Title :
The South Pole Telescope SZ-Receiver Detectors
Author :
Shirokoff, Erik ; Benson, Bradford A. ; Bleem, Lindsey E. ; Chang, Clarence L. ; Cho, Hsiao-Mei ; Crites, Abigail T. ; Dobbs, Matt A. ; Holzapfel, William L. ; Lanting, Trevor ; Lee, Adrian T. ; Lueker, Martin ; Mehl, Jared ; Plagge, Thomas ; Spieler, Hel
Author_Institution :
Univ. of California, Berkeley, CA, USA
fDate :
6/1/2009 12:00:00 AM
Abstract :
We will discuss the design, fabrication, and testing of a 960-element TES array installed on the new 10 meter South Pole Telescope (SPT). This array is designed to survey for galaxy clusters using the Sunyaev-Zel´dovich (SZ) effect, which is the inverse-Compton scattering of Cosmic Microwave Background photons by plasma bound to clusters of galaxies. The SPT bolometer array consists of fully lithographed spider-web absorbers fabricated on adhesive-bonded silicon wafers with an embedded metal back plane. The absorbers are connected to aluminum-titanium bilayer TESs with a transition temperature of approximately 550 mK. Additional normal-metal features adjust the devices´ thermal properties to suit our readout system and observational strategy. The focal plane is cooled using a commercial, closed cycle, pulse-tube refrigerator and a three-stage helium sorption refrigerator with a 250 mK base temperature.
Keywords :
astronomical telescopes; clusters of galaxies; radiofrequency cosmic radiation; Cosmic Microwave Background photons; SPT bolometer array; South Pole Telescope SZ-receiver detectors; Sunyaev-Zeldovich effect; Transition Edge Sensor; adhesive-bonded silicon wafers; aluminum-titanium bilayer TESs; focal plane; fully lithographed spider-web absorbers; galaxy clusters; inverse-Compton scattering; metal back plane; observational strategy; pulse-tube refrigerator; readout system; thermal properties; three-stage helium sorption refrigerator; Bolometers; superconducting devices; transition edge sensors;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2009.2018229
