103 citations · 261 across the 14 of their papers we have counts for
13 papers
A One-Dimensional Tearing Mode Equation for Pedestal Stability Studies in Tokamaks
J. W. Connor, R. J. Hastie, C. Marchetto +1
Starting from expressions in Connor et al. (1988) [1], we derive a one-dimensional tearing equation similar to the approximate equation obtained by Hegna and Callen (1984) [2] and…
Collisionless microinstabilities in stellarators. IV. The ion-driven trapped-electron mode
G. G. Plunk, J. W. Connor, P. Helander
Optimised stellarators and other magnetic-confinement devices having the property that the average magnetic curvature is favourable for all particle orbits are called maximum- d…
Gyrokinetic stability theory of electron-positron plasmas
Per Helander, J. W. Connor
The linear gyrokinetic stability properties of magnetically confined electron-positron plasmas are investigated in the parameter regime most likely to be relevant for the first lab…
The Effect of Plasma Beta on High-n Ballooning Stability at Low Magnetic Shear
J W Connor, C J Ham, R J Hastie
An explanation of the observed improvement in H-mode pedestal characteristics with increasing core plasma pressure or poloidal beta, as observed in MAST and JET, is sought in terms…
Resilience of quasi-isodynamic stellarators against trapped-particle instabilities
J. H. E. Proll, P. Helander, J. W. Connor +1
It is shown that in perfectly quasi-isodynamic stellarators, trapped particles with a bounce frequency much higher than the frequency of the instability are stabilizing in the elec…
Magnetic compressibility and ion-temperature-gradient-driven microinstabilities in magnetically confined plasmas
A. Zocco, P. Helander, J. W. Connor
The electromagnetic theory of the strongly driven ion-temperature-gradient (ITG) instability in magnetically confined toroidal plasmas is developed. Stabilizing and destabilizing e…
The Role of Thermal Conduction in Tearing Mode Theory
J. W. Connor, C. J. Ham, R. J. Hastie +1
The role of anisotropic thermal diffusivity on tearing mode stability is analysed in general toroidal geometry. A dispersion relation linking the growth rate to the tearing mode st…
High-m Kink/Tearing Modes in Cylindrical Geometry
J. W. Connor, R. J. Hastie, I. Pusztai +2
The global ideal kink equation, for cylindrical geometry and zero beta, is simplified in the high poloidal mode number limit and used to determine the tearing stability parameter,…
Collisionless microinstabilities in stellarators III - the ion-temperature-gradient mode
G. G. Plunk, P. Helander, P. Xanthopoulos +1
We investigate the linear theory of the ion-temperature-gradient (ITG) mode, with the goal of developing a general understanding that may be applied to stellarators. We highlight t…
Electromagnetic effects in the stabilization of turbulence by sheared flow
M. D. J. Cole, S. L. Newton, S. C. Cowley +4
We have extended our study of the competition between the drive and stabilization of plasma microinstabilities by sheared flow to include electromagnetic effects at low plasma …
The Stochastic Field Transport associated with the Slab ITG Modes
J W Connor, R J Hastie, A Zocco
Many models for anomalous transport consider the turbulent ExB transport arising from electrostatic micro-instabilities. In this paper we investigate whether the perturbed magnetic…
Improved Criterion for Sawtooth Trigger and Modelling
A. Zocco, J. W. Connor, C. G. Gimblett +1
We discuss the role of neoclassical resistivity and local magnetic shear in the triggering of the sawtooth in tokamaks. When collisional detrapping of electrons is considered the v…
Ion Landau Damping on Drift Tearing Modes
J. W. Connor, R. J. Hastie, A. Zocco
Kinetic treatments of drift-tearing modes that match an inner resonant layer solution to an external MHD region solution, characterised by , fail to properly match the…