Portable Self-Regulating Cryogenic Cooler for Radiation Detectors

这项拨款资助研发便携式低温冷却器 用于辐射探测器。 冷却器的重量将小于10 kg，并提供一周的冷冻剂， 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 稳定状态运行期间的消耗，无需 电力，并且没有关键的移动部件， 可能造成可靠性或维护问题。 液体 用于膨胀循环的二氧化碳可以提供 工作温度低于零下75摄氏度，并应具有 基本上是无限的保质期。 研发将集中在 实现良好的温度稳定性， 高分辨硅X射线中的颤噪噪声 检测器

This grant funds R&D toward a portable cryogenic cooler for radiation detectors. The cooler would weigh less than 10 kg complete with a one week supply of cryogen, be self regulating in cryogen consumption to provide rapid cool down or response to transient demands while maintaining minimum consumption during steady state operation, require no electrical power, and have 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 R&D will be focussed on achieving good temperature stability and on minimizing microphonic noise in the associated high resolution Si X-Ray Detector.