US-Netherlands Cooperative Research: High Magnetic Field Studies at Ultralow Temperatures

美国-荷兰合作研究：超低温下的高磁场研究

• 批准号: 8922644
• 负责人: Mark Meisel
• 金额: $ 0.88万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-08-15 至 1992-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8922644&HistoricalAwards=false
• 关键词: US; Netherlands; Cooperative; Research; Magnetic

This award supports Mark W. Meisel and others of the Microkelvin Research Laboratory of the University of Florida for an international research collaboration in physics and cryogenic engineering with Giorgio Frossati, Director, and others, of the High Magnetic Field/Low Temperature Laboratory of the University of Leiden, The Netherlands. Their physics collaboration involves the study of highly polarized normal liquid and superfluid Helium-3 and the magnetic phase diagram of solid Helium-3. Meisel offers substantial ultrasonic expertise to the study of polarized liquid Helium at Leiden. Both groups will benefit from an exchange of experience as each team studies solid helium-3 under slightly different conditions. Their cooperative work in cryogenic engineering will benefit greatly from the pioneering work at Leiden. They will work jointly on the design and construction of a high cooling power dilution refrigerator (DR) that will encircle a nuclear demagnetization refrigerator (NDR.) Nesting the DR/NDR system will shorten the length of the high magnetic field/low temperature cryostats. This will reduce the intrinsic vibration problems associated with five- meter-long cryostats and it will eliminate the need for long, narrow neck dewars that are difficult to fabricate. The first prototype will be built in Leiden and the second generation system will be constructed for the University of Florida. It will be ideally suited for a low temperature station at the new NSF High Magnetic Field Facility presently being planned.

该奖项支持Mark W。Meisel和Microkelvin的其他人 佛罗里达大学国际研究实验室 物理学和低温工程研究合作， Giorgio Frossati，主任，和其他人，高磁 莱顿大学野外/低温实验室 荷兰. 他们的物理学合作包括研究 高度极化的正常液体和超流体氦-3和 固态氦-3的磁性相图。 Meisel提供大量 超声波技术在极化液氦研究中的应用 莱顿 两个小组将从经验交流中受益， 每一个小组都在略微不同的条件下研究固态氦-3。 他们在低温工程方面的合作将有利于 在莱顿的开创性工作中受益匪浅。 他们将共同努力 关于一个高冷却功率稀释器的设计和建造， 冰箱（DR），将包围核退磁 冰箱（NDR.） DR/NDR系统的嵌套将缩短 高磁场/低温恒温器的长度。 这 将减少与五个相关的固有振动问题- 米长的低温恒温器，它将消除需要长，窄， 颈部杜瓦瓶很难制造。 第一个原型 将在莱顿建造，第二代系统将 为佛罗里达大学建造的。 这将是理想的 适用于新的NSF高磁低温站 目前正在规划外地设施。