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Publication Citation: Development of a Four-channel System for Johnson Noise Thermometry

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Author(s): Alessio Pollarolo; Jifeng Qu; Horst Rogalla; Paul D. Dresselhaus; Samuel P. Benz;
Title: Development of a Four-channel System for Johnson Noise Thermometry
Published: June 13, 2010
Abstract: Long integration time is necessary to reach low uncertainty when measuring temperature through Johnson Noise Thermometry (JNT). The main goal of the NIST JNT experiment is to achieve a 6 10-6 relative uncertainty in the measurement of the water triple point, which could contribute to the re determination of Boltzmann s constant. A four-channel JNT system, which will reduce the measurement time two-fold, is being developed with new components, including a switchboard, an analog-digital converter (ADC) and a programmable, recharging power supply system. While implementing the new ADC, a source of systematic error was revealed, as well as a means to increase the measurement bandwidth.
Conference: Conference on Precision Electromagnetic Measurements
Proceedings: Conference on Precision Electromagnetic Measurements Conference Digest
Pages: pp. 490 - 491
Location: Daejon, -1
Dates: June 13-18, 2010
Keywords: Thermometry; Johnson Noise; Josephson arrays;
Research Areas: Quantum Electrical Measurements, Johnson Noise Thermometry
PDF version: PDF Document Click here to retrieve PDF version of paper (437KB)