CreaTec - Model TUBO- Evaporators - Brochure

Instead of a wire filament, the TUBO source uses a tubular filament that encloses the entire crucible. The heating current flows along the source axis, up through the heat insulation shields and down through the filament. The crucible temperature is controlled via a thermocouple at the bottom of the crucible. This concept enables a reproducible temperature control of a standard effusion source at a high temperature range so far only accessible with e-beam evaporation. For extremely high temperatures, the TUBO-e includes an electron emission booster heater.