Acquisition of a Versatile Dilution Refrigerator System for Testing Low Temperature Particle Detectors

旧金山州立大学(SFSU)物理与天文学系将获得一个多功能稀释制冷机系统，专门用于测试低温基本粒子探测器，该探测器由旧金山州立大学的物理学硕士学生以及附近机构的研究人员和博士生共同制造，这些机构包括斯坦福大学(SU)、劳伦斯·利弗莫尔国家实验室(LLNL)和加州大学伯克利分校(UCB)。这些新型探测器将通过检测入射粒子与超导和绝缘晶体中的核和电子碰撞产生的准粒子、声子和电子-空穴对来获得无与伦比的灵敏度和分辨率。这项研究的最初目标是开发用于暗物质搜索、中微子实验和X射线天文测量的探测器。随着技术的成熟，更多的应用可能包括测量散装材料中的超低阿尔法放射性，以及对痕量元素的X射线荧光。

The San Francisco State University (SFSU) Department of Physics and Astronomy will acquire a versatile dilution refrigerator system dedicated to the testing of low temperature elementary particle detectors fabricated by physics Master's students at SFSU and by collaborating researchers and Ph.D. students at nearby institutions including Stanford University (SU), Lawrence Livermore National Laboratory (LLNL), and the University of California at Berkeley (UCB). These novel detectors will achieve unparalled sensitivity and resolution by sensing quasiparticles, phonons, and electron-hole pairs generated by collisions of incident particles with nuclei and electrons in superconducting and insulating crystals. The initial goals of the research effort are to develop detectors for dark matter searches, neutrino experiments, and X-ray astronomy measurements. As the technology matures, additional applications are likely to include measurements of ultralow alpha radioactivity in bulk materials, Xray fluorescence for trace elements.