用于毫米波接收机的超薄大孔径真空窗
天体物理仪器与方法
2018-08-03 v1 宇宙学与河外天体物理
摘要
探测宇宙微波背景中源自原初引力波的微弱偏振模式，需要极佳的观测灵敏度。Bicep3 与 Keck Array 等小孔径实验中的光学元件被设计用于优化通量并最小化毫米波处的透射、反射与散射损耗。随着孔径尺寸增大，低温恒温器真空窗必须承受更大的大气压力作用力，而解决方案常导致更厚的窗口，代价是更大的透射损耗。我们已确定一种用于制造真空窗的新候选材料：其拉伸强度比先前所用材料高两个数量级，编织高模量聚乙烯可允许显著更薄的窗口，从而大幅降低损耗并提高灵敏度。在本会议录中，我们研究高模量聚乙烯窗口对地基 CMB 实验（如 Bicep/Keck Array 计划中当前与未来的接收机）的适用性。这包括表征其光学透射特性以及大气压力下的力学行为。我们发现此类超薄材料是有望改进大孔径毫米波仪器性能的候选者，并概述了在此类科学级窗口可能即将开展实地部署之前的进一步测试计划。
引用
@article{arxiv.1808.00570,
title = {Ultra-Thin Large-Aperture Vacuum Windows for Millimeter Wavelengths Receivers},
author = {Denis Barkats and Marion I. Dierickx and John M. Kovac and Chris Pentacoff and P. A. R. Ade and Z. Ahmed and R. W. Aikin and K. D. Alexander and S. J. Benton and C. A. Bischof and J. J. Bock and R. Bowens-Rubin and J. A. Brevik and I. Buder and E. Bullock and V. Buza and J. Connors and J. Cornelison and B. P. Crill and M. Crumrine and L. Duband and C. Dvorkin and J. P. Filippini and S. Fliescher and J. Grayson and G. Hall and M. Halpern and S. Harrison and S. R. Hildebrandt and G. C. Hilton and H. Hui and K. D. Irwin and J. Kang and K. S. Karkare and E. Karpel and J. P. Kaufman and B. G. Keating and S. Kefeli and S. A. Kernasovskiy and C. L. Kuo and K. Lau and N. A. Larsen and E. M. Leitch and M. Lueker and K. G. Megerian and L. Moncelsi and T. Namikawa and H. T. Nguyen and R. O'Brient and R. W. Ogburn and S. Palladino and C. Pryke and B. Racine and S. Richter and R. Schwarz and A. Schillaci and C. D. Sheehy and A. Soliman and T. St. Germaine and Z. K. Staniszewski and B. Steinbach and R. V. Sudiwala and G. P. Teply and K. L. Thompson and J. E. Tolan and C. Tucker and A. D. Turner and C. Umilta and A. G. Vieregg and A. Wandui and A. C. Weber and D. V. Wiebe and J. Willmert and C. L. Wong and W. L. K. Wu and H. Yang and K. W. Yoon and C. Zhang},
journal= {arXiv preprint arXiv:1808.00570},
year = {2018}
}
备注
Published in Proc. SPIE. Presented at SPIE Astronomical Telescopes and Instrumentation Conference 10708: Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI, June 2018. 14 pages, 7 figures