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我们报导了用电阻式 SQUID 器件样品所进行的实验。实验证明,在0.01～0.52K 范围内,这种器件既可作为原级噪声温度计使用,也可作为次级电阻温度计使用。电路中的电阻器是用一种含0.5%铁的铑合金制成的。在这一温区内,此种合金的电阻率与温度有明显的依赖关系。SQUID的灵敏度很高,可以在不考虑热量耗散的情况下,对电阻进行准确地测量。由于绝对温度的值可以由噪声测温法得到,该器件实际上是一种自校的电阻温度计。一般说来,这两种器件的组合,是测温学中的一种罕见的事物,在这一温度范围内,可能是唯一的。这样一种新型的温度计已经制造出来,并在0.01～0.52K 的范围内,进行了试验。本文介绍了用这种样品进行实验的结果,考虑了它的局限性,并简要介绍了它的改进方法。
We report on experiments with samples of resistive SQUID devices. Experiments show that in the range of 0.01 ~ 0.52K, this device can be used as a primary noise thermometer, but also as a secondary resistance thermometer. The resistor in the circuit is made of a rhodium alloy containing 0.5% iron. In this temperature zone, the resistivity of this alloy has a clear dependence on temperature. The SQUID’s high sensitivity allows accurate measurement of resistance without regard to heat dissipation. As the absolute temperature value can be obtained by noise temperature measurement, the device is actually a self-school resistance thermometer. In general, the combination of these two devices is a rare event in temperature measurement that may be unique in this temperature range. Such a new type of thermometer has been manufactured and tested in the 0.01-0.52K range. This article describes the results of experiments with this sample, considers its limitations, and briefly describes its improvements.