Yin Zhiyuan, Bi Liya, Shi Yueqing, Li Shaowei
Department of Chemistry and Biochemistry, University of California, La Jolla, San Diego, California 92093-0309, United States.
Program in Materials Science and Engineering, University of California, La Jolla, San Diego, California 92093-0418, United States.
ACS Meas Sci Au. 2025 Jan 29;5(2):226-233. doi: 10.1021/acsmeasuresciau.4c00097. eCollection 2025 Apr 16.
We present the design of a helium liquefaction system tailored to efficiently recover helium vapor from either an individual or a small cluster of vibration-sensitive cryogenic instruments. This design prioritizes a compact footprint, mitigating potential contamination sources such as gas bags and oil-lubricated compressors while maximizing the recovery rate by capturing both the boil-offs during normal operation and the refilling process of the bath cryostat. We demonstrated its performance by applying it to a commercial low-temperature scanning probe microscope. It features a >94% recovery rate and induces negligible vibrational noise to the microscope. Due to its adaptability, affordability, compact size, and suitability for homemade setups, we foresee that our design can be utilized across a wide range of experimental measurements where liquid helium is used as the cryogen.
我们展示了一种氦液化系统的设计，该系统专为从单个或一小群对振动敏感的低温仪器中高效回收氦气而量身定制。此设计优先考虑紧凑的占地面积，减少诸如气袋和油润滑压缩机等潜在污染源，同时通过捕获正常运行期间的蒸发气以及低温恒温器的再填充过程来最大化回收率。我们将其应用于商用低温扫描探针显微镜来展示其性能。它的回收率超过94%，并且对显微镜产生的振动噪声可忽略不计。由于其适应性、经济性、紧凑的尺寸以及适用于自制装置，我们预计我们的设计可用于广泛使用液氦作为制冷剂的实验测量中。
