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

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Page 104

Electrons can be freed from the metal thermally (T-

electric field (F-

the Y effect of single or multiply charged ions (Y-

excited ...

Electrons can be freed from the metal thermally (T-

**emission**), by an externalelectric field (F-

**emission**), by the combined effect of the above (T-F-**emission**), bythe Y effect of single or multiply charged ions (Y-

**emission**), by the Y effect ofexcited ...

Page 105

[V*/cm2], where j, is the

potential across the space-charge region. V., X, and j, have to be measured in V,

V/cm and A/cm3, respectively. MacKeowns formula is based on the assumption

that ...

[V*/cm2], where j, is the

**emission**current density at the cathode and V, thepotential across the space-charge region. V., X, and j, have to be measured in V,

V/cm and A/cm3, respectively. MacKeowns formula is based on the assumption

that ...

Page 117

However, under this condition the mechanism of T-F or I-F-field electron

leads to difficulties. Only if the conditions of the surface favour the process of

However, under this condition the mechanism of T-F or I-F-field electron

**emission**leads to difficulties. Only if the conditions of the surface favour the process of

**emission**is there any hope of igniting the arc with extreme contraction. If these ...### What people are saying - Write a review

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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