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

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

doi:10.1063/5.0089182

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

MPG-Autoren

/persons/resource/persons199654

Jäger, Julia
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons268470

Wursten, E. J.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons204546

Bohman, M. A.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Wiesinger, M.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Blaum, K.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons223857

Mooser, A.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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https://aip.scitation.org/doi/pdf/10.1063/5.0089182
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Zitation

Völksen, F., Devlin, J. A., Borchert, M. J., Erlewein, S. R., Fleck, M., Jäger, J., et al. (2022). A high-Q superconducting toroidal medium frequency detection system with a capacitively adjustable frequency range >180 kHz. Review of Scientific Instruments, 93: 093303. doi:10.1063/5.0089182.

Zitierlink: https://hdl.handle.net/21.11116/0000-000B-0896-3

Zusammenfassung

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.