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6 papers · 1 filter
Another look at the BL Lacertae flux and spectral variability
C. M. Raiteri, M. Villata, L. Bruschini +52
The GLAST-AGILE Support Program (GASP) of the Whole Earth Blazar Telescope (WEBT) monitored BL Lacertae in 2008-2009 at radio, near-IR, and optical frequencies. During this period,…
Momentum injection in tokamak plasmas and transitions to reduced transport
F. I. Parra, M. Barnes, E. G. Highcock +2
The effect of momentum injection on the temperature gradient in tokamak plasmas is studied. A plausible scenario for transitions to reduced transport regimes is proposed. The trans…
Phase-space Lagrangian derivation of electrostatic gyrokinetics in general geometry
Felix I. Parra, Ivan Calvo
Gyrokinetic theory is based on an asymptotic expansion in the small parameter , defined as the ratio of the gyroradius and the characteristic length of variation of the magnetic…
Fast magnetic reconnection in the plasmoid-dominated regime
D. A. Uzdensky, N. F. Loureiro, A. A. Schekochihin
A conceptual model of resistive magnetic reconnection via a stochastic plasmoid chain is proposed. The global reconnection rate is shown to be independent of the Lundquist number.…
Transport Bifurcation in a Rotating Tokamak Plasma
E. G. Highcock, M. Barnes, A. A. Schekochihin +3
The effect of flow shear on turbulent transport in tokamaks is studied numerically in the experimentally relevant limit of zero magnetic shear. It is found that the plasma is linea…
On the diffusive propagation of warps in thin accretion discs
G. Lodato, D. Price
In this paper we revisit the issue of the propagation of warps in thin and viscous accretion discs. In this regime warps are know to propagate diffusively, with a diffusion coeffic…