Some properties of nonlinear oscillations in a diode in the space charge–limited current regime

Both the initial and late non-linear stages of the oscillation process in a beam vacuum diode in the space-charge-limited current regime are numerically investigated. Two different numerical methods are applied: Birdsall's code (B-code) and Ender-Kuznetsov code (EK-code). The capabilities of both codes are compared. The high accuracy of the EK-code gives an opportunity to build dispersion branches of instability. The domain of the parameter values, when simultaneously several stable dynamical states (limit cycles) exist, is found. A sharp decrease in the amplitude of oscillations is revealed already under a comparatively small (about 2.5%) spread in velocities of the electron beam

OPTICAL INVESTIGATIONS OF THE SPONTANEOUS EXTINCTION OF THE HIGH-CURRENT KNUDSEN ARC DISCHARGE IN Cs-Ba GAS MIXTURE

The investigations of the spontaneous arc extinction in a switching Cs-Ba triode with a fine-mesh grid, operating in the collisionless mode, have been carried out. The use of Cs-Ba mixture, where cesium is a plasma-forming component, allowed to obtain emission currents from the cathode up go 100 A/cm2 in Cs-pressure range 10-3 - 10-2 Torr and, thus, easily attain the limits of gas current-conduction capacity

Safety problems of nuclear power plants with pressure-tube graphite reactors cooled by boiling water

Translated from Russian (IAEA-CN--36/341 p. 385-399)SIGLEAvailable from British Library Document Supply Centre- DSC:9022.381(HSE-Trans--11808)T / BLDSC - British Library Document Supply CentreGBUnited Kingdo