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Title: Frequency-Domain Multiplexed Readout for Superconducting Gamma-Ray Detectors

Abstract

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.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
Physics Division
OSTI Identifier:
937490
Report Number(s):
LBNL-974E
TRN: US0805798
DOE Contract Number:
DE-AC02-05CH11231
Resource Type:
Journal Article
Resource Relation:
Journal Name: IEEE Transactions on Applied Superconductivity; Journal Volume: 17; Journal Issue: 2; Related Information: Journal Publication Date: June, 2007
Country of Publication:
United States
Language:
English
Subject:
46; ABSORPTION; AMPLITUDES; BOLOMETERS; PERFORMANCE; PREAMPLIFIERS; RELICT RADIATION; Frequency domain multiplexing, gamma ray detectors, superconducting radiation detectors, transition edge sensors

Citation Formats

Dreyer, Jonathan G., Arnold, Kam, Lanting, Trevor M., Dobbs, Matt A., Friedrich, Stephan, Lee, Adrian T., and Spieler, Helmuth G.. Frequency-Domain Multiplexed Readout for Superconducting Gamma-Ray Detectors. United States: N. p., 2006. Web.
Dreyer, Jonathan G., Arnold, Kam, Lanting, Trevor M., Dobbs, Matt A., Friedrich, Stephan, Lee, Adrian T., & Spieler, Helmuth G.. Frequency-Domain Multiplexed Readout for Superconducting Gamma-Ray Detectors. United States.
Dreyer, Jonathan G., Arnold, Kam, Lanting, Trevor M., Dobbs, Matt A., Friedrich, Stephan, Lee, Adrian T., and Spieler, Helmuth G.. Wed . "Frequency-Domain Multiplexed Readout for Superconducting Gamma-Ray Detectors". United States. doi:. https://www.osti.gov/servlets/purl/937490.
@article{osti_937490,
title = {Frequency-Domain Multiplexed Readout for Superconducting Gamma-Ray Detectors},
author = {Dreyer, Jonathan G. and Arnold, Kam and Lanting, Trevor M. and Dobbs, Matt A. and Friedrich, Stephan and Lee, Adrian T. and Spieler, Helmuth G.},
abstractNote = {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.},
doi = {},
journal = {IEEE Transactions on Applied Superconductivity},
number = 2,
volume = 17,
place = {United States},
year = {Wed Aug 30 00:00:00 EDT 2006},
month = {Wed Aug 30 00:00:00 EDT 2006}
}
  • We demonstrate an eight-channel frequency-domain readout multiplexer for superconducting transition-edge sensors (TESs). Each sensor is biased with a sinusoidal voltage at a unique frequency. The sensor currents are summed and measured with a single superconducting quantum interference device (SQUID) array. The 100-element SQUID array is operated with shunt feedback electronics that have a slew rate of 1.2 x 107PHI 0/s at 1 MHz. The multiplexer readout noise is 6.5 pA/sqrt Hz, which is well below the expected sensor noise of 15 pA/sqrt Hz. We measure an upper limit on adjacent channel cross talk of 0.004, which meets our design requirements.more » The demodulated noise spectra of multiplexed TESs are white at frequencies down to 200 mHz.« less
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  • The sensitivity of next-generation gravitational-wave detectors such as Advanced LIGO and LCGT should be limited mostly by quantum noise with an expected technical progress to reduce seismic noise and thermal noise. Those detectors will employ the optical configuration of resonant-sideband-extraction that can be realized with a signal-recycling mirror added to the Fabry-Perot Michelson interferometer. While this configuration can reduce quantum noise of the detector, it can possibly increase laser frequency noise and intensity noise. The analysis of laser noise in the interferometer with the conventional configuration has been done in several papers, and we shall extend the analysis to themore » resonant-sideband-extraction configuration with the radiation-pressure effect included. We shall also refer to laser noise in the case we employ the so-called DC readout scheme.« less
  • No abstract prepared.