| Author(s): |
Pollarolo, A.; Jeong, T. H.; Benz, S. P.; Rogalla, H.; |
| Title: |
Johnson Noise Thermometry Measurement of the Boltzmann Constant with a 200 Ohm Sense Resistor |
| Published: |
July 01, 2012 |
| Abstract: |
In 2010 NIST measured the Boltzmann constant k by use of an electronic technique that measured the Johnson noise of a 100 Ohm resistor at the triple point of water (TPW). The NIST Johnson noise thermometry (JNT) system used as a reference a voltage waveform that was synthesized with a quantum voltage noise source (QVNS) that consisted of pulse-driven arrays of Josephson-junctions. In this paper, we attempt to reproduce the previous measurement of k by repeating the JNT measurement with a 200 Ohm sense resistor and appropriately modified QVNS circuit and waveform. Preliminary results show agreement with the previous value within the measurement uncertainty. |
| Conference: |
Conference on Precision Electromagnetic Measurements |
| Proceedings: |
Conference on Precision Electromagnetic Measurements Conference Digest |
| Volume: |
28 |
| Pages: |
pp. 214 - 215 |
| Location: |
National Harbor, MD |
| Dates: |
July 1-6, 2012 |
| Keywords: |
Boltzmann equation; Correlation; Digital-analog conversion; Josephson arrays; Measurement units; Noise Measurement; Quantization; Signal synthesis; Standards; Temperature. |
| Research Areas: |
Instrumentation, Johnson Noise Thermometry, Quantum Devices, Thermometry, Quantum Electrical Measurements, Measurements |
| PDF version: |
 Click here to retrieve PDF version of paper (1817 K) |
