A Low Noise Thermometer Readout for Ruthenium Oxide Resistors

Details A Low Noise Thermometer Readout for Ruthenium Oxide Resistors A Low Noise Thermometer Readout for Ruthenium Oxide Resistors

2002-08-30

arxiv.org/abs/astro-ph/0208585v1

Rev.Sci.Instrum. 73 (2002) 3659-3663

Astronomy and Astrophysics

Astrophysics

5 pages text 7 figures

Scientific paper

10.1063/1.1505108

The thermometer and thermal control system, for the Absolute Radiometer for Cosmology, Astrophysics, and Diffuse Emission (ARCADE) experiment, is described, including the design, testing, and results from the first flight of ARCADE. The noise is equivalent to about 1 Omega or 0.15 mK in a second for the RuO_2 resistive thermometers at 2.7 K. The average power dissipation in each thermometer is 1 nW. The control system can take full advantage of the thermometers to maintain stable temperatures. Systematic effects are still under investigation, but the measured precision and accuracy are sufficient to allow measurement of the cosmic background spectrum. Journal-ref: Review of Scientific Instruments Vol 73 #10 (Oct 2002)

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