The cryostat shall consist of a cryogen-free dilution refrigeration system vertically suspended from a floor mounted vibration isolation frame. A hermetically sealed sample chamber with He-4 filling and pumping lines shall be mounted on the mixing chamber plate and optical access to the sample chamber shall be provided via both free space viewports and optical fibers. The cryostat must be integratable with an optical table. The total clear height required for the system including installation and maintenance should be no more than 3 meters measured from laboratory floor level.
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