Völksen, F;
Devlin, JA;
Borchert, MJ;
Erlewein, SR;
Fleck, M;
Jäger, JI;
Latacz, BM;
... Ulmer, S; + view all
(2022)
A high-Q superconducting toroidal medium frequency detection system with a capacitively adjustable frequency range >180 kHz.
Review of Scientific Instruments
, 93
(9)
, Article 093303. 10.1063/5.0089182.
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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 [Formula: see text] pF at [Formula: see text] 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 [Formula: see text].
| Type: | Article |
|---|---|
| Title: | A high-Q superconducting toroidal medium frequency detection system with a capacitively adjustable frequency range >180 kHz |
| Location: | United States |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1063/5.0089182 |
| Publisher version: | https://doi.org/10.1063/5.0089182 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10157090 |
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