A high-Q superconducting toroidal medium frequency detection system with a capacitively adjustable frequency range > 180 kHz
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.
Details
- Organisationseinheit(en)
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Institut für Quantenoptik
QuantumFrontiers
SFB 1227: Designte Quantenzustände der Materie (DQ-mat)
- Externe Organisation(en)
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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
)
