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 +4 more
doaj +3 more sources
Towards a compact spherical tokamak fusion pilot plant. [PDF]
Philos Trans A Math Phys Eng Sci, 2019 Costley AE.
europepmc +2 more sources
Breakdown of adiabatic invariance in spherical tokamaks [PDF]
, 2001 Thermal ions in spherical tokamaks have two adiabatic invariants: the magnetic moment and the longitudinal invariant. For hot ions, variations in magnetic-field strength over a gyro period can become sufficiently large to cause breakdown of the adiabatic
Alfvén H. +4 more
core +2 more sources
Gyrokinetic simulations of spherical tokamaks [PDF]
Plasma Physics and Controlled Fusion, 2009 This paper reviews transport and confinement in spherical tokamaks (STs) and our current physics understanding of this that is partly based on gyrokinetic simulations. Equilibrium flow shear plays an important role, and we show how this is consistently included in the gyrokinetic framework for flows that greatly exceed the diamagnetic velocity. The key
Roach, C +23 more
openaire +2 more sources
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
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Studies of various lower hybrid wave launch scenarios for non-inductive start-up on TST-2 [PDF]
EPJ Web of ConferencesEfficient non-inductive start-up of a spherical tokamak may be achieved by using lower hybrid waves that have high current drive efficiency. On the TST-2 spherical tokamak, three lower hybrid launchers are installed at the outer-midplane, top and outer ...
Tsujii Naoto +11 more
doaj +1 more source
HRXRD study of the theoretical densities of novel reactive sintered boride candidate neutron shielding materials [PDF]
, 2020 Reactive Sintered Borides (RSBs) are novel borocarbide materials derived from FeCr-based cemented tungsten (FeCr-cWCs) show considerable promise as compact radiation armour for proposed spherical tokamak,[1],[2],[3],[4],[5].
Marshall, Jessica M. +2 more
core +1 more source
Numerical Studies and Simulation of the Lower Hybrid Waves Current Drive by using Fokker – Planck Equation in NSST and HT-7 Tokamaks [PDF]
Journal of Sciences, Islamic Republic of Iran, 2014 Recent experiments on the spherical tokamak have discovered the conditions to create a powerful plasma and ensure easy shaping and amplification of stability, high bootstrap current and confinement energy.
A.A. Molavi Choobini
doaj
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 +5 more
doaj +1 more source
Formation of convective cells in the scrape-off layer of the CASTOR tokamak [PDF]
, 2004 Understanding of the scrape-off layer (SOL) physics in tokamaks requires diagnostics with sufficient temporal and spatial resolution. This contribution describes results of experiments performed in the SOL of the CASTOR tokamak (R=40 cm, a = 6 cm) by ...
Counsell G F Cohen R H Hellander P Ryutov D D the MAST team +20 more
core +3 more sources