Experiments on Magnetic Superfluid State of Liquid Helium-3

液氦3磁超流态实验

• 批准号: 9510306
• 负责人: Haruo Kojima
• 金额: $ 30万
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-07-15 至 1999-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9510306&HistoricalAwards=false
• 关键词: Experiments; Magnetic; Superfluid; State; Liquid

9510306 Kojima Experiments are proposed to explore the properties of the magnetic superfluid A-1 phase of liquid He-3 at ultra low temperatures and in high magnetic fields. The temperature width of the A-1 phase will be measured by developing an acoustic thermometer. The superfluid fraction will be measured using spin/entropy wave propagation techniques. The spin relaxation will be measured by a novel mechanical device to detect spin density. All of these measurements are proposed to be extended from our previous maximum field of 5 tesla up to 15 tesla. %%% Liquid Helium-3 will be subjected to temperatures down to 0.001 degrees Kelvin and to magnetic fields as high as 150,000 gauss. Under these conditions, liquid Helium-3 transforms into a unique magnetic superfluid state. The focus of research will be to measure the effects of the magnetic polarization on the superfluid state at ultra low temperatures. Thermodynamic, hydrodynamic and magnetic properties will be investigated using acoustic and mechanical devices in the proposed experiments. Better understanding of the superfluid state might be applied to studies of more familiar superconducting states of metals. ***

9510306 Kojima实验旨在探索液态He-3的磁超流A-1相在超低温和强磁场下的性质。温度宽度 A-1相将通过开发声学温度计来测量。 超流分数将使用自旋/熵波传播技术进行测量。自旋弛豫将通过一种新的机械装置来测量，以检测自旋密度。 所有这些测量都建议从我们以前的最大磁场5特斯拉扩展到15特斯拉。 液氦-3将经受低至0.001开氏度的温度和高达150，000高斯的磁场。 在这些条件下，液态氦-3转变为一种独特的磁性超流体状态。研究的重点将是测量磁极化的影响 对 超流 在超低温下。 在拟议的实验中，将使用声学和机械装置研究热力学、流体动力学和磁性。 对超流态的更好理解可能适用于对更熟悉的金属超导态的研究。 ***