Johnson Noise Thermometry Measurement of the Boltzmann Constant With a 200 Sense Resistor

Pollarolo, A.,Taehee Jeong,Benz, S.P.,Rogalla, H.

IEEE T. Instrumentation and Measurement（2013）

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摘要

In 2010, the National Institute of Standards and Technology measured the Boltzmann constant k with an electronic technique that measured the Johnson noise of a 100 Ω resistor at the triple point of water and used a voltage waveform synthesized with a quantized voltage noise source (QVNS) as a reference. In this paper, we present measurements of k using a 200 Ω sense resistor and an appropriately modified QVNS circuit and waveform. Preliminary results show agreement with the previous value within the statistical uncertainty. An analysis is presented, where the largest source of uncertainty is identified, which is the frequency dependence in the constant term a0 of the two-parameter fit.

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关键词

constants,measurement uncertainty,noise measurement,resistors,thermal noise,thermometers,waveform generators,Boltzmann constant,Johnson noise thermometry measurement,National Institute of Standards and Technology,electronic technique,modified QVNS circuit,modified QVNS waveform,quantized voltage noise source,resistance 200 ohm,sense resistor,statistical uncertainty,two-parameter fit,voltage waveform synthesis,water triple point,Boltzmann equation,Josephson junction,measurement units,noise measurement,standards,temperature

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