Portable Self-Regulating Cryogenic Cooler for Radiation Detectors

这笔赠款用于研发一种用于辐射探测器的便携式低温冷却器。冷却器的重量将不到10公斤，配有一周的制冷剂供应，可以自我调节制冷剂消耗，以提供快速冷却或响应瞬时需求，同时在稳定运行期间保持最低消耗，不需要电力，并且没有可能造成可靠性或维护问题的关键移动部件。用于膨胀循环的液态二氧化碳可以提供低于零下75摄氏度的工作温度，并且应该具有基本上无限的保质期。研发将集中在实现良好的温度稳定性和最大限度地减少相关的高分辨率硅X射线探测器中的微声噪声。

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.