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Ultra-thin large-aperture vacuum windows for millimeter wavelengths receivers

Barkats, Denis and Aikin, R. W. and Bock, J. J. and Brevik, J. A. and Hildebrandt, S. R. and Hui, H. and Kefeli, S. and Lueker, M. and Moncelsi, L. and O'Brient, R. and Schillaci, A. and Soliman, A. and Staniszewski, Z. K. and Steinbach, B. and Teply, G. P. and Zhang, C. (2018) Ultra-thin large-aperture vacuum windows for millimeter wavelengths receivers. In: Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX. Proceedings of SPIE. No.10708. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 107082K. ISBN 9781510619692.

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Targeting faint polarization patterns arising from Primordial Gravitational Waves in the Cosmic Microwave Background requires excellent observational sensitivity. Optical elements in small aperture experiments such as Bicep3 and Keck Array are designed to optimize throughput and minimize losses from transmission, reflection and scattering at millimeter wavelengths. As aperture size increases, cryostat vacuum windows must withstand larger forces from atmospheric pressure and the solution has often led to a thicker window at the expense of larger transmission loss. We have identified a new candidate material for the fabrication of vacuum windows: with a tensile strength two orders of magnitude larger than previously used materials, woven high-modulus polyethylene could allow for dramatically thinner windows, and therefore significantly reduced losses and higher sensitivity. In these proceedings we investigate the suitability of high-modulus polyethylene windows for ground-based CMB experiments, such as current and future receivers in the Bicep/Keck Array program. This includes characterizing their optical transmission as well as their mechanical behavior under atmospheric pressure. We find that such ultra-thin materials are promising candidates to improve the performance of large-aperture instruments at millimeter wavelengths, and outline a plan for further tests ahead of a possible upcoming field deployment of such a science-grade window.

Item Type:Book Section
Related URLs:
URLURL TypeDescription Paper
Bock, J. J.0000-0002-5710-5212
Moncelsi, L.0000-0002-4242-3015
Zhang, C.0000-0001-8288-5823
Additional Information:© 2018 Society of Photo-optical Instrumentation Engineers (SPIE).
Group:Astronomy Department
Subject Keywords:Millimeter Wavelengths, Vacuum Windows, Polymer Materials, Cosmic Microwave Background, Primordial Gravitational Waves, Polarization, BICEP, Keck Array
Series Name:Proceedings of SPIE
Issue or Number:10708
Record Number:CaltechAUTHORS:20190108-100050663
Persistent URL:
Official Citation:Denis Barkats, Marion I. Dierickx, John M. Kovac, Chris Pentacoff, P. A. R. Ade, Z. Ahmed, R. W. Aikin, K. D. Alexander, S. J. Benton, C. A. Bischoff, J. J. Bock, R. Bowens-Rubin, J. A. Brevik, I. Buder, E. Bullock, V. Buza, J. Connors, J. Cornelison, B. P. Crill, M. Crumrine, L. Duband, C. Dvorkin, J. P. Filippini, S. Fliescher, J. A. Grayson, G. Hall, M. Halpern, S. A. Harrison, S. R. Hildebrandt, G. C. Hilton, H. Hui, K. D. Irwin, J. Kang, K. S. Karkare, E. Karpel, J. P. Kaufman, B. G. Keating, S. Kefeli, S. A. Kernasovskiy, C. L. Kuo, K. Lau, N. A. Larsen, E. M. Leitch, M. Lueker, K. G. Megerian, L. Moncelsi, T. Namikawa, H. T. Nguyen, R. O'Brient, R. W. Ogburn, S. Palladino, C. Pryke, B. Racine, S. Richter, R. Schwarz, A. Schillaci, C. D. Sheehy, A. Soliman, T. St. Germaine, Z. K. Staniszewski, B. Steinbach, R. V. Sudiwala, G. P. Teply, K. L. Thompson, J. E. Tolan, C. Tucker, A. D. Turner, C. Umiltà, A. G. Vieregg, A. Wandui, A. C. Weber, D. V. Wiebe, J. Willmert, C. L. Wong, W. L. K. Wu, H. Yang, K. W. Yoon, C. Zhang, "Ultra-thin large-aperture vacuum windows for millimeter wavelengths receivers," Proc. SPIE 10708, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX, 107082K (9 July 2018); doi: 10.1117/12.2312585
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:92133
Deposited By: Tony Diaz
Deposited On:08 Jan 2019 20:59
Last Modified:16 Nov 2021 03:47

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