Next Generation Cryogen-free ADR Cryostat

We propose to develop the next generation cryogen-free Adiabatic Demagnetization Refrigerator (ADR) system. It is a two stage ADR system that employs a self-shielded conductively cooled superconducting magnet and non-filamentary support for the paramagnetic pills. This is an improved version from Janis current cryogen-free ADR system product line, and the new system will be more user-friendly and cost effective. The self-shielded magnet has approximately 5 gauss stray field at the end of the horizontal cold finger before further magnetic shield is added. The non-filamentary support employs vespel tubing with very thin wall, supported by the specially designed supporting mechanism. The design might be further simplified by using a single stage ADR, and details will be discussed. COMMERCIAL APPLICATIONS: Due to its applications in various fields, such as astrophysics, quantum computing, bio-physics, and etc., Janis current ADR systems has a very stable market during the past years. The next generation ADR systems as described in this proposal is expected to become more desirable since it will be more user-friendly and cost effective. One example will be what was mentioned in the NIST SBIR solicitation :"It is anticipated that a successful refrigerator would be immediately marketable to the X-ray microanalysis market and to other users of very low temperature refrigerators".