Towards a Micro milliKelvin Cooler Array

该应用旨在通过演示新概念来演示4K至毫开尔文的微冷却器。低温冷冻一直是一个相对大规模的技术，即稀释制冷机和绝热退磁制冷机（ADR）。MSSL在毫开尔文低温制冷机（mKCC），固态热开关和磁体设计方面的最新进展实现了在4 K至毫开尔文区域内冷却的新概念，从而能够大幅减小尺寸。例如，在100 mK下提供1 uW冷却功率的mKCC可以通过使用新的微冷却器概念从5.6（d）x 12（w）x 30（h）cm减小到4（d）x 5（w）x 5（h）cm的尺寸。这种毫开尔文微冷却器与更高温度微冷却器的最终耦合提供了完整的300 K至100毫开尔文微冷却器的前景，该微冷却器可用于冷却非常紧凑的便携式系统中的最先进的低温探测器（例如微波动力学电感探测器MKID）和量子计算机。在这个应用程序中，我们寻求资金来证明这一概念，通过构建一个小型原型系统，将有一个连续的100 mK的冷却功率为0.3 uW，当在4 K接口和预测的尺寸只有3 × 2 × 5厘米。这一概念使得能够非常容易地适应更高的冷却功率和更低的温度。

This application seeks to demonstrate a 4 K to millikelvin micro cooler through the demonstration of a new concept. Low temperature cryogenics has always been a relatively large scale technology i.e. dilution refrigerators and adiabatic demagnetisation refrigerators (ADR). Recent advances at MSSL in the millikelvin cryocooler (mKCC), solid state heat switches and magnet design enables a new concept of cooling in the 4 K to millikelvin region which enables a dramatic reduction in size. For example, the mKCC which provides 1 uW of cooling power at 100 mK, could be reduced from 5.6 (d) x 12 (w) x 30 (h) cm to a size of 4 (d) x 5 (w) x 5 (h) cm by using the new micro cooler concept. The ultimate coupling of this millikelvin micro cooler to higher temperature micro coolers, offers the prospect of a complete 300 K to 100 millikelvin micro cooler that could be used to cool state-of-the-art cryogenic detectors (e.g. Microwave Kinetic Inductance Detectors MKIDs) and quantum computers in a very compact, portable system. In this application we seek the funds to demonstrate this concept by constructing a small prototype system which will have a continuous 100 mK cooling power of 0.3 uW, when interfaced at 4 K and have predicted dimensions of only 3 x 2 x 5 cm. This concept enables very easy adaptation for higher cooling powers and lower temperatures.