# Observation of a critical pressure gradient for the stabilization of interchange modes in simple magnetized toroidal plasmas

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A first theoretical attempt is made to present a relativistic generalization of the well-known orbit-limited motion theory. The appropriate relativistic (electron and ion) dust charging currents are derived. The nonlinear electrostatic potential is then expressed in terms of the variable dust...

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A recent paper [L.-N. Hau and W.-Z. Fu, Phys. Plasmas 14, 110702 (2007)] deals with certain mathematical and physical properties of the kappa distribution. We comment on the authorsâ€™ use of a form of distribution function that is different from the â€œstandardâ€ form of the kappa...

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In a recent paper by Kuhn et al. [Phys. Plasmas 13, 013503 (2006)], it has been demonstrated that in a plasma, the polytropic coefficient Î³ is a spatially varying quantity rather than a global constant as usually assumed in fluid theory. Assuming cold ion sources and using the asymptotic...

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- Response to â€œComment on â€˜Mathematical and physical aspects of Kappa velocity distributionâ€™ â€ [Phys. Plasmas 16, 094701 (2009)]. Hau, L.-N.; Fu, W.-Z.; Chuang, S.-H. // Physics of Plasmas;Sep2009, Vol. 16 Issue 9, p094702
The comment questions the formulation of the Îº velocity distribution function used in our paper as compared to a slightly different form used by the authors. The difference in the distribution function necessarily leads to different number densities, thermal pressures, etc. We show that the...

- Variation of plasma parameters as function of the pressure. Restrepo, Elisabeth; Devia, Alfonso // AIP Conference Proceedings;2001, Vol. 563 Issue 1, p53
This work presents measurements of temperature and density of a plasma as function of pressure. The plasma was produced by a pulsed discharge used to obtain TiN coatings. The system is composed by a chamber, which is filled with nitrogen at pressures that vary between 0.2 to 3.0 mb. Optical...