A Closed-Cycle Refrigerator for Low Temperature Measurementsby Undergraduates

本科生用于低温测量的闭环冰箱

• 批准号: 8951068
• 负责人: Ray Jones
• 金额: $ 0.73万
• 依托单位: Southwestern Oklahoma State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-07-15 至 1991-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8951068&HistoricalAwards=false
• 关键词: Closed; Cycle; Refrigerator; Low; Temperature

Southwestern Oklahoma State University will acquire a closed-circuit helium refrigerator which will make it possible for students to make measurements of the properties of various materials at controlled temperatures ranging from 10 K to 300 K. These measurements will include the properties of superconducting samples and low-temperature luminescence. Fourteen students have already been involved in the fabrication of YBaCuO superconducting samples and have made measurements of electrical conductivity and magnetic susceptibility from 77 K to 100 K using liquid nitrogen and a temperature controller which they designed and constructed. The refrigerator will make it possible to extend these measurements to 10 K. Students will use the refrigerator in both advanced laboratories in research. The university will match the award with an equal amount of funds.

俄克拉荷马州立大学西南部将获得一台闭路氦制冷机，这将使学生能够在10K至300K的受控温度下测量各种材料的性质。这些测量将包括超导样品的性质和低温发光。14名学生已经参与了YBaCuO超导样品的制备，并使用他们设计和建造的温度控制器和液氮对77K到100K的电导率和磁化率进行了测量。冰箱将使这些测量扩展到10K成为可能，学生们将在两个高级实验室的研究中使用冰箱。该大学将提供等额的资金来匹配这一奖项。