Multi-chroic Dual-Polarization Bolometric Focal Plane for Studies of the Cosmic Microwave Background
| Autor: | M. J. Myers, Paul L. Richards, Kam Arnold, G. Engargiola, W. L. Holzapfel, Roger O'Brient, A. Ghribi, Jennifer Edwards, X. Meng, E. Quealy, Adrian T. Lee, Aritoki Suzuki, Gabriel M. Rebeiz |
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| Rok vydání: | 2012 |
| Předmět: |
Physics
Physics::Instrumentation and Detectors Frequency band business.industry Cosmic microwave background Bolometer Astrophysics::Instrumentation and Methods for Astrophysics Polarimetry Astrophysics::Cosmology and Extragalactic Astrophysics Condensed Matter Physics Polarization (waves) Atomic and Molecular Physics and Optics law.invention Optics Cardinal point law General Materials Science Radio frequency Transition edge sensor business |
| Zdroj: | Journal of Low Temperature Physics. 167:852-858 |
| ISSN: | 1573-7357 0022-2291 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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