Multi-chroic Dual-Polarization Bolometric Focal Plane for Studies of the Cosmic Microwave Background

被引:25
作者
Suzuki, A. [1 ]
Arnold, K. [1 ]
Edwards, J. [3 ]
Engargiola, G. [4 ]
Ghribi, A. [1 ]
Holzapfel, W. [1 ]
Lee, A. [1 ,4 ]
Meng, X. [5 ]
Myers, M. [1 ]
O'Brient, R. [2 ]
Quealy, E. [1 ]
Rebeiz, G. [3 ]
Richards, P. [1 ]
机构
[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
[2] CALTECH, Dept Phys, Pasadena, CA 91125 USA
[3] Univ Calif San Diego, Dept Elect Engn, La Jolla, CA 92092 USA
[4] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA
[5] Univ Calif Berkeley, Dept Elect Engn, Berkeley, CA 94720 USA
关键词
CMB; Polarization; B-Mode; Foreground removal; Broadband; TES bolometer; Sinuous antenna; Microstrip filter; Multichroic;
D O I
10.1007/s10909-012-0602-y
中图分类号
O59 [应用物理学];
学科分类号
摘要
We are developing multi-chroic antenna-coupled Transition Edge Sensor (TES) focal planes for Cosmic Microwave Background (CMB) polarimetry. In each pixel, a dual polarized sinuous antenna collects light over a two-octave frequency band. Each antenna couples to the telescope with a contacting silicon lens. The antenna couples the broadband RF signal to microstrip transmission lines, and then filter banks split the broadband signal into several frequency bands. A TES bolometer detects the power in each band and polarization. We will describe the design of this device and demonstrate its performance with optical data measured using prototype pixels. Our measurements show low ellipticity beams, low cross-polarization, and properly partitioned bands in banks of 2, 3, and 7 filters. Finally, we will describe how we will upgrade the Polarbear CMB experiment using the focal planes of these detectors to increase the experiment's mapping speed and its ability to discriminate between the CMB and polarized foregrounds.
引用
收藏
页码:852 / 858
页数:7
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