Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Tobias Bergsten"'
Autor:
Hans He, Karin Cedergren, Naveen Shetty, Samuel Lara-Avila, Sergey Kubatkin, Tobias Bergsten, Gunnar Eklund
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-9 (2022)
The 2019 redefinition of the International System of Units requires a 100 Ω quantum resistance standard for the ideal electrical realization of the kilogram via the Kibble Balance. Here, the authors report the realization of an array of 236 graphene
Externí odkaz:
https://doaj.org/article/cb4cad8b248b48d9a292730efafe933c
Autor:
Enis Turhan, Ömer Erkan, Cem Hayirli, Daniela Istrate, Tibor Németh, Oliver Power, Luis Ribeiro, Tobias Bergsten, David Corminboeuf
Publikováno v:
Metrologia. 60:01002
Main text Comparison for ultra-low DC current sources between LNE (France), BFKH (Hungary), NSAI NML (Ireland), IPQ (Portugal), RISE (Sweden), METAS (Switzerland) and TÜBİTAK UME (Turkey). To reach the main text of this paper, click on Final Report
Publikováno v:
Proceedings of the 25th IMEKO TC4 International Symposium and 23rd International Workshop on ADC and DAC Modelling and Testing.
Autor:
Tobias Bergsten, Karl-Erik Rydler
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 68:2041-2046
This paper presents a simplified method for realizing absolute phase and ac resistance for current shunts using only impedance ratio measurements. The method is based on three geometrically identical current shunts with different resistances, but wit
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 68:1860-1869
This paper describes a new four-terminal pair (4TP) digital sampling impedance bridge designed for the frequency range up to 1MHz and small impedances, such as shunts. The bridge is capable of comparing impedance standards of arbitrary ratios in a fu
Autor:
Antti Manninen, Sivinee Sawatdiaree, S. Bauer, J. Nissila, Frederic Overney, Adrien Michon, Yaowaret Pimsut, Yefei Yin, Dong-Hun Chae, Blaise Jeanneret, Klaus Pierz, Martina Marzano, Massimo Ortolano, Mattias Kruskopf, Karin Cedergren, Félicien Schopfer, Tobias Bergsten, O. Thevenot, Luca Callegaro, Vincenzo D'Elia, Jan Kucera, Ngoc Thanh Mai Tran
Publikováno v:
Callegaro, L, D'Elia, V, Marzano, M, Tran, N T M, Ortolano, M, Kucera, J, Pierz, K, Bauer, S, Kruskopf, M, Yin, Y, Pimsut, Y, Schopfer, F, Thevenot, O, Jeanneret, B, Overney, F, Bergsten, T, Cedergren, K, Manninen, A, Nissilä, J, Michon, A, Sawatdiaree, S & Chae, D H 2020, The EMPIR Project GIQS : Graphene Impedance Quantum Standard . in 2020 Conference on Precision Electromagnetic Measurements, CPEM 2020 . IEEE Institute of Electrical and Electronic Engineers, 2020 Conference on Precision Electromagnetic Measurements, CPEM 2020, Virtual, Denver, United States, 24/08/20 . https://doi.org/10.1109/CPEM49742.2020.9191743
GIQS: Graphene Impedance Quantum Standard is a Joint Research Project of the European Metrology Programme for Innovation and Research (EMPIR). The project objective is to combine novel digital impedance measurement bridges with graphene-based ac quan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::22248dc56c425eb5e74035479ccee606
http://hdl.handle.net/11583/2845733
http://hdl.handle.net/11583/2845733
Autor:
Rositza Yakimova, Hans He, Tobias Bergsten, Gunnar Eklund, Sergey Kubatkin, Samuel Lara-Avila, Kyung Ho Kim, Yung Woo Park
Publikováno v:
2018 Conference on Precision Electromagnetic Measurements (CPEM 2018).
Here we demonstrate a stable and tunable method to alter the carrier concentration of epitaxial graphene grown on silicon carbide. This technique relies on chemical doping by an acceptor molecule. Through careful tuning one can produce chemically dop
Publikováno v:
2018 Conference on Precision Electromagnetic Measurements (CPEM 2018).
The Reference Step Method for calibrators can be modified for calibration also of the gain ratios on a meter. The method has earlier been evaluated in the range 100 mV – 1000 V on DMM HP 3458A1 and shows that an accuracy of typically $ could be obt
Publikováno v:
2018 Conference on Precision Electromagnetic Measurements (CPEM 2018).
This paper describes a method for realisation of inductance and quality factor to high frequencies by determining the frequency response of gain-and phase-error of an inductance meter using two coils made of a single copper wire. As a starting point
Autor:
Tobias Bergsten, Frank Hohls, C.-C. Kalmbach, Rolf J. Haug, F. J. Ahlers, Klaus Pierz, A. Müller, Mattias Kruskopf, Jürgen Schurr
Publikováno v:
Physical Review B. 96
We investigate the properties of the magnetocapacitance and dissipation factor of epitaxial graphene Hall bars with different electrode configurations to gain insight into the underlying physical mechanisms. The dependence of magnetocapacitance and d