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Design of 280 GHz feedhorn-coupled TES arrays for the balloon-borne polarimeter SPIDER

Hubmayr, Johannes and Moncelsi, Lorenzo (2016) Design of 280 GHz feedhorn-coupled TES arrays for the balloon-borne polarimeter SPIDER. In: Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII. Proceedings of SPIE. No.9914. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 99140V. ISBN 978-1-5106-0207-6.

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We describe 280 GHz bolometric detector arrays that instrument the balloon-borne polarimeter spider. A primary science goal of spider is to measure the large-scale B-mode polarization of the cosmic microwave background (cmb) in search of the cosmic-inflation, gravitational-wave signature. 280 GHz channels aid this science goal by constraining the level of B-mode contamination from galactic dust emission. We present the focal plane unit design, which consists of a 16x16 array of conical, corrugated feedhorns coupled to a monolithic detector array fabricated on a 150 mm diameter silicon wafer. Detector arrays are capable of polarimetric sensing via waveguide probe-coupling to a multiplexed array of transition-edge-sensor (TES) bolometers. The spider receiver has three focal plane units at 280 GHz, which in total contains 765 spatial pixels and 1,530 polarization sensitive bolometers. By fabrication and measurement of single feedhorns, we demonstrate 14.7° FHWM Gaussian-shaped beams with <1% ellipticity in a 30% fractional bandwidth centered at 280 GHz. We present electromagnetic simulations of the detection circuit, which show 94% band-averaged, single-polarization coupling efficiency, 3% reflection and 3% radiative loss. Lastly, we demonstrate a low thermal conductance bolometer, which is well-described by a simple TES model and exhibits an electrical noise equivalent power (NEP) = 2.6 x 10^(-17) W/√Hz, consistent with the phonon noise prediction.

Item Type:Book Section
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URLURL TypeDescription Paper
Moncelsi, Lorenzo0000-0002-4242-3015
Additional Information:© 2016 Society of Photo-Optical Instrumentation Engineers (SPIE). Contribution of NIST not subject to copyright. The spider project is supported by NASA under APRA grant NNX12AE95G, issued through the Science Mission Directorate, by the NSF through the award PLR-1043515, and by the David and Lucile Packard Foundation. Logistical support for the Antarctic deployment and operations was provided by the NSF through the U.S. Antarctic Program. We performed our 3D electromagnetic simulations on the Baker-Jarvis Cluster and supporting infrastructure in the Communications Technology Laboratory at NIST, Boulder.
Funding AgencyGrant Number
David and Lucile Packard FoundationUNSPECIFIED
National Institute of Standards and Technology (NIST)UNSPECIFIED
Subject Keywords:CMB, polarimetry, TES, bolometer, feedhorn
Series Name:Proceedings of SPIE
Issue or Number:9914
Record Number:CaltechAUTHORS:20161115-091006202
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Official Citation:Johannes Hubmayr ; Jason E. Austermann ; James A. Beall ; Daniel T. Becker ; Steven J. Benton ; A. Stevie Bergman ; J. Richard Bond ; Sean Bryan ; Shannon M. Duff ; Adri J. Duivenvoorden ; H. K. Eriksen ; Jeffrey P. Filippini ; A. Fraisse ; Mathew Galloway ; Anne E. Gambrel ; K. Ganga ; Arpi L. Grigorian ; Riccardo Gualtieri ; Jon E. Gudmundsson ; John W. Hartley ; M. Halpern ; Gene C. Hilton ; William C. Jones ; Jeffrey J. McMahon ; Lorenzo Moncelsi ; Johanna M. Nagy ; C. B. Netterfield ; Benjamin Osherson ; Ivan Padilla ; Alexandra S. Rahlin ; B. Racine ; John Ruhl ; T. M. Rudd ; J. A. Shariff ; J. D. Soler ; Xue Song ; Joel N. Ullom ; Jeff Van Lanen ; Michael R. Vissers ; I. K. Wehus ; Shyang Wen ; D. V. Wiebe ; Edward Young; Design of 280 GHz feedhorn-coupled TES arrays for the balloon-borne polarimeter SPIDER. Proc. SPIE 9914, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII, 99140V (July 19, 2016); doi:10.1117/12.2231896.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:72022
Deposited By: Ruth Sustaita
Deposited On:15 Nov 2016 21:21
Last Modified:11 Nov 2021 04:54

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