Generation of Ultra High Energy Density Electron Beam and its Application for Deep Penetration Welding

Characteristics of 500kV Electron Beam Heat Source (Report 1)

Abstract

An urtra-high voltage electron beam heat source with an electron gun employing 11-stage electromagnetic accelerating units was developed. The characteristics of the electron beam were studied and a strongly focused electron beam with an ultra-high average beam power density of 160-170 kW/mm² using a beam power of 140-180 kW was successfully generated. Applicability of 500 kV ultra-high voltage electron beam to welding was investigated and it was found that this beam enabled a penetration depth of max 240 mm in flat position welding with a beam power of 180 kW and a welding speed of 6.7 mm/s, allowing a narrow weld bead to be produced with high efficiency.