CHIPS R&D Compact Mobile Closed-Cycle Cryostat - Combined Sources Sought/Notice of Intent to Sole Source

The National Institute of Standards and Technology (NIST) is seeking information from sources that may be capable of providing a large sample stage cryostat. The cryostat should meet or exceed the following draft minimum specifications: self-contained compact optical cryostat with integrated optical breadboard, vacuum pump and all necessary accessories included, system must be able to be rolled by a single individual into and out of spectrometer location, water cooled compressor with helium lines longer than 12 M in order to be separated from experiment, and fully automated temperature control. Some key features of the cryostat include: • Cool down time: less than 5 hours to reach 5 K • Sample environment: cryogenic vacuum • Sample space: diameter greater than 70 mm • Sample exchange: easy access via removal of vacuum shroud • Ultra-low vibrations at cold plate: less than 7 nm • Temperature range: less than 4 K to greater than 300 K • Temperature stability: less than 20 mK • More than 30 electrical contacts into sample area required • Sample positioners with close loop piezo control of position for X and Y positioning of sample beneath objective • Incorporated low temperature objective with high magnification (50 X) apochromatic objective to operate within a low temperature environment (down to 4 K)