Current Sensing Noise Thermometry: A Fast Practical Solution to Low Temperature Measurement
Current Sensing Noise Thermometry: A Fast Practical Solution to Low Temperature Measurement
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DOI：
10.1007/s10909-014-1147-z
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发表时间：
2014-06-01
影响因子：
2
通讯作者：
Matthews, A. J.
中科院分区：
文献类型：
--
作者：
Casey, A.;Arnold, F.;Matthews, A. J.
我们描述了一系列快速、精确的电流感测噪声温度计的设计和性能。温度计的电阻范围从1.290到0.2m。这要么产生了利用超导量子干涉设备噪声和带宽改进的速度优化的温度计，要么产生了优化的超低温测量温度计，将系统噪声温度降至最低。结果表明，噪声温度计可以在4K以下的较宽温度范围内进行精确测量，并与熔化曲线温度计、刻度锗温度计和脉冲铂核磁共振温度计进行了比较。对于1.290的电阻，我们仅在100ms内测量了1%的精度，并且已经证明这与温度无关。
We describe the design and performance of a series of fast, precise current sensing noise thermometers. The thermometers have been fabricated with a range of resistances from 1.290 down to 0.2 m. This results in either a thermometer that has been optimised for speed, taking advantage of the improvements in superconducting quantum interference device noise and bandwidth, or a thermometer optimised for ultra-low temperature measurement, minimising the system noise temperature. With a single temperature calibration point, we show that noise thermometers can be used for accurate measurements over a wide range of temperatures below 4 K. Comparisons with a melting curve thermometer, a calibrated germanium thermometer and a pulsed platinum nuclear magnetic resonance thermometer are presented. For the 1.290 resistance we measure a 1 % precision in just 100 ms, and have shown this to be independent of temperature.