Characterization and performance of the second-year SPT-3G focal plane
Abstract
The third-generation instrument for the 10-meter South Pole Telescope, SPT-3G, was first installed in January 2017. In addition to completely new cryostats, secondary telescope optics, and readout electronics, the number of detectors in the focal plane has increased by an order of magnitude from previous instruments to ~16,000. The SPT-3G focal plane consists of ten detector modules, each with an array of 269 trichroic, polarization-sensitive pixels on a six-inch silicon wafer. Within each pixel is a broadband, dual-polarization sinuous antenna; the signal from each orthogonal linear polarization is divided into three frequency bands centered at 95, 150, and 220 GHz by in-line lumped element filters and transmitted via superconducting microstrip to Ti/Au transition-edge sensor (TES) bolometers. Properties of the TES film, microstrip filters, and bolometer island must be tightly controlled to achieve optimal performance. For the second year of SPT-3G operation, we have replaced all ten wafers in the focal plane with new detector arrays tuned to increase mapping speed and improve overall performance. Here we discuss the TES superconducting transition temperature and normal resistance, detector saturation power, bandpasses, optical efficiency, and full array yield for the 2018 focal plane.
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Cite
@article{arxiv.1809.00033,
title = {Characterization and performance of the second-year SPT-3G focal plane},
author = {D. Dutcher and P. A. R. Ade and Z. Ahmed and A. J. Anderson and J. S. Avva and R. Basu Thakur and A. N. Bender and B. A. Benson and J. E. Carlstrom and F. W. Carter and T. W. Cecil and C. L. Chang and J. F. Cliche and A. Cukierman and T. de Haan and J. Ding and M. A. Dobbs and W. Everett and A. Foster and J. Gallicchio and A. Gilbert and J. C. Groh and S. T. Guns and N. W. Halverson and A. H. Harke-Hosemann and N. L. Harrington and J. W. Henning and W. L. Holzapfel and N. Huang and K. D. Irwin and O. B. Jeong and M. Jonas and T. S. Khaire and A. M. Kofman and M. Korman and D. L. Kubik and S. Kuhlmann and C. -L. Kuo and A. T. Lee and A. E. Lowitz and S. S. Meyer and D. Michalik and J. Montgomery and A. Nadolski and T. Natoli and H. Nguyen and G. I. Noble and V. Novosad and S. Padin and Z. Pan and J. Pearson and C. M. Posada and W. Quan and A. Rahlin and J. E. Ruhl and J. T. Sayre and E. Shirokoff and G. Smecher and J. A. Sobrin and A. A. Stark and K. T. Story and A. Suzuki and K. L. Thompson and C. Tucker and K. Vanderlinde and J. D. Vieira and G. Wang and N. Whitehorn and V. Yefremenko and K. W. Yoon and M. R. Young},
journal= {arXiv preprint arXiv:1809.00033},
year = {2018}
}
Comments
13 pages, 11 figures