Portable X-Ray Energy Spectrometer with Self-Regulating Cryogenic Cooler

带自调节低温冷却器的便携式 X 射线能谱仪

• 批准号: 8914369
• 负责人: John Walter
• 金额: $ 24.2万
• 依托单位: IntraSpec Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-09-15 至 1993-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8914369&HistoricalAwards=false
• 关键词: Portable; Ray; Energy; Spectrometer; Self

This grant supports development of a portable x-ray energy spectrometer consisting of a cryogenic cooler and hyperpure Si detector. The cooling unit weighs less than 10 kg complete with a one week supply of cryogen, is self regulating in cryogen consumption to provide rapid cool down or response to transient demands while maintaining minimum consumption during steady state operation, requires no electrical power, and has no critical moving parts which could pose reliability or maintenance problems. The liquid carbon dioxide used for the expansion cycle can provide an operating temperature below minus 75 Celsius and should have an essentially infinite shelf life. The project will concentrate on improving the design of the cooler, development of a hyperpure Si detector, and development of a complete detector/cooler prototype portable x-ray spectrometer. It is expected that this development will open the door to a large market for a new generation of highly portable, rugged, and economical low noise x-ray, nuclear, optical, and infrared detector systems which can be stored indefinitely and then restarted quickly.

这项拨款支持便携式X射线能量的开发 由低温冷却器和超纯Si组成的光谱仪 检测器 整个冷却装置的重量不到10公斤 一个星期的冷冻剂供应，是自我调节， 制冷剂消耗以提供快速冷却或响应 瞬态需求，同时保持最低消耗， 稳态操作，不需要电力，并且具有 无可能影响可靠性的关键活动部件，或 维护问题。 液态二氧化碳用于 膨胀循环可提供低于 零下75摄氏度，应该有一个基本上无限的货架 生活 该项目将集中于改进 冷却器，超纯硅探测器的开发，以及 便携式完整探测器/冷却器原型的开发 X射线光谱仪 预计这一发展将 为新一代高科技产品打开了一扇巨大的市场之门。 便携、坚固和经济的低噪声X射线，核能， 光学和红外探测器系统， 无限期地，然后迅速重新启动。