Haas Scholars

Yu-Dong Sun

Construction of a Novel, Cryogen-free, Self-contained Dilution Refrigerator

Technologies based on superconducting quantum systems have contributed significantly to the development of high precision magnetic sensors and quantum bits. These experiments require ultra-low temperatures which are achieved by dilution refrigerators. In contrast to conventional dilution refrigerators, which generally require a continuous supply of liquid helium and complex circulation systems, the dilution refrigerator Yu-Dong aims to construct will not use liquid cryogens and mechanical pumps. This will be accomplished by integrating a 2-Kelvin pulse tube cryostat with a self-contained dilution unit prototype from Chase Cryogenics, to further lower the base temperature to 50 milli-Kelvin. This novel dilution refrigerator will be fully computer controlled to optimize cool-down and hold-time, serving as an easy to use, fast cycling system for experiments on superconducting quantum mechanical systems.

  • Major: Materials Science and Engineering
  • Mentor: Professor Irfan Siddiqi