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

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Page 252

This invariant is not strictly a

experienced by a spiralling particle during one gyration period approaches zero.

Thus, if the ...

This invariant is not strictly a

**constant**of the motion but only an approximate**constant**, the approximation getting better as the percentage change in Bexperienced by a spiralling particle during one gyration period approaches zero.

Thus, if the ...

Page 254

There are many problems in physics in which there exist quantities which change

so slowly that they may be taken as

accuracy. Any such quantity whose change approaches zero asymptotically as ...

There are many problems in physics in which there exist quantities which change

so slowly that they may be taken as

**constants**of the motion to a high degree ofaccuracy. Any such quantity whose change approaches zero asymptotically as ...

Page 255

Consider the classic one-dimensional problem of an oscillator whose spring

, which only affects the motion through its spring

...

Consider the classic one-dimensional problem of an oscillator whose spring

**constant**is slowly varied by some external means, such as a varying temperature, which only affects the motion through its spring

**constant**. The counterpart of this...

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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