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Proceedings Paper

POLARBEAR-2 optical and polarimeter designs
Author(s): Tomotake Matsumura; Peter Ade; Kam Arnold; Darcy Barron; Julian Borrill; Scott Chapman; Yuji Chinone; Matt Dobbs; Josquin Errard; Giullo Fabbian; Adnan Ghribi; William Grainger; Nils Halverson; Masaya Hasegawa; Kaori Hattori; Masashi Hazumi; William L. Holzapfel; Yuki Inoue; Sou Ishii; Yuta Kaneko; Brian Keating; Zigmund Kermish; Nobuhiro Kimura; Ted Kisner; William Kranz; Adrian T. Lee; Frederick Matsuda; Hideki Morii; Michael J. Myers; Haruki Nishino; Takahiro Okamura; Erin Quealy; Christian Reichardt; Paul L. Richards; Darin Rosen; Colin Ross; Akie Shimizu; Michael Sholl; Praween Siritanasak; Peter Smith; Nathan Stebor; Radek Stompor; Aritoki Suzuki; Jun-ichi Suzuki; Suguru Takada; Ken-ichi Tanaka; Takayuki Tomaru; Oliver Zahn
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Paper Abstract

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.

Paper Details

Date Published: 5 October 2012
PDF: 8 pages
Proc. SPIE 8452, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI, 84523E (5 October 2012); doi: 10.1117/12.926770
Show Author Affiliations
Tomotake Matsumura, High Energy Accelerator Research Organization (Japan)
Peter Ade, Cardiff Univ. (United Kingdom)
Kam Arnold, Univ. of California, Berkeley (United States)
Darcy Barron, Univ. of California, San Diego (United States)
Julian Borrill, Lawrence Berkeley National Lab. (United States)
Scott Chapman, Dalhousie Univ. (Canada)
Yuji Chinone, High Energy Accelerator Research Organization (Japan)
Matt Dobbs, McGill Univ. (Canada)
Josquin Errard, Lab. Astroparticule et Cosmologie, CNRS, Univ. Paris Diderot (France)
Giullo Fabbian, Lab. Astroparticule et Cosmologie, CNRS, Univ. Paris Diderot (France)
Adnan Ghribi, Univ. of California, Berkeley (United States)
William Grainger, Science & Technology Facilities Council (United Kingdom)
Nils Halverson, Univ. of Colorado at Boulder (United States)
Masaya Hasegawa, High Energy Accelerator Research Organization (Japan)
Kaori Hattori, High Energy Accelerator Research Organization (Japan)
Masashi Hazumi, High Energy Accelerator Research Organization (Japan)
William L. Holzapfel, Univ. of California, Berkeley (United States)
Yuki Inoue, The Graduate Univ. for Advanced Studies (Japan)
Sou Ishii, Univ. of Tsukuba (Japan)
Yuta Kaneko, Univ. of Tokyo (Japan)
Brian Keating, Univ. of California, San Diego (United States)
Zigmund Kermish, Univ. of California, Berkeley (United States)
Nobuhiro Kimura, High Energy Accelerator Research Organization (Japan)
Ted Kisner, Lawrence Berkeley National Lab. (United States)
William Kranz, Univ. of California, Berkeley (United States)
Adrian T. Lee, Univ. of California, Berkeley (United States)
Frederick Matsuda, Univ. of California, San Diego (United States)
Hideki Morii, High Energy Accelerator Research Organization (Japan)
Michael J. Myers, Univ. of California, Berkeley (United States)
Haruki Nishino, Univ. of California, Berkeley (United States)
Takahiro Okamura, High Energy Accelerator Research Organization (Japan)
Erin Quealy, Univ. of California, Berkeley (United States)
Christian Reichardt, Univ. of California, Berkeley (United States)
Paul L. Richards, Univ. of California, Berkeley (United States)
Darin Rosen, Univ. of California, Berkeley (United States)
Colin Ross, Dalhousie Univ. (Canada)
Akie Shimizu, The Graduate Univ. for Advanced Studies (Japan)
Michael Sholl, Univ. of California, Berkeley (United States)
Praween Siritanasak, Univ. of California, San Diego (United States)
Peter Smith, Dalhousie Univ. (Canada)
Nathan Stebor, Univ. of California, San Diego (United States)
Radek Stompor, Lab. Astroparticule et Cosmologie, CNRS, Univ. Paris Diderot (France)
Aritoki Suzuki, Univ. of California, Berkeley (United States)
Jun-ichi Suzuki, High Energy Accelerator Research Organization (Japan)
Suguru Takada, Univ. of Tsukuba (Japan)
Ken-ichi Tanaka, High Energy Accelerator Research Organization (Japan)
Takayuki Tomaru, High Energy Accelerator Research Organization (Japan)
Oliver Zahn, Univ. of California, Berkeley (United States)


Published in SPIE Proceedings Vol. 8452:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI
Wayne S. Holland, Editor(s)

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