Resistance Thermometer Bridge for Measurement of Temperatures in the Liquid Helium Range
作者:
C. Blake,
C. E. Chase,
E. Maxwell,
期刊:
Review of Scientific Instruments
(AIP Available online 1958)
卷期:
Volume 29,
issue 8
页码: 715-716
ISSN:0034-6748
年代: 1958
DOI:10.1063/1.1716305
出版商: AIP
数据来源: AIP
摘要:
A 33‐cps resistance thermometer bridge, suitable for precise temperature measurements in the liquid helium range, has been designed as a completely self‐contained unit. The amplifier has a gain of 120 db, band width of 0.3 cps, and input impedance of 10 kohms. With a power dissipation of 2×10−8watts in the thermometer, resistance changes of 0.1 ohm can be detected. For a typical resistance thermometer this corresponds to a temperature change of 4×10−6°K at 2°K. Other features include high rejection of line‐frequency pickup, short recovery time after saturation, and a combination gain band‐width control which shortens the response time during preliminary balancing operations.
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