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

低温和高磁场的设备需要与现有的光学和准光学测量配置相结合，以使各种新的固体电子态的电动力学的探索。该设施是一个氦3系统与一个9T的磁场，这是由一个分裂环磁铁提供。将在无线电至毫米波频谱范围内采用传统的He3系统（连同同轴电缆和波导接入配置）。此外，还将为工作在亚毫米波至红外频率的光谱仪提供光学通道（由专门设计的光学窗口提供）。该设备将被用来测量频率依赖的复杂的电导率的情况下，当能量相关的施加的交流场hw，热能kT和能量与磁场BH可以在很大的范围内变化。实验将主要在对称性破缺基态的相互作用电子系统上进行。 这项研究开发了各种测量技术，可以在非常宽的光谱范围内探索固体的电动力学，从音频到红外频率。该提案要求提供资金，以购置一个低温和高磁场设施，以便扩大该区域的测量范围，并扩大到以前无法对金属进行研究的一系列现象。这些设备用于研究各种新型材料的性能，