A high-Q superconducting toroidal medium frequency detection system with a capacitively adjustable frequency range > 180 kHz

verfasst von
F. Völksen, J. A. Devlin, M. J. Borchert, S. R. Erlewein, M. Fleck, J. I. Jäger, B. M. Latacz, P. Micke, P. Nuschke, G. Umbrazunas, E. J. Wursten, F. Abbass, M. A. Bohman, D. Popper, M. Wiesinger, C. Will, K. Blaum, Y. Matsuda, A. Mooser, C. Ospelkaus, C. Smorra, A. Soter, W. Quint, J. Walz, Y. Yamazaki, S. Ulmer
Abstract

We describe a newly developed polytetrafluoroethylene/copper capacitor driven by a cryogenic piezoelectric slip-stick stage and demonstrate with the chosen layout cryogenic capacitance tuning of ≈60 pF at ≈10 pF background capacitance. Connected to a highly sensitive superconducting toroidal LC circuit, we demonstrate tuning of the resonant frequency between 345 and 685 kHz, at quality factors Q > 100 000. Connected to a cryogenic ultra low noise amplifier, a frequency tuning range between 520 and 710 kHz is reached, while quality factors Q > 86 000 are achieved. This new device can be used as a versatile image current detector in high-precision Penning-trap experiments or as an LC-circuit-based haloscope detector to search for the conversion of axion-like dark matter to radio-frequency photons. This new development increases the sensitive detection bandwidth of our axion haloscope by a factor of ≈1000.

Organisationseinheit(en)
Institut für Quantenoptik
QuantumFrontiers
SFB 1227: Designte Quantenzustände der Materie (DQ-mat)
Externe Organisation(en)
GSI Helmholtzzentrum für Schwerionenforschung GmbH
Physikalisch-Technische Bundesanstalt (PTB)
Max-Planck-Institut für Kernphysik
University of Tokyo (UTokyo)
ETH Zürich
Johannes Gutenberg-Universität Mainz
CERN - Europäische Organisation für Kernforschung
Ulmer Fundamental Symmetries Laboratory
Helmholtz-Institut Mainz
Typ
Artikel
Journal
Review of scientific instruments
Band
93
ISSN
0034-6748
Publikationsdatum
09.2022
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Instrumentierung
Elektronische Version(en)
https://doi.org/10.1063/5.0089182 (Zugang: Offen)