Results 1 to 10 of about 3,492 (198)

“PROCESS”: Systems studies of spherical tokamaks [PDF]

Fusion Engineering and Design, 2020
With a reduced aspect ratio, spherical tokamaks have a number of attractive features for a fusion power plant. This can be studied using systems codes, which allow for the rapid conceptual study of power plants covering everything, from the plasma through to electricity generation. In this paper, we describe models in the systems code PROCESS that have
Muldrew, Stuart I., Lux, Hanni, Cunningham, Geof, Hender, Tim C., Kahn, Sebastien, Knight, Peter J., Patel, Bhavin, Voss, Garry M., Wilson, Howard R.   +8 more
openaire   +4 more sources

Microtearing modes in spherical and conventional tokamaks [PDF]

Nuclear Fusion, 2013
18 pages, 9 ...
Moradi, S., Pusztai, I., Guttenfelder, W., Fülöp, T., Mollén, A.   +4 more
openaire   +3 more sources

Breakdown of adiabatic invariance in spherical tokamaks [PDF]

Physics of Plasmas, 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., Arnold V. I., Johan Carlsson, Peng Y.-K. M., Peng Y.-K. M.   +4 more
core   +4 more sources

Shielding materials in the compact spherical tokamak. [PDF]

Philos Trans A Math Phys Eng Sci, 2019
Neutron shielding materials are a critical area of development for nuclear fusion technology. In the compact spherical tokamak, shielding efficiency improvements are particularly needed because of severe space constraints. The most spatially restricted component is the central column shield.
Humphry-Baker SA, Smith GDW.
europepmc   +6 more sources

Review of the NPA Diagnostic Application at Globus-M/M2

Atoms, 2023
The application of a neutral particle analyzer (NPA) diagnostic at the Globus-M/M2 spherical tokamaks is discussed. Physical principles of the diagnostic are reviewed. Two general approaches—active and passive measurements—are described.
Nikolai N. Bakharev, Andrey D. Melnik, Fedor V. Chernyshev   +2 more
doaj   +1 more source

Nonlinear degradation of O-X-B mode conversion in MAST Upgrade [PDF]

EPJ Web of Conferences, 2023
Spherical tokamaks like the MAST Upgrade device are often operated in an overdense regime. As a consequence, conventional electron cyclotron resonance heating (ECRH) and current drive (ECCD) are typically not possible.
Senstius Mads Givskov, Freethy Simon James, Nielsen Stefan Kragh   +2 more
doaj   +1 more source

Simulation of collision of dust nanoparticles with graphite wall using LAMMPS code [PDF]

مجله علوم و فنون هسته‌ای, 2021
In the present work, we have simulated the collision of dust nanoparticles with graphite wall using LAMMPS code, based on the molecular dynamics method.
M. Bakhtiyari Ramezani, M. Abdollahi Dargah, N. Abdollahi Ghahi   +2 more
doaj   +1 more source

Excitation of toroidally localized harmonics of global Alfvén eigenmodes

Nuclear Fusion, 2023
The spherical tokamak NSTX and the upgraded, higher toroidal field, NSTX-U, routinely create plasmas with large un-thermalized populations of super-Alfvénic fast ions.
E.D. Fredrickson
doaj   +1 more source

Application of linear electron Bernstein current drive models in reactor-relevant spherical tokamaks

Nuclear Fusion, 2023
Electron Bernstein current drive (EBCD) systems in spherical tokamaks are sensitive to plasma and launch conditions, and therefore require large parametric scans to optimise their design.
Bodhi Biswas, David Speirs, Simon Freethy, Roddy Vann   +3 more
doaj   +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