Non-Equilibrium Plasma Instabilities

• Authors: J. Petit , J. Geffray
• Languages of publication: EN

Abstracts

EN

Low magnetic Reynolds non-thermal plasmas are sensitive to the Velikhov electrothermal instability when the Hall parameter exceeds the local critical value. Then the instability quickly grows and highly reduces the performance of MHD converters. After operating (International MHD Meeting, Warsaw 1968) the first high power density two-temperature - but short duration - MHD Faraday generator, using a first stabilization method, we presented a better one in the beginning of the eighties that was demonstrated through low pressure experiments (French Academy of Sciences, 1981; and 8th International MHD meeting, Moscow 1983). This second method was based on a non-uniform B-field and electrical tensor conductivity. It is time now to rebuild MHD activities all over the world as deserved, corresponding to progress of today's techniques. Different applications of this instability cancellation are presented.

Keywords

EN

52.30.Cv; 52.35.-g; 52.55.-s

Discipline

• 52.55.-s: Magnetic confinement and equilibrium(see also 28.52.-s Fusion reactors)
• 52.35.-g: Waves, oscillations, and instabilities in plasmas and intense beams(see also 94.20.wf Plasma waves and instabilities in physics of the ionosphere; 94.30.cq MHD waves, plasma waves, and instabilities in physics of the magnetosphere; 96.50.Tf MHD waves, plasma waves, turbulence in interplanetary physics)
• 52.30.Cv: Magnetohydrodynamics (including electron magnetohydrodynamics)(see also 47.65.-d Magnetohydrodynamics and electrohydrodynamics in fluid dynamics; for MHD generators, see 52.75.Fk; see also 95.30.Qd Magnetohydrodynamics and plasmas in astrophysics)

• Journal: Acta Physica Polonica A
• Year: 2009
• Volume: 115
• Issue: 6
• Pages: 1170-1172

Dates

published

2009-06

Contributors

author

J. Petit

• LAMBDA Laboratory, France

author

J. Geffray

• LAMBDA Laboratory, France

References

• 1. E. Velikhov, in: Proc. 1st Int. Conf. on MHD Electrical Power Generation, Newcastle (England) 1962, p. 47
• 2. J.P. Petit, J. Valensi, Compt. Rend. Acad. Sci. Paris 269, (1969)
• 3. J.P. Petit, J.P. Caressa, J. Valensi, in: Proc. Int. Symp. on MHD Electrical Power Generation, Warsaw (Poland) S.M. 107/123: 745 (1968)
• 4. J.P. Petit, M. Billiotte, Compt. Rend. Acad. Sci. Paris 292, 158 (1981)
• 5. J.P. Petit, in: Proc. 8th Int. Conf. on MHD Electrical Power Generation, Moscow (Russia) 1983

Identifiers

DOI

10.12693/APhysPolA.115.1170