## Proceedings of the International School of Physics "Enrico Fermi.", Volume 25N. Zanichelli, 1953 - Nuclear physics |

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Page 64

For a simple example of an energy principle consider the one-dimensional

motion of a particle in a potential V: - = 0 , ôa. is the condition for

small motion about

For a simple example of an energy principle consider the one-dimensional

motion of a particle in a potential V: - = 0 , ôa. is the condition for

**equilibrium**. Asmall motion about

**equilibrium**is given by m 62 V If 0° V/6.co is negative the**equilibrium**...Page 138

However we know on general grounds that any collective motions which do exist,

like microinstabilities, will at least move in the direction of thermodynamic

motions of ...

However we know on general grounds that any collective motions which do exist,

like microinstabilities, will at least move in the direction of thermodynamic

**equilibrium**. One may pose then the question whether the purely collectivemotions of ...

Page 152

... electrostatic instabilities and consider simple localized instabilities. We also

choose the simplest geometry: magnetic field in the z direction, and plasma

parameters and field strength varying with z. Thus, for the

can take, ...

... electrostatic instabilities and consider simple localized instabilities. We also

choose the simplest geometry: magnetic field in the z direction, and plasma

parameters and field strength varying with z. Thus, for the

**equilibrium**field, wecan take, ...

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### Contents

LEZIONI | 1 |

carrier mass | 159 |

hydrodynamique au voisinage dun axe magnétique | 214 |

Copyright | |

2 other sections not shown

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### Common terms and phrases

adiabatic invariant amplitude approximation assumed Boltzmann equation boundary conditions boundary layer calculated cathode charge coefficient collision components consider const constant contraction corresponds courbe critère current density Debye length derived differential equations discharge dispersion relation distribution function dºr eigenvalue electric field electromagnetic waves electrostatic energy principle equations of motion equilibrium exp i(k exp ioctl exp ior experimental finite fluid theory frequency given Hence instability integral interaction ioctl ionized KRUSKAL l'axe magnétique lignes limit lowest order magnetic field Maxwell's equations negative ions nonlinear obtain parameter particle perturbation Phys plasma oscillations Plasma Physics Poisson's equation potential problem quantities radial region satisfied saturation current ſº solution solving stabilité stability surface temperature thermal tion values vanish variables vector velocity voisinage waves in plasmas zero zero-order