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In-flight gain monitoring of SPIDER's transition-edge sensor arrays

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arxiv 2112.00820 v2 pith:MODMD3YU submitted 2021-12-01 astro-ph.IM

In-flight gain monitoring of SPIDER's transition-edge sensor arrays

J. P. Filippini , A. E. Gambrel , A. S. Rahlin , E. Y. Young , P. A. R. Ade , M. Amiri , S. J. Benton , A. S. Bergman
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R. Bihary J. J. Bock J. R. Bond J. A. Bonetti S. A. Bryan H. C. Chiang C. R. Contaldi O. Dore A. J. Duivenvoorden H. K. Eriksen M. Farhang A. A. Fraisse K. Freese M. Galloway N. N. Gandilo K. Ganga R. Gualtieri J. E. Gudmundsson M. Halpern J. Hartley M. Hasselfield G. Hilton W. Holmes V. V. Hristov Z. Huang K. D. Irwin W. C. Jones A. Karakci C. L. Kuo Z. D. Kermish J. S.-Y. Leung S. Li D. S. Y. Mak P. V. Mason K. Megerian L. Moncelsi T. A. Morford J. M. Nagy C. B. Netterfield M. Nolta R. O'Brient B. Osherson I. L. Padilla B. Racine C. Reintsema J. E. Ruhl M. C. Runyan T. M. Ruud J. A. Shariff E. C. Shaw C. Shiu J. D. Soler X. Song A. Trangsrud C. Tucker R. S. Tucker A. D. Turner J. F. van der List A. C. Weber I. K. Wehus S. Wen D. V. Wiebe
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Experiments deploying large arrays of transition-edge sensors (TESs) often require a robust method to monitor gain variations with minimal loss of observing time. We propose a sensitive and non-intrusive method for monitoring variations in TES responsivity using small square waves applied to the TES bias. We construct an estimator for a TES's small-signal power response from its electrical response that is exact in the limit of strong electrothermal feedback. We discuss the application and validation of this method using flight data from SPIDER, a balloon-borne telescope that observes the polarization of the cosmic microwave background with more than 2000 TESs. This method may prove useful for future balloon- and space-based instruments, where observing time and ground control bandwidth are limited.

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