Experimental Studies of Superfluid Helium Three

超流氦三的实验研究

• 批准号: 9510496
• 负责人: Christopher Gould
• 金额: $ 15万
• 依托单位: University of Southern California
• 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: 1995-08-01 至 1997-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9510496&HistoricalAwards=false
• 关键词: Experimental; Studies; Superfluid; Helium; Three

9510496 Gould This project is a study of materials at ultralow temperatures and the development of ultralow temperature techniques. The experiments are carried out at temperature substantially below 1K. Several areas research are represented. One addresses the magnetic properties of superfluid 3He. The experiments are of interest because they will provide important test of extant theories, and address fundamental issues related to low temperature magnetic measurement methods. The second is the magnetism of thin films of 3He. The thin film magnetism differs in interesting ways from bulk magnetic properties of 3He. The third area is the transport properties of thin metal films and the development of instrumentation based on superconducting quantum interference devices (SQUIDS). This includes important research in a new area of mesoscopic physics. The various research projects are of a fundamental nature, but may have technical relevance in the context of advanced materials and devices operating at cryogenic temperatures. For example, ultrasensitive SQUID devices have been employed in clinical studies of the weak magnetic fields originating from brain wave activity. %%% This project is a study of materials at ultralow temperatures and the development of ultralow temperature techniques. The experiments are carried out at temperature substantially below 1K. Several areas research are represented. One addresses the magnetic properties of superfluid 3He. The experiments are of interest because they will provide important test of extant theories, and address fundamental issues related to low temperature magnetic measurement methods. The second is the magnetism of thin films of 3He. The thin film magnetism differs in interesting ways from bulk magnetic properties of 3He. The third area is the transport properties of thin metal films and the development of instrumentation based on superconducting quantum interference devices (SQUIDS). This includes important research in a new area of mesoscopic physics. The various research projects are of a fundamental nature, but may have technical relevance in the context of advanced materials and devices operating at cryogenic temperatures. For example, ultrasensitive SQUID devices have been employed in clinical studies of the weak magnetic fields originating from brain wave activity. ***

9510496古尔德这个项目是对超低温材料的研究和超低温技术的发展。这些实验是在基本上低于1K的温度下进行的。本文代表了几个研究领域。其中一个涉及超流3He的磁性。这些实验很有意义，因为它们将提供对现有理论的重要检验，并解决与低温磁测量方法有关的基本问题。二是3He薄膜的磁性。薄膜磁性与3He的体磁性质有很大的不同。第三个领域是金属薄膜的输运特性和基于超导量子干涉器件的仪器的发展。这包括在介观物理的一个新领域的重要研究。各种研究项目都是基础性的，但在低温下运行的先进材料和设备的背景下可能具有技术相关性。例如，超灵敏的鱿鱼设备已被用于脑波活动产生的弱磁场的临床研究。这个项目是对超低温材料的研究和超低温技术的发展。这些实验是在基本上低于1K的温度下进行的。本文代表了几个研究领域。其中一个涉及超流3He的磁性。这些实验很有意义，因为它们将提供对现有理论的重要检验，并解决与低温磁测量方法有关的基本问题。二是3He薄膜的磁性。薄膜磁性与3He的体磁性质有很大的不同。第三个领域是金属薄膜的输运特性和基于超导量子干涉器件的仪器的发展。这包括在介观物理的一个新领域的重要研究。各种研究项目都是基础性的，但在低温下运行的先进材料和设备的背景下可能具有技术相关性。例如，超灵敏的鱿鱼设备已被用于脑波活动产生的弱磁场的临床研究。***