Thermal and optical characterization for POLARBEAR-2 optical system

Y. Inoue; N. Stebor; P. A. R. Ade; Y. Akiba; K. Arnold; A. E. Anthony; M. Atlas; D. Barron; A. Bender; D. Boettger; J. Borrilll; S. Chapman; Y. Chinone; A. Cukierman; M. Dobbs; T. Elleflot; J. Errard; G. Fabbian; C. Feng; A. Gilbert; N. W. Halverson; M. Hasegawa; K. Hattori; M. Hazumi; W. L. Holzapfel; Y. Hori; G. C. Jaehnig; A. H. Jaffe; N. Katayama; B. Keating; Z. Kermish; Reijo Keskitalo; T. Kisner; M. Le Jeune; A. T. Lee; E. M. Leitch; E. Linder; F. Matsuda; T. Matsumura; X. Meng; H. Morii; M. J. Myers; M. Navaroli; H. Nishino; T. Okamura; H. Paar; J. Peloton; D. Poletti; G. Rebeiz; C. L. Reichardt; P. L. Richards; C. Ross; D. E. Schenck; B. D. Sherwin; P. Siritanasak; G. Smecher; M. Sholl; B. Steinbach; R. Stompor; A. Suzuki; J. Suzuki; S. Takada; S. Takakura; T. Tomaru; B. Wilson; A. Yadav; H. Yamaguchi; O. Zahn

doi:10.1117/12.2055572

19 August 2014 Thermal and optical characterization for POLARBEAR-2 optical system

Y. Inoue, N. Stebor, P. A. R. Ade, Y. Akiba, K. Arnold, A. E. Anthony, M. Atlas, D. Barron, A. Bender, D. Boettger, J. Borrilll, S. Chapman, Y. Chinone, A. Cukierman, M. Dobbs, T. Elleflot, J. Errard, G. Fabbian, C. Feng, A. Gilbert, N. W. Halverson, M. Hasegawa, K. Hattori, M. Hazumi, W. L. Holzapfel, Y. Hori, G. C. Jaehnig, A. H. Jaffe, N. Katayama, B. Keating, Z. Kermish, Reijo Keskitalo, T. Kisner, M. Le Jeune, A. T. Lee, E. M. Leitch, E. Linder, F. Matsuda, T. Matsumura, X. Meng, H. Morii, M. J. Myers, M. Navaroli, H. Nishino, T. Okamura, H. Paar, J. Peloton, D. Poletti, G. Rebeiz, C. L. Reichardt, P. L. Richards, C. Ross, D. E. Schenck, B. D. Sherwin, P. Siritanasak, G. Smecher, M. Sholl, B. Steinbach, R. Stompor, A. Suzuki, J. Suzuki, S. Takada, S. Takakura, T. Tomaru, B. Wilson, A. Yadav, H. Yamaguchi, O. Zahn

Author Affiliations +

Proceedings Volume 9153, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VII; 91533A (2014) https://doi.org/10.1117/12.2055572
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

POLARBEAR-2 (PB-2) is a cosmic microwave background (CMB) polarization experiment for B-mode detection. The PB-2 receiver has a large focal plane and aperture that consists of 7588 transition edge sensor (TES) bolometers at 250 mK. The receiver consists of the optical cryostat housing reimaging lenses and infrared filters, and the detector cryostat housing TES bolometers. The large focal plane places substantial requirements on the thermal design of the optical elements at the 4K, 50K, and 300K stages. Infrared filters and lenses inside the optical cryostat are made of alumina for this purpose. We measure basic properties of alumina, such as the index of refraction, loss tangent and thermal conductivity. All results meet our requirements. We also optically characterize filters and lenses made of alumina. Finally, we perform a cooling test of the entire optical cryostat. All measured temperature values satisfy our requirements. In particular, the temperature rise between the center and edge of the alumina infrared filter at 50 K is only 2:0 ± 1:4 K. Based on the measurements, we estimate the incident power to each thermal stage.

Citation Download Citation

Y. Inoue, N. Stebor, P. A. R. Ade, Y. Akiba, K. Arnold, A. E. Anthony, M. Atlas, D. Barron, A. Bender, D. Boettger, J. Borrilll, S. Chapman, Y. Chinone, A. Cukierman, M. Dobbs, T. Elleflot, J. Errard, G. Fabbian, C. Feng, A. Gilbert, N. W. Halverson, M. Hasegawa, K. Hattori, M. Hazumi, W. L. Holzapfel, Y. Hori, G. C. Jaehnig, A. H. Jaffe, N. Katayama, B. Keating, Z. Kermish, Reijo Keskitalo, T. Kisner, M. Le Jeune, A. T. Lee, E. M. Leitch, E. Linder, F. Matsuda, T. Matsumura, X. Meng, H. Morii, M. J. Myers, M. Navaroli, H. Nishino, T. Okamura, H. Paar, J. Peloton, D. Poletti, G. Rebeiz, C. L. Reichardt, P. L. Richards, C. Ross, D. E. Schenck, B. D. Sherwin, P. Siritanasak, G. Smecher, M. Sholl, B. Steinbach, R. Stompor, A. Suzuki, J. Suzuki, S. Takada, S. Takakura, T. Tomaru, B. Wilson, A. Yadav, H. Yamaguchi, and O. Zahn "Thermal and optical characterization for POLARBEAR-2 optical system", Proc. SPIE 9153, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VII, 91533A (19 August 2014); https://doi.org/10.1117/12.2055572

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available