Acquisition of a Low Temperature and High Magnetic Field Optical Facility

购置低温高磁场光学设施

• 批准号: 9404319
• 负责人: George Gruner
• 金额: $ 12.65万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-07-01 至 1995-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9404319&HistoricalAwards=false
• 关键词: Acquisition; Low; Temperature; Magnetic; Field

A low-temperature and high-magnetic field facility is requested for combination with existing optical and quasi- optical measurement configurations to enable the exploration of electrodynamics of various novel electron states of solids. The facility is a He3 system combined with a 9T magnetic field which is provided by a split ring magnet. A conventional He3 system will be employed (together with coaxial cable and wave guide access configuration) in the radio to millimeter wave spectral range. In addition, optical access (provided by specially designed optical windows) will be provided for spectrometers operating at submillimeter wave to infrared frequencies. The facility will be used to measure the frequency dependent complex conductivity under circumstances when the energy related to the applied ac field hw , the thermal energy kT and the energy associated with the magnetic field BH can be varied over substantial ranges. Experiments will be conducted on interacting electron systems mainly in their broken symmetry ground states. %%% This research has developed a variety of measurement techniques which allow the exploration of electrodynamics of solids in an extremely broad spectral range, from audio to infrared frequencies. In this proposal, funds are requested to acquire a low-temperature and high-magnetic field facility in order to expand measurement in region and to a host of phenomenon that cannot be studied previously for metals. These facilities are used to study the properties of various novel materials having

要求使用低温和高磁场设施与现有的光学和准光学测量构型组合，以探索各种新型固体电子状态的电动力学。该设施是一个HE3系统，与9T磁场结合使用，该磁场由拆分环磁体提供。将在无线电到毫米波频谱范围内使用常规的HE3系统（以及同轴电缆和波导指南访问配置）。此外，将提供光学访问（由专门设计的光窗提供），用于在红外频率上以亚毫升波的运行为光谱仪。当与应用的AC场HW，热能KT和与磁场BH相关的能量相关的能量可以在实质范围内变化时，该设施将用于测量频率相关的复合电导率。实验将用于主要在其断裂的对称地面状态下进行的相互作用电子系统。 %% %%这项研究开发了多种测量技术，这些技术允许探索从音频到红外频率的极宽光谱范围内的固体的电动力学。在此提案中，要求资金获得低温和高磁场设施，以扩大地区的测量以及以前无法对金属进行研究的现象。这些设施用于研究具有各种新型材料的特性