6533b839fe1ef96bd12a5af8
RESEARCH PRODUCT
A high-Q superconducting toroidal medium frequency detection system with a capacitively adjustable frequency range >180 kHz
F. VölksenJ. A. DevlinM. J. BorchertS. R. ErleweinM. FleckJ. I. JägerB. M. LataczP. MickeP. NuschkeG. UmbrazunasE. J. WurstenF. AbbassM. A. BohmanD. PopperM. WiesingerC. WillK. BlaumY. MatsudaA. MooserC. OspelkausC. SmorraA. SoterW. QuintJ. WalzY. YamazakiS. Ulmersubject
Speichertechnik - Abteilung BlaumDetectors and Experimental TechniquesInstrumentationdescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2022-10-01 | Review of Scientific Instruments |