Design and Performance of Kilo-Pixel TES Arrays for ACTPol

Author

Grace, E.A. ; Beall, J.A. ; Britton, J. ; Cho, H.M. ; Devlin, M.J. ; Fox, Anna E. ; Hilton, G.C. ; Hubmayr, J. ; Irwin, K.D. ; Klein, John ; Lungu, Mircea ; Newburgh, L.B. ; Nibarger, J.P. ; Niemack, M.D. ; McMahon, James ; Page, L.A. ; Pappas, Christine

Author_Institution

Joseph Henry Labs. of Phys., Princeton Univ., Princeton, NJ, USA

Volume

23

Issue

3

fYear

2013

fDate

Jun-13

Firstpage

2500704

Lastpage

2500704

Abstract

ACTPol, a polarization sensitive receiver for the Atacama Cosmology Telescope, is designed to make sensitive maps of the cosmic microwave background anisotropies at arcminute scales and millimeter wavelengths by employing three arrays of superconducting transition edge sensor (TES) detectors. The ACTPol TES bolometers have a target superconducting transition temperature of 150 mK and will be cooled to a bath temperature of 100 mK with a dilution refrigerator enabling increased array sensitivity. Each array will consist of ~1000 TES detectors coupled to a micromachined silicon feedhorn stack via superconducting ortho-mode transducers and transmission lines. The superconducting detectors of the first ACTPol array have been characterized in their final receiver configuration with measurements of key TES parameters including the transition temperature, saturation power, and thermal conductance.

Keywords

astronomical telescopes; bolometers; radiofrequency cosmic radiation; silicon; superconducting junction devices; superconducting transmission lines; ACTPol TES bolometers; Atacama Cosmology Telescope; Si; TES detectors; arcminute scales; bath temperature; cosmic microwave background anisotropies; dilution refrigerator; key TES parameters; kilo-pixel TES arrays; micromachined silicon feedhorn stack; millimeter wavelengths; polarization sensitive receiver; saturation power; superconducting detectors; superconducting ortho-mode transducers; superconducting transition edge sensor; superconducting transition temperature; thermal conductance; transmission lines; Detectors; Physics; Superconducting transition temperature; Telescopes; Temperature measurement; Temperature sensors; Bolometer; cosmic microwave background (CMB); polarimetry; transition edge sensor (TES);

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2013.2242191

Filename

6416936