Modular sources are fitted with direct watercooled crucibles. Select models have indirectly cooled crucibles that allow the user to change crucibles without interrupting the flow of water to the source and without having to disassemble the source. Modular sources are offered with material capacities from 6cc to 400cc in a multitude of pocket geometries and arrangements. They are available in both fixed and rotary pocket mechanisms for high and ultrahigh vacuum environments. e-Vap® modular sources are designed for optimum performance with e-Vap® power supplies, controls and electronics. Other essential components and hardware required for the installation of e-Vap® modular sources are detailed in e-Vap® accessories section.

Contact the MDC technical sales engineers for custom electronbeam evaporation requirements.

Source Type... The modular sources listed below are categorized by Source Type. Specifications for each source are detailed by Frame Size on the individual frame pages. The diagram below gives a bird’s-eye view of the various crucible pocket geometries offered in this section. 

Direct vs Indirect Water Cooling... Direct cooling provides  water circulation through a crucible’s elaborate hollow core, thus directly cooling the copper crucible. Indirect water cooling employs a solid Crucible / Pocket Geometry copper crucible in intimate contact with the source’s watercooled copper base. Indirectly cooled sources allow crucible replacement without having to disconnect water lines, but must be operated at lower power levels.

Crucible Liners... MDC recommends using crucible liners with all e-Vap evaporation sources. These liners offer improved thermal stability while reducing the transfer of heat to the crucible. Liners provide the ability to easily and quickly switch evaporant materials without removing the crucible for cleaning. They also reduce power requirements to achieve specific evaporation rates. For a detailed list of crucible liner materials click here.