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

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Page 99

Characteristic for the subnormal region is that the diffusion is not ambipolar since

the particle

provide ...

Characteristic for the subnormal region is that the diffusion is not ambipolar since

the particle

**densities**are too small to build up the ambipolar field. When with**current**increase the particle**densities**in the column are finally sufficient toprovide ...

Page 105

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

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 107

density j, which we call the I-F-emission density. The effect calculated in this way

resembles ... 3, we can relate the

the F-, T-F- or I-F-mechanism. The result is - I shown in Fig. 5. Since—as 5 6 - 7 ...

density j, which we call the I-F-emission density. The effect calculated in this way

resembles ... 3, we can relate the

**current density**j, to the value of q required forthe F-, T-F- or I-F-mechanism. The result is - I shown in Fig. 5. Since—as 5 6 - 7 ...

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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