Rotary Vacuum Feedthrough

The NEC magnetic coupled rotary feedthrough is ideal for applications requiring the transmission of high speed rotary motion into ultra-high vacuum environments.  It is used to measure beam cross sectional shape.

The NEC rotary feedthrough consists of two magnets on opposite sides of a stainless steel plate.  UHV compatible ball bearings supply support for a rotating shaft in the vacuum volume.  There is no physical break across the vacuum barrier.  It is designed to support a torque of 10 in-oz.

This feedthrough mechanism is very similar to the rotary feedthrough used on the NEC Beam Profile Monitor (BPM), which is used to turn a wire through an ion beam.

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