Laminate polyethylene window development for large aperture millimeter receivers

Miranda Eiben; Denis Barkats; Aurelia Balkaski; Sage Crystian; Marion I. Dierickx; David C. Goldfinger; Paul K. Grimes; Robert Kimberk; John M. Kovac; Grant Meiners; Matthew A. Petroff; Destiny Santalucia; Elaine Sheffield; Calvin Tsai; Natalia Villanueva

doi:10.1117/12.2629591

31 August 2022 Laminate polyethylene window development for large aperture millimeter receivers

Miranda Eiben, Denis Barkats, Aurelia Balkaski, Sage Crystian, Marion I. Dierickx, David C. Goldfinger, Paul K. Grimes, Robert Kimberk, John M. Kovac, Grant Meiners, Matthew A. Petroff, Destiny Santalucia, Elaine Sheffield, Calvin Tsai, Natalia Villanueva

Author Affiliations +

Proceedings Volume 12190, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI; 121902L (2022) https://doi.org/10.1117/12.2629591
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

New experiments that target the B-mode polarization signals in the Cosmic Microwave Background require more sensitivity, more detectors, and thus larger-aperture millimeter-wavelength telescopes, than previous experiments. These larger apertures require ever larger vacuum windows to house cryogenic optics. Scaling up conventional vacuum windows, such as those made of High Density Polyethylene (HDPE), require a corresponding increase in the thickness of the window material to handle the extra force from the atmospheric pressure. Thicker windows cause more transmission loss at ambient temperatures, increasing optical loading and decreasing sensitivity. We have developed the use of woven High Modulus Polyethylene (HMPE), a material 100 times stronger than HDPE, to manufacture stronger, thinner windows using a pressurized hot lamination process. We discuss the development of a specialty autoclave for generating thin laminate vacuum windows and the optical and mechanical characterization of full scale science grade windows, with the goal of developing a new window suitable for BICEP Array cryostats and for future CMB applications.

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Miranda Eiben, Denis Barkats, Aurelia Balkaski, Sage Crystian, Marion I. Dierickx, David C. Goldfinger, Paul K. Grimes, Robert Kimberk, John M. Kovac, Grant Meiners, Matthew A. Petroff, Destiny Santalucia, Elaine Sheffield, Calvin Tsai, and Natalia Villanueva "Laminate polyethylene window development for large aperture millimeter receivers", Proc. SPIE 12190, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI, 121902L (31 August 2022); https://doi.org/10.1117/12.2629591

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