The Helium Recovery and Liquefaction System of the Synergetic Extreme Condition User Facility (SECUF) of the Institute of Physics (IOP), CAS finished construction and yielded liquid helium on March 8, 2021. All the helium recovery pipelines on the campus were put into use on the same day. This marks the completion and full operation of the cryogenic support system on IOP Huairou Campus.

As one of the technology support systems of SECUF, the System’s operation is a strong guarantee for experiments at low-temperature on IOP Huairou Campus, and an important pre-condition for achieving construction goals, including key indicators like 1mK ultra-low temperature and 26T (superconducting magnet) high magnetic field. The completion of the System is also an important milestone of the construction of SECUF. The liquid helium is required for the installation and debugging of more than a dozen subsystems of the Facility. Upon being put into operation, the System is expected to yield a liquid helium production rate of 130L/H. Its production capacity will meet the long-term demand of IOP Huairou Campus.

SECUF is a world-leading user facility integrating extreme conditions such as ultra-low temperature, ultra-high pressure, strong magnetic field and ultra-fast light field. Its construction was commenced in Huairou Science City on September 30, 2017. The civil works was completed on July 3, 2020, making the site ready for equipment installation and debugging, and trial operation. As an important part of IOP Huairou Campus and the first large scientific facility to finish construction in the core area of Huairou Science City, the Facility has been the first to go into partial operation on October 30, 2020. It is expected to be fully completed and open for domestic and international use in June 2022.