Large diameter rotating lid vacuum chamber

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Abstract

A new design for a large diameter rotating lid vacuum chamber is presented which incorporates two innovations: 1) a statically loaded rotating double lid; 2) a ferromagnetic liquid vacuum seal. These features nearly eliminate the normal friction from atmospheric loading and vacuum seal compression, thus requiring extremely low torque for rotation. The lid on a typical chamber 1 m in diameter with a hard vacuum against 1 atm could be rotated at 0.1 rpm with a torque of about 0.1 inch ounce. Model tests have verified the principles of the design.

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Work performed under the auspices of the U.S. Atomic Energy Comission.

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