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
- Organisation(s)
-
Institute of Quantum Optics
QuantumFrontiers
CRC 1227 Designed Quantum States of Matter (DQ-mat)
- External Organisation(s)
-
GSI Helmholtz Centre for Heavy Ion Research
Physikalisch-Technische Bundesanstalt PTB
Max Planck Institute for Nuclear Physics
University of Tokyo
ETH Zurich
Johannes Gutenberg University Mainz
CERN
Ulmer Fundamental Symmetries Laboratory
Helmholtz-Institut Mainz
- Type
- Article
- Journal
- Review of scientific instruments
- Volume
- 93
- ISSN
- 0034-6748
- Publication date
- 09.2022
- Publication status
- Published
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- Instrumentation
- Electronic version(s)
-
https://doi.org/10.1063/5.0089182 (Access:
Open
)
