Noise Measurements of a Low-Noise Amplifier in the FDM Readout System for SAFARI

Noise Measurements of a Low-Noise Amplifier in the FDM Readout System for SAFARI

Wang, Qian (SRON Netherlands Institute for Space Research; Rijksuniversiteit Groningen)
Audley, Michael D. (SRON Netherlands Institute for Space Research)
Khosropanah, Pourya (SRON Netherlands Institute for Space Research)
van der Kuur, Jan (SRON Netherlands Institute for Space Research)
de Lange, Gert (SRON Netherlands Institute for Space Research)
Aminaei, Amin (SRON Netherlands Institute for Space Research)
Boersma, Dick (SRON Netherlands Institute for Space Research)
van der Tak, Floris (SRON Netherlands Institute for Space Research; Rijksuniversiteit Groningen)
Gao, J. (TU Delft QN/Gao Lab; SRON Netherlands Institute for Space Research)

2020

The SPICA-SAFARI instrument requires extremely sensitive transition edge sensor (TES) arrays with a noise equivalent power of 2×10-19W/Hz and a readout system with an output noise that is dominated by the detector noise. It is essential to ensure the frequency domain multiplexing (FDM) readout system in SAFARI meets the noise requirement. The FDM system in SAFARI consists essentially of LC filters, a superconducting quantum interference device, a room-temperature low-noise amplifier (LNA), and a demultiplexer. Here we present a noise study of the LNA from a laboratory amplifier chain. We found the equivalent current and voltage noise of the LNA to be 5.4pA/Hz and 315pV/Hz, respectively, which are low enough to read out SAFARI’s TES arrays.

Low-noise amplifier
Readout noise
SQUID
Transition edge sensor

http://resolver.tudelft.nl/uuid:51dc014d-5b26-4a03-8eca-a3e5f7f6485a

https://doi.org/10.1007/s10909-019-02328-x

0022-2291

Journal of Low Temperature Physics, 199 (3-4), 817-823

Institutional Repository

journal article

© 2020 Qian Wang, Michael D. Audley, Pourya Khosropanah, Jan van der Kuur, Gert de Lange, Amin Aminaei, Dick Boersma, Floris van der Tak, J. Gao