Spectral Engineering for Optimal Signal Performance in the Microwave SQUID Multiplexer
Salum, J. M. 1; García Redondo, M. E. 1; Ferreyro, L. P. 1; Bonilla-Neira, J. 2; Müller, N. 2; Geria, J. M. 2; Bonaparte, J. 1; Muscheid, T.
1; Gartmann, R.
1; Fuster, A.; Almela, A.; Hampel, M. R.; Ardila-Perez, L. E.
1; Sander, O. 1; Kempf, S. 1,2; Platino, M.; Weber, M. 1,2; Etchegoyen, A.
1 Institut für Prozessdatenverarbeitung und Elektronik (IPE), Karlsruher Institut für Technologie (KIT)
2 Institut für Mikro- und Nanoelektronische Systeme (IMS), Karlsruher Institut für Technologie (KIT)
1; Gartmann, R.
1; Fuster, A.; Almela, A.; Hampel, M. R.; Ardila-Perez, L. E.
1; Sander, O. 1; Kempf, S. 1,2; Platino, M.; Weber, M. 1,2; Etchegoyen, A.1 Institut für Prozessdatenverarbeitung und Elektronik (IPE), Karlsruher Institut für Technologie (KIT)
2 Institut für Mikro- und Nanoelektronische Systeme (IMS), Karlsruher Institut für Technologie (KIT)
Abstract:
We describe a technique to optimize the dynamic performance of microwave
SQUID multiplexer (μMUX)-based systems. These systems proved to be adequate
for reading out multiple cryogenic detectors simultaneously. However, the require-
ment for denser detector arrays to increase the sensitivity of scientific experiments
makes its design a challenge. When modifying the readout power, there is a trade-
off between decreasing the signal-to-noise ratio (SNR) and boosting the nonlineari-
ties of the active devices. The latter is characterized by the spurious free dynamic
range (SFDR) parameter and manifests as an increment in the intermodulation prod-
ucts and harmonics power. We estimate the optimal spectral location of the SQUID
signal containing the detector information for different channels. Through the tech-
nique, what we refer to as Spectral Engineering, it is possible to minimize the SNR
degradation while maximizing the SFDR of the detector signal, thus, overcoming
the trade-off.
SQUID multiplexer (μMUX)-based systems. These systems proved to be adequate
for reading out multiple cryogenic detectors simultaneously. However, the require-
ment for denser detector arrays to increase the sensitivity of scientific experiments
makes its design a challenge. When modifying the readout power, there is a trade-
off between decreasing the signal-to-noise ratio (SNR) and boosting the nonlineari-
ties of the active devices. The latter is characterized by the spurious free dynamic
range (SFDR) parameter and manifests as an increment in the intermodulation prod-
ucts and harmonics power. We estimate the optimal spectral location of the SQUID
signal containing the detector information for different channels. Through the tech-
nique, what we refer to as Spectral Engineering, it is possible to minimize the SNR
degradation while maximizing the SFDR of the detector signal, thus, overcoming
the trade-off.
| Zugehörige Institution(en) am KIT | Institut für Mikro- und Nanoelektronische Systeme (IMS) Institut für Prozessdatenverarbeitung und Elektronik (IPE) |
| Publikationstyp | Zeitschriftenaufsatz |
| Publikationsjahr | 2024 |
| Sprache | Englisch |
| Identifikator | ISSN: 0022-2291, 1573-7357 KITopen-ID: 1000168292 |
| Erschienen in | Journal of Low Temperature Physics |
| Verlag | Springer |
| Band | 214 |
| Vorab online veröffentlicht am | 01.02.2024 |
| Nachgewiesen in | Dimensions Web of Science Scopus |