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Author(s): Bicep2 Collaboration; Keck Array Collaboration; Spider Collaboration; Ade, PAR; Aikin, RW; et al

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Abstract: 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 similar to 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 similar to 300 mu K-CMB root 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 similar to 9 mu K-CMB root 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.
Publication Date: 20-Oct-2015
Electronic Publication Date: 20-Oct-2015
Citation: Bicep2 Collaboration, Keck Array Collaboration, Spider Collaboration, Ade, PAR, Aikin, RW, Amiri, M, Barkats, D, Benton, SJ, Bischoff, CA, Bock, JJ, Bonetti, JA, Brevik, JA, Buder, I, Bullock, E, Chattopadhyay, G, Davis, G, Day, PK, Dowell, CD, Duband, L, Filippini, JP, Fliescher, S, Golwala, SR, Halpern, M, Hasselfield, M, Hildebrandt, SR, Hilton, GC, Hristov, V, Hui, H, Irwin, KD, Jones, WC, Karkare, KS, Kaufman, JP, Keating, BG, Kefeli, S, Kernasovskiy, SA, Kovac, JM, Kuo, CL, Leduc, HG, Leitch, EM, Llombart, N, Lueker, M, Mason, P, Megerian, K, Moncelsi, L, Netterfield, CB, Nguyen, HT, O'Brient, R, Ogburn, RW, Orlando, A, Pryke, C, Rahlin, AS, Reintsema, CD, Richter, S, Runyan, MC, Schwarz, R, Sheehy, CD, Staniszewski, ZK, Sudiwala, RV, Teply, GP, Tolan, JE, Trangsrud, A, Tucker, RS, Turner, AD, Vieregg, AG, Weber, A, Wiebe, DV, Wilson, P, Wong, CL, Yoon, KW, Zmuidzinas, J. (2015). ANTENNA-COUPLED TES BOLOMETERS USED IN BICEP2, Keck Array, AND SPIDER. ASTROPHYSICAL JOURNAL, 812 (2), 10.1088/0004-637X/812/2/176
DOI: doi:10.1088/0004-637X/812/2/176
ISSN: 0004-637X
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Type of Material: Journal Article
Journal/Proceeding Title: ASTROPHYSICAL JOURNAL
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

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