MRI Devlopment: Development of an Optical NanoKelvin Calorimeter

该奖项支持开发具有纳米开尔文分辨率的光学量热计，估计将现有激光量热计的灵敏度提高三个数量级以上，这将推动光学吸收测量的最新技术从0.1到1 ppm（百万分之一）到ppb（十亿分之一）区域。这将允许以前所未有的灵敏度表征光学元件。 光谱分辨率和测量在3 K结合空间分辨率将产生独特的信息的物理和化学性质的本地和激光诱导的材料缺陷，这是必要的缓解策略的发展。新仪器将能够精确研究低温探测器中使用的材料的光学/红外吸收率，具有光谱，功率和空间分辨率，包括吸附表面污染的影响。这将提供关于顺磁伽马射线/粒子探测器的位置相关响应的信息，这将导致更低的操作温度以提高性能。

This award supports the development of an optical calorimeter with nanoKelvin resolution which is estimated to improve upon the sensitivity of current laser calorimeters by more than three orders of magnitude, which will push the state-of-the-art in optical absorption measurements of 0.1 to 1 ppm (parts per million) to the ppb (parts per billion)region. This will allow the characterization of optical components with unprecedented sensitivity. Spectral resolution and measurements at 3 K combined with spatial resolution will yield unique information about the physical and chemical nature of native and laser induced material defects, which is necessary for the development of mitigation strategies. The new instrument will enable precision studies of optical/IR absorbance of materials used in low-temperature detectors with spectral, power, and spatial resolution, including the impact of adsorbed surface contamination. This will provide information on the position-dependent response of paramagnetic gamma-ray/particle detectors, which will result in lower operating temperatures for improved performance.