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Optimization of Transition Edge Sensor Arrays for Cosmic Microwave Background Observations with the South Pole Telescope

  • Author(s): Ding, J
  • Ade, PAR
  • Anderson, AJ
  • Avva, J
  • Ahmed, Z
  • Arnold, K
  • Austermann, JE
  • Bender, AN
  • Benson, BA
  • Bleem, LE
  • Byrum, K
  • Carlstrom, JE
  • Carter, FW
  • Chang, CL
  • Cho, HM
  • Clich, JF
  • Cukierman, A
  • Czaplewski, D
  • Divan, R
  • De Haan, T
  • Dobbs, MA
  • Dutcher, D
  • Everett, W
  • Gilbert, A
  • Gannon, R
  • Guyser, R
  • Halverson, NW
  • Harrington, NL
  • Hattori, K
  • Henning, JW
  • Hilton, GC
  • Holzapfel, WL
  • Hubmayr, J
  • Huang, N
  • Irwin, KD
  • Jeong, O
  • Khaire, T
  • Kubik, D
  • Kuo, CL
  • Lee, AT
  • Leitch, EM
  • Meyer, SS
  • Miller, CS
  • Montgomery, J
  • Nadolski, A
  • Natoli, T
  • Nguyen, H
  • Novosad, V
  • Padin, S
  • Pan, Z
  • Pearson, J
  • Posada, CM
  • Rahlin, A
  • Reichardt, CL
  • Ruhl, JE
  • Saliwanchik, BR
  • Sayre, JT
  • Shariff, JA
  • Shirley, I
  • Shirokoff, E
  • Smecher, G
  • Sobrin, J
  • Stan, L
  • Stark, AA
  • Story, K
  • Suzuki, A
  • Tang, QY
  • Thakur, RB
  • Thompson, KL
  • Tucker, C
  • Vanderlinde, K
  • Vieira, JD
  • Wang, G
  • Whitehorn, N
  • Wu, WLK
  • Yefremenko, V
  • Yoon, KW
  • et al.
Abstract

In this paper, we describe the optimization of transition-edge-sensor (TES) detector arrays for the third-generation camera for the South Pole Telescope. The camera, which contains ~ 16 000 detectors, will make high-angular-resolution maps of the temperature and polarization of the cosmic microwave background. Our key results are scatter in the transition temperature of Ti/Au TESs is reduced by fabricating the TESs on a thin Ti(5 nm)/Au(5 nm) buffer layer and the thermal conductivity of the legs that support our detector islands is dominated by the SiOx dielectric in the microstrip transmission lines that run along the legs.

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