Zobrazeno 1 - 10
of 345
pro vyhledávání: '"Horst Rogalla"'
Autor:
John Gallop, Horst Rogalla
Publikováno v:
Handbook of Superconductivity ISBN: 9781003139638
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d68e0c246016feceb0e2cd1d21f5568b
https://doi.org/10.1201/9781003139638-43
https://doi.org/10.1201/9781003139638-43
Publikováno v:
IEEE Transactions on Applied Superconductivity. 30:1-5
Microwave-driven Josephson junction arrays are the basis for dc and ac voltage standards, whose accuracy derives from quantized voltage pulses. These pulses are also used to synthesize voltage-noise reference signals that are used in noise thermometr
Autor:
Weston L. Tew, Jifeng Qu, Rod White, Kevin J. Coakley, Kunli Zhou, Samuel P. Benz, Zhenyu Zhou, Horst Rogalla
Publikováno v:
Metrologia. 54:549-558
Recent measurements using acoustic gas thermometry have determined the value of the Boltzmann constant, k, with a relative uncertainty less than 1 × 10−6. These results have been supported by a measurement with a relative uncertainty of 1.9 × 10
Autor:
Horst Rogalla, Nathan E. Flowers-Jacobs, Samuel P. Benz, S.A. Cybart, Adam C. Weis, Ethan Y. Cho, Hao Li, S. Berkowitz, J.C. LeFebvre
Publikováno v:
2019 IEEE International Superconductive Electronics Conference (ISEC).
Josephson junction arrays are the basis for quantum-accurate dc and ac voltage standards, including artificial voltage-noise references used in noise thermometry. I will describe our recent progress towards voltage synthesis using high-transition-tem
Publikováno v:
Measurement Science and Technology. 30:112001
Autor:
Kevin J. Coakley, Alessio Pollarolo, Nathan E. Flowers-Jacobs, Horst Rogalla, Anna E. Fox, Weston L. Tew, Samuel P. Benz, Adam C. Weis
Publikováno v:
J Res Natl Inst Stand Technol
In preparation for the redefinition of the International System of Units (SI), five different electronic measurements of the Boltzmann constant have been performed using different Johnson noise thermometry (JNT) systems over the past seven years. In
Autor:
J.H. Derking, Johannes Faas Burger, Horst Rogalla, Marcel ter Brake, P.P.P.M. Lerou, H.J. Holland
Publikováno v:
International Conference on Space Optics, ICSO 2008, 10566
The performance of electronic devices can often be improved by lowering the operating temperature resulting in lower noise and larger speed. Also, new phenomena can be applied at low temperatures, as for instance superconductivity. In order to fully
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0a9febe26003f584954d140f7af82f7a
https://research.utwente.nl/en/publications/b03015a2-2c6b-4d51-9d72-3c4557beef7a
https://research.utwente.nl/en/publications/b03015a2-2c6b-4d51-9d72-3c4557beef7a
Publikováno v:
IEEE Transactions on Applied Superconductivity. 25:1-7
The effective constitutive parameters of a hightemperature superconducting (HTS) metamaterial are extracted from measured scattering parameters at liquid nitrogen temperature (≈75.68 K at the National Institute of Standards and Technology, Boulder,
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 62:1512-1517
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 $\Omega$ resistor at the triple point of water and used a voltage waveform synthesiz
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 62:1518-1523
A new quantum-voltage-calibrated Johnson noise thermometer was developed at the National Institute of Metrology to demonstrate the electrical approach that determines Boltzmann's constant $k$ , by comparing electrical and thermal noise power. A measu