POLARBEAR-2 optical and polarimeter designs
| Autor: | Oliver Zahn, Michael J. Myers, Matt Dobbs, Julian Borrill, Yuta Kaneko, Yuji Chinone, N. W. Halverson, Ted Kisner, Darcy Barron, Paul L. Richards, Kam Arnold, G. Fabbian, Adrian T. Lee, Takahiro Okamura, Peter Smith, A. Ghribi, Suguru Takada, William Kranz, Josquin Errard, Darin Rosen, Haruki Nishino, Aritoki Suzuki, Sou Ishii, Yuki Inoue, W. L. Holzapfel, Brian Keating, Radek Stompor, Jun-ichi Suzuki, William F. Grainger, Christian L. Reichardt, H. Morii, Scott Chapman, Kaori Hattori, Michael Sholl, E. Quealy, Takayuki Tomaru, Nathan Stebor, Nobuhiro Kimura, A. Shimizu, Frederick Matsuda, Praween Siritanasak, Masaya Hasegawa, Tomotake Matsumura, Kenichi Tanaka, Peter A. R. Ade, Masashi Hazumi, Zigmund Kermish, Colin Ross |
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| Rok vydání: | 2012 |
| Předmět: |
Physics
business.industry Cosmic microwave background Astrophysics::Instrumentation and Methods for Astrophysics Polarimetry Astronomy Polarimeter Astrophysics::Cosmology and Extragalactic Astrophysics Polarization (waves) Optical telescope law.invention Telescope Optics law Transition edge sensor business Astrophysics::Galaxy Astrophysics Weak gravitational lensing |
| Zdroj: | SPIE Proceedings. |
| ISSN: | 0277-786X |
| DOI: | 10.1117/12.926770 |
| Popis: | POLARBEAR-2 is a ground based cosmic microwave background (CMB) radiation experiment observing from Atacama, Chile. The science goals of POLARBEAR-2 are to measure the CMB polarization signals originating from the inflationary gravity-wave background and weak gravitational lensing. In order to achieve these science goals, POLARBEAR-2 employs 7588 polarization sensitive transition edge sensor bolometers at observing fre quencies of 95 and 150 GHz with 5.5 and 3.5 arcmin beam width, respectively. The telescope is the off-axis Gregorian, Huan Tran Telescope, on which the POLARBEAR-1 receiver is currently mounted. The polarimetry is based on modulation of the polarized signal using a rotating half-wave plate and the rotation of the sky. We present the developments of the optical and polarimeter designs including the cryogenically cooled refractive optics that achieve the overall 4 degrees field-of-view, the thermal filter design, the broadband anti-reflection coating, and the rotating half-wave plate. |
| Databáze: | OpenAIRE |
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