A Method of Measuring TES Complex ETF Response in Frequency-domain Multiplexed Readout by Single Sideband Power Modulation
arXiv (Cornell University), vol. 216, pp. 73
Abstract
The digital frequency domain multiplexing (DfMux) technique is widely used for astrophysical instruments with large detector arrays. Detailed detector characterization is required for instrument calibration and systematics control. We conduct the TES complex electrothermal-feedback (ETF) response measurement with the DfMux readout system as follows. By injecting a single sideband signal, we induce modulation in TES power dissipation over a frequency range encompassing the detector response. The modulated current signal induced by TES heating effect is measured, allowing for the ETF response characterization of the detector. With the injection of an upper sideband, the TES readout current shows both an upper and a lower sideband. We model the upper and lower sideband complex ETF response and verify the model by fitting to experimental data. The model not only can fit for certain physical parameters of the detector, such as loop gain, temperature sensitivity, current sensitivity, and time constant, but also enables us to estimate the systematic effect introduced by the multiplexed readout. The method is therefore useful for in-situ detector calibration and for estimating systematic effects during astronomical telescope observations, such as those performed by the upcoming LiteBIRD satellite.
Authors 8
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High Energy Accelerator Research Organization · International Center for Quantum-field Measurement Systems for Studies of the Universe and Particles
Affiliation as printed
International Center for Quantum-field Measurement Systems for Studies of the Universe and Particles (QUP) , High Energy Accelerator Research Organization (KEK) , 1-1 Oho , Tsukuba , 3050801 , Ibaraki , Japan
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High Energy Accelerator Research Organization · Institute of Particle and Nuclear Studies
Affiliation as printed
Institute of Particle and Nuclear Studies (IPNS) , High Energy Accelerator Research Organization (KEK) , 1-1 Oho , Tsukuba , 3050801 , Ibaraki , Japan
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The Graduate University for Advanced Studies, SOKENDAI · Space Research Organisation Netherlands
Affiliation as printed
Netherlands Institute for Space Research (SRON) , Niels Bohrweg 4 , Leiden , 2333 , CA , Netherlands
The Graduate University for Advanced Studies (SOKENDAI) , Japan
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High Energy Accelerator Research Organization · The Graduate University for Advanced Studies, SOKENDAI · Institute of Particle and Nuclear Studies
Affiliation as printed
Institute of Particle and Nuclear Studies (IPNS) , High Energy Accelerator Research Organization (KEK) , 1-1 Oho , Tsukuba , 3050801 , Ibaraki , Japan
The Graduate University for Advanced Studies (SOKENDAI) , Japan
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Lawrence Berkeley National Laboratory
Affiliation as printed
Lawrence Berkeley National Laboratory (LBNL) , 1 Cyclotron Road , Berkeley , 94720 , CA , United States of America
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University of California, Berkeley
Affiliation as printed
Physics Department , University of California , Berkeley , 94720 , CA , United States of America
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