Pulsed tube Cryo-cooler with integrated Knudsen micropump

冷冻冷却器是用于不同科学和工业应用的通用系统，从生物学和医学的样品制备到科学和工业中的传感器应用。为此，对脉冲管冷却器（PTC）进行了实验研究。然而，由于需要机械泵和PTC的组合，整个系统会产生振动，这使得PTC很难应用于任何类型的传感器系统。Knudsen微型泵的开发，没有运动部件，没有任何振动，能够与小型化的PTC结合运行，通过消除测量的热背景噪声，将大大提高测量的可能性。传感器可以像样品一样冷却到非常低的温度。可以降低信噪比，从而显著提高整个分析系统的灵敏度。这可以增强红外线和其他光学传感器，以及微型核磁共振系统，在非常小的设备中应用过冷线圈来获得高磁场。

Cryo-coolers are versatile systems for different scientific and industrial applications, ranging from sample preparation in biology and medicine to application of sensors in science and industry. For these objec-tives, pulsed tube coolers (PTC) have been experimentally investigated. However, due to the needed combination of mechanic pumps and PTC, vibrations are brought into the total system, which makes it hard to apply PTC to any type of sensor system. The development of a Knudsen micropump, with no moving parts and without any vibration, being able to run in combination with a miniaturized PTC will en-hance measurement possibilities dramatically by removing the thermal background noise of measure-ments. Sensors can be cooled down to very low temperatures as well as the samples can. Signal over noise ratio can be reduced, and sensitivity of the whole analytical system can thus be increased signifi-cantly. This could allow enhanced infrared and other optical sensors as well as micro nuclear magnetic resonance systems applying supercooled coils for high magnetic fields in very small devices.