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

### From inside the book

Results 1-3 of 25

Page 99

When with current increase the particle densities in the column are finally

sufficient to provide the full ambipolar field, then ... not change, but the area

covered by the discharge increases with the current, keeping the

constant.

When with current increase the particle densities in the column are finally

sufficient to provide the full ambipolar field, then ... not change, but the area

covered by the discharge increases with the current, keeping the

**current density**constant.

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

3, we can relate the

I-F-mechanism. The result is - I shown in Fig. 5. Since—as 5 6 - 7 we have

already stated—the log(A/cm') parameter q must fulfil the Fig. 5. – q=jelji plotted

vs. the ...

3, we can relate the

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

already stated—the log(A/cm') parameter q must fulfil the Fig. 5. – q=jelji plotted

vs. the ...

### What people are saying - Write a review

We haven't found any reviews in the usual places.

### Contents

LEZIONI | 1 |

carrier mass | 159 |

hydrodynamique au voisinage dun axe magnétique | 214 |

Copyright | |

2 other sections not shown

### Other editions - View all

### 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