A Microkelvin Magnetic Flux Noise Thermometer
作者： D. Rothfuß , A. Reiser , A. Fleischmann , C. Enss
DOI: 10.1007/S10909-014-1146-0
关键词:
摘要: Due to its non-driven nature, noise thermometry intrinsically is the method of choice when minimal heat input during temperature measurement required. Our thermometer, experimentally characterized for temperatures between 42 \({{\upmu }}\)K and 0.8 K, a magnetic Johnson thermometer. The source cold-worked high purity copper cylinder, 5 mm in diameter 20 long. flux fluctuations generated by electrons’ Brownian motion measured inductively two dc-SQUID magnetometers simultaneously. Cross-correlation channels leads reduction parasitic more than one order magnitude which allows measuring tiny powers at microkelvin temperatures.
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