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- W2034454858 abstract "The accepted view as to the very high electrical conductivity of space has raised difficulties in mechanisms concerning the production of cosmic-ray energies. It is to be observed that high conductivity does not avoid the existence of a saturation on current density, $i$, which is equal to nec, where $n$ is the sum of the numbers of positive and negative ions per cc. Thus for $n=1$, the saturation current density is of the order 5ifmmodetimeselsetexttimesfi{}${10}^{ensuremath{-}9}$ ampere/${mathrm{cm}}^{2}$. The effect of saturation is illustrated by the following idealized conditions.Consider two coplanar rings of gas $A$ and $B$, $A$ being the smaller. Under conditions of very high conductivity, it would be impossible for the magnetic flux through either circuit to change and the electric field would be zero. If $B$ expands, the flux through $A$ due to $B$ will change, but the total flux through $A$ will not change if $A$ has high conductivity. $A$ will acquire induced current to compensate the change of flux arising from $B$. However, as time proceeds, and if the ionic density in $A$ is small, a stage will be reached at which $A$ can no longer develop the current necessary for magnetic flux compensation. An electric field will now arise in $A$ and the ions will become accelerated to cosmic-ray energies, not by appreciable alteration of velocity which has already attained its maximum $c$, but by alteration of relativistic mass." @default.
- W2034454858 created "2016-06-24" @default.
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- W2034454858 date "1955-05-15" @default.
- W2034454858 modified "2023-09-27" @default.
- W2034454858 title "Results of Limitations on Space Current Densities in Galactic and Intergalactic Space" @default.
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- W2034454858 doi "https://doi.org/10.1103/physrev.98.871" @default.
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