Nettet1. jun. 2013 · Jifeng Qu, Horst Rogalla, Yang Fu, Jianqiang Zhang, Alessio Pollarolo, Samuel Benz Abstract A new quantum voltage calibrated Johnson noise thermometer (JNT) was developed at NIM to demonstrate the electrical approach that determines the Boltzmann constant k by comparing electrical and thermal noise power. NettetJohnson noise thermometry Pros: - pure electronic measurement of thermodynamic temperature - immune from chemical and mechanical changes in the material properties - periodic calibration is not necessary Cons: 5- extremely small voltage, 100 ohm, 273K, ~1.2nV/√Hz (amplify by 10 ) - random, very long time integration ( σ 1/ t
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Nettet1. apr. 2009 · We have developed a Johnson noise thermometry (JNT) system that is calibrated by precision waveforms synthesized with a quantized voltage noise source … Nettet23. mai 2024 · Johnson Noise Thermometer D R White-Improved electronic measurement of the Boltzmann constant by Johnson noise thermometry Jifeng Qu, Samuel P Benz, Alessio Pollarolo et al.-Recent citations Non-linearity in Johnson noise thermometry D R White-Systematic errors in the correlation method for Johnson … monarch princess riverboat
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Nettet21. apr. 2024 · A Johnson noise thermometer with traceability to electrical standards Luca Callegaro, Vincenzo D'Elia, Marco Pisani et al.-Reduced non-linearities and improved temperature measurements for the NIST Johnson noise thermometer Jifeng Qu, S P Benz, H Rogalla et al.-Zero-point term and quantum effects in the Johnson noise of … Nettet11. sep. 2013 · A quantum-voltage-calibrated Johnson-noise thermometer was developed at NIM, which measures the Boltzmann constant k by comparing the thermal noise across a 100 Ω sense resistor at the... NettetFigure 1: A simplified schematic diagram of the 2007 NIST Johnson noise thermometer using the quantized-voltage noise source as a synthetic noise reference. The QVNS … monarch pricing gun loading