Share Email Print
cover

Proceedings Paper

The POLARBEAR-2 experiment
Author(s): Takayuki Tomaru; Masashi Hazumi; Adrian T. Lee; 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; William L. Holzapfel; Yuki Inoue; Sou Ishii; Yuta Kaneko; Brian Keating; Zigmund Kermish; Nobuhiro Kimura; Ted Kisner; William Kranz; Frederick Matsuda; Tomotake Matsumura; Hideki Morii; Michael J. Myers; Haruki Nishino; Takahiro Okamura; Erin Quealy; Christian L. 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; Oliver Zahn
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

POLARBEAR-2 (PB-2) is a cosmic microwave background (CMB) polarization experiment observing at Atacama plateau in Chile. PB-2 is designed to improve the sensitivity to measure the CMB B-mode polarization by upgrading the current POLARBEAR-1 receiver that is currently mounted on the Huan Tran telescope. The improvements in PB-2 include, i) the dual band observations at 95 GHz and 150 GHz in each pixel using an sinuous antenna, ii) the increase of the total number of detectors, 7588 Al-Ti bilayer transition-edge sensor (TES) bolometers, iii) the bath temperature of bolometers at 100mK in the second phase of observation (300mK in the first phase.) With the expected sensitivity of 5.7 μK √ s, PB-2 is sensitive to a tensor-to-scalar ratio, r, of 0.01 at 95% confidence level (CL) and constrains the sum of neutrino masses as 90meV by PB-2 alone and 40meV by combining PB-2 and Planck at 68% CL. We schedule to deploy in 2014.

Paper Details

Date Published: 24 September 2012
PDF: 10 pages
Proc. SPIE 8452, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI, 84521H (24 September 2012); doi: 10.1117/12.926158
Show Author Affiliations
Takayuki Tomaru, High Energy Accelerator Research Organization (Japan)
Masashi Hazumi, High Energy Accelerator Research Organization (Japan)
Adrian T. Lee, Univ. of California, Berkeley (United States)
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 7 (France)
Giullo Fabbian, Lab. Astroparticule et Cosmologie, CNRS, Univ. Paris 7 (France)
Adnan Ghribi, Univ. of California, Berkeley (United States)
William Grainger, Cardiff Univ. (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)
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)
Frederick Matsuda, Univ. of California, San Diego (United States)
Tomotake Matsumura, High Energy Accelerator Research Organization (Japan)
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 L. 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 7 (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)
Oliver Zahn, Lawrence Berkeley National Lab. (United States)


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

© SPIE. Terms of Use
Back to Top