Blar i USN Open Archive på forfatter "Malmbekk, Helge"
-
Characterization of high-precision resistive voltage divider and buffer amplifier for ac voltage metrology
Karlsen, Bjørnar; Lind, Kåre; Malmbekk, Helge; Øhlckers, Per (Peer reviewed; Journal article, 2019)A high-precision voltage buffer and a 10:1 resistive voltage divider have been constructed for use in ac voltage and electrical power metrology. Long-term stability of the buffer's dc response has been demonstrated by two ... -
High-Speed Pulsation of a Cryogenically Operable Bipolar Photodiode Module for the Josephson Arbitrary Waveform Synthesizer
Karlsen, Bjørnar; Bardalen, Eivind; Nissilä, Jaani; Fordell, Thomas; Kieler, Oliver; Palafox, Luis; Behr, Ralf; Malmbekk, Helge; Akram, Muhammad Nadeem; Øhlckers, Per (Peer reviewed; Journal article, 2020)This paper describes the development and testing of a prototype of a cryogenically operable bipolar photodiode module. Optical pulsation systems based on both a Mach-Zehnder modulator and a mode-locked laser have been used ... -
Reliable Packaging and Development of Photodiode Module for Operation at 4 K
Bardalen, Eivind (Doctoral dissertations at the University of South-Eastern Norway;5, Doctoral thesis, 2018)AC voltage standards based on pulse-driven Josephson junction arrays, operated at 4 K, enable quantum-accurate generation of arbitrary voltage waveforms. These devices are operated by biasing the arrays with high-frequency ...