Custom Installation:
Twin HM2 e-guns™ mounted on a Single Flange. Inside View. |
Theory of Operation
Electron beam heating is an efficient way of achieving temperatures in excess of 3500°C (6300°F) for uniform thin film, optical coating and vacuum metallurgic processes. The all-metal-sealed models are bakeable to 230°C (446°F). The e-Gun™ source and companion control power supply have been designed to be part of any high or ultra-high vacuum system.
The e-Gun™ source is a self-accelerated electron beam device. A beam of electrons, held at a high negative potential, is produced by the hot tungsten filament. The beam of electrons leaving the filament is magnetically focused and then deflected 270° by the integral permanent magnet. The electron beam is accelerated into the evaporant material contained within the water-cooled, grounded crucible. The beam strikes the evaporant material with a spot of approximately 1/8” diameter and an intensity of approximately 25 kW/cm2. Sweeping the electron beam across the evaporant material contained in the crucible is performed by an electro-magnetic system, with either manual or automatic controls. |