Details

Autor(en) / Beteiligte

• Ade, P. A. R.
• Aikin, R. W.
• Bock, J. J.
• Brevik, J. A.
• Filippini, J. P.
• Golwala, S. R.
• Amiri, M.
• Davis, G.
• Halpern, M.
• Barkats, D.
• Benton, S. J.
• Bischoff, C. A.
• Buder, I.
• Bonetti, J. A.
• Chattopadhyay, G.
• Day, P. K.
• Dowell, C. D.
• Bullock, E.
• Duband, L.
• Fliescher, S.
• Collaboration: Bicep2 Collaboration
• , Keck Array Collaboration
• Spider Collaboration
• others, and

Titel

Antenna-coupled TES bolometers used in BICEP2, Keck Array, and Spider

Ist Teil von

• The Astrophysical journal, 2015-10, Vol.812 (2)

Ort / Verlag

United Kingdom

Erscheinungsjahr

2015

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• We have developed antenna-coupled transition-edge sensor bolometers for a wide range of cosmic microwave background (CMB) polarimetry experiments, including Bicep2, Keck Array, and the balloon borne Spider. These detectors have reached maturity and this paper reports on their design principles, overall performance, and key challenges associated with design and production. Our detector arrays repeatedly produce spectral bands with 20%–30% bandwidth at 95, 150, or 230 GHz. The integrated antenna arrays synthesize symmetric co-aligned beams with controlled side-lobe levels. Cross-polarized response on boresight is typically ∼0.5%, consistent with cross-talk in our multiplexed readout system. End-to-end optical efficiencies in our cameras are routinely 35% or higher, with per detector sensitivities of NET ∼ 300 μK{sub CMB}√s. Thanks to the scalability of this design, we have deployed 2560 detectors as 1280 matched pairs in Keck Array with a combined instantaneous sensitivity of ∼9 μK{sub CMB}√s, as measured directly from CMB maps in the 2013 season. Similar arrays have recently flown in the Spider instrument, and development of this technology is ongoing.