Abstract
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.
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References
K. Arnold, Design and deployment of the Polarbear cosmic microwave background polarization experiment. Ph.D. Dissertation, University of California, Berkeley (2010)
J. Bock et al., Taskforce on Cosmic Microwave Background Research (2006). arXiv:astro-ph/0604101
R. DuHamel, Dual polarized sinuous antennas. US Patent 4,658,262, 1987
G. Deschamps, Impedance properties of complementary multiterminal planar structures. IEEE Trans. Antennas Propag. 7(5), 371–378 (1959). doi:10.1109/TAP.1959.1144717
J. Edwards, R. O’Brient, A. Lee, G. Rebeiz, Dual polarized sinuous antennas on extended hemispherical silicon lenses. IEEE Trans. Antennas Propag. (2012) submitted
C. Galbraith, G. Rebeiz, Higher order Cochlea-like channelizing filters. IEEE Trans. Microw. Theory Tech. 56(7), 1675–1683 (2008)
A. Kerr, Surface impedance of superconductors and normal conductors in EM simulators (1999) (Online). Available: http://www.alma.nrao.edu/memos/
S. Kumar, A. Vayonakis, H. LeDuc, P. Day, S. Golwala, J. Zmuidzinas, Millimeter-wave lumped element superconducting bandpass filters for multi-color imaging. IEEE Trans. Appl. Supercond. 19(3), 924–929 (2009)
R. O’Brient, A log periodic focal-plane architecture for cosmic microwave background polarimetry. Ph.D. Dissertation, University of California, Berkeley (2010)
R. O’Brient, P. Ade, K. Arnold, J. Edwards, G. Engargiola, W. Holzapfel, A.T. Lee, X.F. Meng, M. Myers, E. Quealy, G. Rebeiz, P. Richards, A. Suzuki, A dual-polarized multichroic antenna-coupled TES bolometer for terrestrial CMB Polarimetry. Proc. SPIE 7741, 77410J (2010)
Acknowledgements
We acknowledge support from the NASA, NASA grant NNX10AC67G. We fabricated our device at the Marvell Nanofabrication Laboratory at the University of California, Berkeley.
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Suzuki, A., Arnold, K., Edwards, J. et al. Multi-chroic Dual-Polarization Bolometric Focal Plane for Studies of the Cosmic Microwave Background. J Low Temp Phys 167, 852–858 (2012). https://doi.org/10.1007/s10909-012-0602-y
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DOI: https://doi.org/10.1007/s10909-012-0602-y