A note on annihilator Banach algebras

Wong, Pak-Ken

doi:10.1017/s0004972700027258

Cited by 2 publications

(1 citation statement)

References 10 publications

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“…Magnetized plasmas covering many orders of magnitude in size, from earth-bound devices such as the tokamak [1], to planetary aurora [2] and stellar systems [3] exhibit a type of electromagnetic oscillation known as the shear Alfvén wave [4]. In tokamaks, shear Alfvén waves can be destabilized by the radial gradient of the energetic ion pressure [1], which may arise from ion-cyclotron resonance heating (ICRH) [5], neutral beam heating [6] or fusionborn alphas [7]. Shear Alfvén waves have the potential to enhance the loss of energetic ions through resonant transport [8,9], an important consideration for future burning plasma experiments.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of reversed shear Alfvén eigenmodes during the current ramp in the Alcator C-Mod tokamak

Edlund

Porkoláb

Kramer

et al. 2010

Plasma Phys. Control. Fusion

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Experiments conducted in the Alcator C-Mod tokamak at MIT have explored the physics of reversed shear Alfvén eigenmodes (RSAEs) during the current ramp. The frequency evolution of the RSAEs throughout the current ramp provides a constraint on the evolution of qmin, a result which is important in transport modeling and for comparison with other diagnostics which directly measure the magnetic field line structure. Additionally, a scaling of the RSAE minimum frequency with the sound speed is used to derive a measure of the adiabatic index, a measure of the plasma compressibility. This scaling bounds the adiabatic index at 1.40 ± 0.15 used in MHD models and supports the kinetic calculation of separate electron and ion compressibilities with an ion adiabatic index close to 7 4.

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