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

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Page 190

The terms of (4.7) for which k, -k, and k, -k, form a special set which we term

coherent 9, since the phase relationship of the time-derivative to the

independent of the

The terms of (4.7) for which k, -k, and k, -k, form a special set which we term

coherent 9, since the phase relationship of the time-derivative to the

**amplitude**isindependent of the

**amplitudes**involved. For this set, there is obviously a phase ...Page 191

However, we may make a simple orderof-magnitude estimate of the decay rate

by evaluating the second-order time derivative, first taking the first derivative of (

4.7) and then expressing the first derivatives in terms of

However, we may make a simple orderof-magnitude estimate of the decay rate

by evaluating the second-order time derivative, first taking the first derivative of (

4.7) and then expressing the first derivatives in terms of

**amplitudes**by repeated ...Page 194

In some problems, it would be convenient to follow the

oscillations and electromagnetic waves as functions of the spatial co-ordinates

rather than of time. This approach is appropriate, for instance, in the study of ...

In some problems, it would be convenient to follow the

**amplitudes**of the plasmaoscillations and electromagnetic waves as functions of the spatial co-ordinates

rather than of time. This approach is appropriate, for instance, in the study of ...

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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