POLARBEAR-2 optical and polarimeter designs

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

doi:10.1117/12.926770

5 October 2012 POLARBEAR-2 optical and polarimeter designs

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

Author Affiliations +

Proceedings Volume 8452, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI; 84523E (2012) https://doi.org/10.1117/12.926770
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

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.

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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, and Oliver Zahn "POLARBEAR-2 optical and polarimeter designs", Proc. SPIE 8452, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI, 84523E (5 October 2012); https://doi.org/10.1117/12.926770

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