Accession Number : AD0269969

Title :   PULSE HEATING OF MATERIALS BY HIGHLY CONCENTRATED ELECTRON BEAMS

Corporate Author : EITEL-MCCULLOUGH INC SAN BRUNO CALIF

Personal Author(s) : HEIL,OSKAR ; VOGEL,SIEGFRIED

Report Date : OCT 1961

Pagination or Media Count : 1

Abstract : Electron bombardment provides a means of heating with high local energy concentration and definition. The object is to investigate surface explosions and structural changes of matter caused by high temperatures, large temperature gradients and fast quenching rates connected with electron bombardment. It is intended to operate close to the absolute limits of energy concentration in electron beams. A theoretical study was made of the mechanism of electron beam focusing to determine the maximum obtainable beam compression. Results show that for low perveance beams the compression limit is set by the laws of thermodynamics. For high perveance beams, the thermodynamic limit cannot be reached because the electric and/or magnetic fields required become technically impossible. A numerical example illustrates this. An existing high perveance electron gun with a high area convergence ratio was adapted for the planned experiments. (Author)

Descriptors :   *ELECTRON BEAMS, *HEATING, *VOLUMETRIC ANALYSIS, MASS ENERGY RELATION, MATERIALS, RADIOFREQUENCY PULSES, TUNGSTEN, ZINC

Distribution Statement : APPROVED FOR PUBLIC RELEASE