The properties of a partially ionized plasma in a long cylindrical tube subject to a uniform axial electric eld are investigated. The plasma is maintained by an external ionizing source balanced by bulk and surface recombinations. Collisions between neutrals, whose density greatly exceeds the density of charged particles, and of neutrals with ions are suuciently eeective for their velocity dist...

Numerical solutions have been obtained for the exact equations describing the propagation of periodic axisymmetric waves in a rigid cylindrical tube. Results were obtained for air over a range of conditions corresponding to shear wave numbers (s = Rm) from 0.2 to 5000 and reduced frequencies (k = oR/a) from 0.01 to 6. For conciseness and convenient application, the results for the attenuation a...

In this paper we construct and analyze new classes of wormhole and flux tube-like solutions for the 5D vacuum Einstein equations. These 5D solutions possess generic local anisotropy which gives rise to a gravitational running or scaling of the Kaluza-Klein “electric” and “magnetic” charges of these solutions. It is also shown that it is possible to self–consistently construct these anisotropic ...

The first description of the static characteristics of a device called magnetron was described by A. W. Hull in 1921. The tube had a linear filament in a coaxial cylindrical plate. The plate cylinder was surrounded by a winding, used to generate a magnetic field. The radial electric field and the superimposed magnetic field forced electrons to follow circular orbits before reaching anode. If th...