Acquisition of a Dilution Refrigerator

购买稀释冰箱

• 批准号: 9503701
• 负责人: Gang Xiao
• 金额: $ 9.29万
• 依托单位: Brown University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-07-01 至 1997-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9503701&HistoricalAwards=false
• 关键词: Acquisition; Dilution; Refrigerator

9503701 Xiao A packaged commercial dilution refrigerator will be acquired and its usage will be divided among four research projects requiring experiments at millikelvin temperatures. One project studies quantum phase- coherent transport in normal-superconducting metal mesoscopic structures. The new quantum transport phenomenom reveals itself in the low temperature range. A second project investigates semiconductor devices exhibiting quantum transport effects such as resonant tunneling, ballistic transport over macroscopic distances, and Coulomb blockade. Low temperature transport measurements will be performed on semiconductor nanostructures of adjustable dimensionality and lateral extent. A third project will use the dilution refrigerator to test ultra-sensitive millimeter-wave detectors developed to study the background radiation of the universe. To achieve the required sensitivity, these detectors have to be operated at millikelvin temperatures. The fourth project studies phonon propagation in layered compounds and the effects of disorder on the scattering of phonons in crystalline solids at very low temperatures. %%% The acquisition of a single instrument for experiments impacting a wide range of fields is very cost effective. Quantum transport phenomena play an important role in small structures that are the result of the ever- decreasing dimensions of microelectronic devices. ***

9503701 小 将购买一台包装好的商用稀释冰箱，并将其使用分配给四个需要在毫开尔文温度下进行实验的研究项目。一个项目研究普通超导金属介观结构中的量子相位相干传输。新的量子传输现象在低温范围内显现出来。第二个项目研究表现出量子传输效应的半导体器件，例如共振隧道效应、宏观距离的弹道传输和库仑封锁。 低温输运测量将在尺寸和横向范围可调的半导体纳米结构上进行。第三个项目将使用稀释制冷机来测试为研究宇宙背景辐射而开发的超灵敏毫米波探测器。为了达到所需的灵敏度，这些探测器必须在毫开尔文温度下运行。第四个项目研究层状化合物中的声子传播以及极低温度下结晶固体中无序对声子散射的影响。 %%% 购买一台仪器进行影响广泛领域的实验非常具有成本效益。 量子输运现象在小型结构中发挥着重要作用，而小型结构是微电子器件尺寸不断减小的结果。 ***