Results 81 to 90 of about 1,577 (223)

First Results of the Implementation of the Doppler Backscattering Diagnostic for the Investigation of the Transition to H-Mode in the Spherical Tokamak Globus-M2. [PDF]

Sensors (Basel), 2023
Ponomarenko A, Yashin A, Kurskiev G, Minaev V, Petrov A, Petrov Y, Sakharov N, Zhiltsov N.   +7 more
europepmc   +1 more source

Self-organization during spherical torus formation by flux rope merging in the Mega Ampere Spherical Tokamak

, 2014
Merging-compression start-up in the Mega Ampere Spherical Tokamak provides an opportunity to investigate the merging of flux ropes through magnetic reconnection, and the self-organization into a single flux rope, in a low-plasma-β, high-Lundquist-number ...
Browning, P K; id_orcid, McClements, K G, Stanier, A, Ashworth, G, Lukin, V S   +4 more
core   +1 more source

Spontaneous Formation of Spherical Tokamak by ECH on LATE [PDF]

, 2005
Spontaneous formation of spherical tokamak is observed during a microwave discharge at the electron cyclotron resonance (ECR) under a steady vertical magnetic field.
Matsumoto, Taisuke, Tanaka, Hitoshi, Uchida, Masaki, Hayashi, Kazunori, Yamaguchi, Soichiro, Maebara, Sunao, Maekawa, Takashi, Yamada, Jun, Abe, Yuichiro, Imai, Tsuyoshi, Yoshinaga, Tomokazu   +10 more
core   +1 more source

Heating and current drive in STEP: why neutral beam injection is not desirable

Nuclear Fusion
Spherical Tokamak for Energy Production (STEP) is the UK’s prototype fusion power plant programme aiming to demonstrate net electrical output from a spherical tokamak. The plasma scenarios require a completely non-inductive current drive for the flat-top
Thomas Wilson, Mark Henderson, Hana El-Haroun, Anurag Saigiridhari, Emmi Tholerus   +4 more
doaj   +1 more source

Breakdown of adiabatic invariance in spherical tokamaks [PDF]

Physics of Plasmas, 2001
Due to the weak but strongly varying magnetic field, fast ions in spherical tokamaks are susceptible to the breakdown of adiabatic invariance. Beam ions in present-day spherical tokamaks are typically marginally adiabatic or super-adiabatic. Super-adiabatic ions have energies in the intermediate range where the longitudinal invariant is still ...
openaire   +2 more sources

Nonlinear MHD Simulations of Spherical Tokamak and Helical Plasmas

, 2002
"Nonlinear magnetohydrodynamic (MHD) simulations on relaxation phenomena in a spherical tokamak and a helical plasma, including three-dimensional (3D) equilibrium computations, are executed in full toroidal geometries.
Miura, H., Mizuguchi, N., "Hayashi, T., Kanno, R., Okamoto, M.", Nakajima, N.   +5 more
core  

Microstability physics as illuminated in the spherical tokamak

Plasma Physics and Controlled Fusion, 2005
Spherical tokamaks (STs) have attractive features for fusion, and there is considerable interest in understanding their transport properties which depend on the underlying microinstabilities. STs are capable of operation with low magnetic fields and exhibit large inhomogeneity in the toroidal magnetic field.
Roach, C, Applegate, D, Connor, J, Cowley, S, Dorland, W, Hastie, R, Joiner, N, Saarelma, S, Schekochihin, A, Akers, R, Brickley, C, Field, A, Valovic, M, Team, MAST   +13 more
openaire   +1 more source

Optimising TGLF for a Q=10 Burning Spherical Tokamak [PDF]

, 2019
TGLF transport model predictions have been assessed in the vicinity of a theoretical high β burning plasma spherical tokamak at Q=10. Linear micro-stability calculations from TGLF have been compared on a surface at mid-radius with the gyrokinetic code ...
Wilson, Howard Read, Patel, Bhavin, Staebler, Gary, Dickinson, David, Koechl, F., Roach, Colin   +5 more
core  

Overview of recent results from the ST40 compact high-field spherical tokamak

Nuclear Fusion
ST40 is a compact, high-field ( $B_{\mathrm{T0}}\unicode{x2A7D} 2.1\,\,\,\textrm{T}$ ) spherical tokamak (ST) with a mission to expand the physics and technology basis for the ST route to commercial fusion.
S.A.M. McNamara, A. Alieva, M.S. Anastopoulos Tzanis, O. Asunta, J. Bland, H. Bohlin, P.F. Buxton, C. Colgan, A. Dnestrovskii, E. du Toit, M. Fontana, M. Gemmell, M.P. Gryaznevich, J. Hakosalo, M.R. Hardman, D. Harryman, D. Hoffman, M. Iliasova, S. Janhunen, F. Janky, J.B. Lister, H.F. Lowe, E. Maartensson, C. Marsden, S.Y. Medvedev, S.R. Mirfayzi, M. Moscheni, G. Naylor, V. Nemytov, J. Njau, T. O’Gorman, D. Osin, T. Pyragius, A. Rengle, M. Romanelli, C. Romero, M. Sertoli, V. Shevchenko, J. Sinha, A. Sladkomedova, S. Sridhar, J. Stirling, Y. Takase, P.R. Thomas, J. Varje, E. Vekshina, B. Vincent, H.V. Willett, J. Wood, E. Wooldridge, D. Zakhar, X. Zhang, D. Battaglia, N. Bertelli, P.J. Bonofiglo, L.F. Delgado-Aparicio, V.N. Duarte, N.N. Gorelenkov, M. de Haas, S.M. Kaye, R. Maingi, D. Mueller, M. Ono, M. Podesta, Y. Ren, S. Trieu, E. Delabie, T.K. Gray, B. Lomanowski, E.A. Unterberg, O. Marchuk, the ST40 Team   +71 more
doaj   +1 more source

The impact of E × B shear on microtearing based transport in spherical tokamaks

Nuclear Fusion
Electromagnetic microtearing modes (MTMs) have been observed in many different spherical tokamak (ST) regimes. Understanding how these and other electromagnetic modes nonlinearly saturate is likely critical in understanding the confinement of a high β ST.
B.S. Patel, M.R. Hardman, D. Kennedy, M. Giacomin, D. Dickinson, C.M. Roach   +5 more
doaj   +1 more source