40 citations · 178 across the 9 of their papers we have counts for
9 papers · 1 filter
Zonally dominated dynamics and Dimits threshold in curvature-driven ITG turbulence
P. G. Ivanov, A. A. Schekochihin, W. Dorland +2
The saturated state of turbulence driven by the ion-temperature-gradient instability is investigated using a two-dimensional long-wavelength fluid model that describes the perturbe…
Ion-scale turbulence in MAST: anomalous transport, subcritical transitions, and comparison to BES measurements
F. van Wyk, E. G. Highcock, A. R. Field +4
We investigate the effect of varying the ion temperature gradient (ITG) and toroidal equilibrium scale sheared flow on ion-scale turbulence in the outer core of MAST by means of lo…
Symmetry breaking in MAST plasma turbulence due to toroidal flow shear
M. F. J. Fox, F. van Wyk, A. R. Field +3
The flow shear associated with the differential toroidal rotation of tokamak plasmas breaks an underlying symmetry of the turbulent fluctuations imposed by the up-down symmetry of…
Experimental determination of the correlation properties of plasma turbulence using 2D BES systems
M. F. J. Fox, A. R. Field, F. van Wyk +3
A procedure is presented to map from the spatial correlation parameters of a turbulent density field (the radial and binormal correlation lengths and wavenumbers, and the fluctuati…
Transition to subcritical turbulence in a tokamak plasma
F. van Wyk, E. G. Highcock, A. A. Schekochihin +3
Tokamak turbulence, driven by the ion-temperature gradient and occurring in the presence of flow shear, is investigated by means of local, ion-scale, electrostatic gyrokinetic simu…
Pellet fuelling with edge-localised modes controlled by external magnetic perturbations in MAST
M Valovic, L Garzotti, C Gurl +6
The fuelling of plasmas by shallow frozen pellets with simultaneous mitigation of edge localised modes (ELM) by external magnetic perturbation is demonstrated on the MAST tokamak.…
Comparison of BES measurements of ion-scale turbulence with direct, gyrokinetic simulations of MAST L-mode plasmas
A R Field, D Dunai, Y-c Ghim +7
Observations of ion-scale (k_y*rho_i <= 1) density turbulence of relative amplitude dn_e/n_e <= 0.2% are available on the Mega Amp Spherical Tokamak (MAST) using a 2D (8 radial x 4…
Calculation of spatial response of 2D BES diagnostic on MAST
Y. -c. Ghim, A. R. Field, S. Zoletnik +1
The Beam Emission Spectroscopy (BES) turbulence diagnostic on MAST is to be upgraded in June 2010 from a 1D trial system to a 2D imaging system (8 radial \times 4 poloidal channels…
Measurement and physical interpretation of the mean motion of turbulent density patterns detected by the BES system on MAST
Y. -c. Ghim, A. R. Field, D. Dunai +4
The mean motion of turbulent patterns detected by a two-dimensional (2D) beam emission spectroscopy (BES) diagnostic on the Mega Amp Spherical Tokamak (MAST) is determined using a…