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. ***

提出了9510306曲吉玛实验，以探索在超低温度和高磁场下液体HE-3的磁性超流体A-1相。 A-1相的温度宽度将通过开发声学温度计来测量。 超流体分数将使用自旋/熵波传播技术测量。自旋松弛将通过新型的机械装置来测量以检测自旋密度。 所有这些测量值都从我们以前的5特斯拉的最大场扩展到15特斯拉。 %%液体氦-3将经过低至0.001摄氏度的温度，并具有高达150,000高斯的磁场。 在这些条件下，液体氦3转化为独特的磁性超流体状态。研究的重点是测量在超低温度下磁极化对超流体状态的影响。 在拟议的实验中，将使用声学和机械设备研究热力学，流体动力和磁性。 对超流体状态的更好理解可能应用于对金属的更熟悉的超导状态的研究。 ***