Use of a Secondary Current Sensor in Plasma during Electron-Beam Welding with Focus Scanning for Process Control

Figure 1

Scheme of secondary electron current registration in the plasma formed above the zone of EBW: 1, electron gun; 2, focusing lens; 3, plasma generated above the welding zone; 4, collector; 5, current registration and memory of the measured data; 6, load resistor; 7, voltage source; 8, welded sample.