-state phases, due to the limitations imposed on the central coil assemblies by the compact design.
Simon Freethy, Lorenzo Figini, Steven Craig, Mark Henderson, Ridhima Sharma, Thomas Wilson, the STEP team   +6 more
doaj   +1 more source