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

The SPICA-SAFARI instrument requires extremely sensitive transition edge sensor (TES) arrays with a noise equivalent power of 2 × 10 - 19 W/ 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...

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Bibliographic Details
Published inJournal of low temperature physics Vol. 199; no. 3-4; pp. 817 - 823
Main Authors Wang, Qian, Audley, Michael D., Khosropanah, Pourya, van der Kuur, Jan, de Lange, Gert, Aminaei, Amin, Boersma, Dick, van der Tak, Floris, Gao, Jian-Rong
Format Journal Article
LanguageEnglish
Published New York Springer US 01.05.2020
Springer Nature B.V
Subjects
Amplifiers
Characterization and Evaluation of Materials
Condensed Matter Physics
Equivalence
Frequency division multiplexing
Low temperature physics
Magnetic Materials
Magnetism
Physics
Physics and Astronomy
Read out systems
Room temperature
Sensor arrays
Superconducting quantum interference devices
Readout noise
Transition edge sensor
Low-noise amplifier
SQUID
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Summary:The SPICA-SAFARI instrument requires extremely sensitive transition edge sensor (TES) arrays with a noise equivalent power of 2 × 10 - 19 W/ 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 5.4 pA/ Hz and 315 pV/ Hz , respectively, which are low enough to read out SAFARI’s TES arrays.
ISSN:0022-2291
1573-7357
DOI:10.1007/s10909-019-02328-x