| Autor: |
Völksen, F., Devlin, J. A., Borchert, M. J., Erlewein, S. R., Fleck, M., Jäger, J. I., 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. |
| Předmět: |
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| Zdroj: |
Review of Scientific Instruments; 9/1/2022, Vol. 93 Issue 9, p1-6, 6p |
| Abstrakt: |
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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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