Frequency-Domain Multiplexed Readout for Superconducting Gamma-Ray Detectors [electronic resource].

Published: Berkeley, Calif. : Lawrence Berkeley National Laboratory, 2006.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description: 5 : digital, PDF file
Additional Creators: Lawrence Berkeley National Laboratory and United States. Department of Energy. Office of Scientific and Technical Information

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Summary

We are developing a frequency-multiplexed readout for arrays of high-resolution Gamma detectors based on superconducting transition edge sensors (TESs). Each sensor is part of an LCR resonant circuit and is biased at an identifying carrier frequency. Several carrier signals are added and amplified with a single SQUID preamplifier at 4 K. Gamma absorption modulates the amplitude of the carrier, and demodulation at room temperature retrieves the initial temperature evolution of the sensor. This multiplexing system has originally been developed to read out large arrays of bolometers for cosmic microwave background studies. To accommodate the faster Gamma-ray signals, its demodulator bandwidth is being extended to 20 kHz to allow reading out up to eight TESs with a detector bandwidth of 10 kHz. Here we characterize the system noise performance and show how this multiplexing scheme can be adapted to read out arrays of superconducting Gamma-ray detectors.

Report Numbers

E 1.99:lbnl-974e
lbnl-974e

Other Subject(s)

Note

Published through SciTech Connect.
08/30/2006.
"lbnl-974e"
IEEE Transactions on Applied Superconductivity 17 2 FT
Lee, Adrian T.; Friedrich, Stephan; Spieler, Helmuth G.; Dobbs, Matt A.; Arnold, Kam; Dreyer, Jonathan G.; Lanting, Trevor M.
Physics Division

Funding Information

DE-AC02-05CH11231

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