Plastic Laminate Antireflective Coatings for Millimeter-Wave Optics in BICEP Array
Plastic Laminate Antireflective Coatings for Millimeter-Wave Optics in BICEP Array
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BICEP 阵列中毫米波光学器件的塑料层压抗反射涂层
DOI：
10.1007/s10909-023-02967-1
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发表时间：
2023
影响因子：
2
通讯作者：
Buza, V.
中科院分区：
文献类型：
--
作者：
Dierickx, M.;Ade, P. A.;Ahmed, Z.;Amiri, M.;Barkats, D.;Basu Thakur, R.;Bischoff, C. A.;Beck, D.;Bock, J. J.;Buza, V.
BICEP/BICEP系列实验的目标是从南极以度尺度分辨率观测宇宙微波背景。在接下来的几年里，“Stage-3”BICEP阵列（BA）望远镜将提高该计划的频率覆盖范围和对原始B模式偏振的灵敏度。阵列中的第一个接收器BA 1于2020年初开始在30/40 GHz进行观测。下两个接收器BA 2和BA 3目前正在组装中，将以95至150 GHz的频率绘制南部天空。所有BA接收器的共同点是折射、同轴、低温光学设计，其将微波辐射聚焦到填充有天线耦合测辐射热计的焦平面上。光学链中的每个元件都需要孔径高达760 mm的高性能抗反射涂层，并且必须承受低至4 K的重复热循环。在这里，我们提出了最近部署的BA 1接收器的30/40 GHz的抗反射涂层的设计和制造，与其各种聚乙烯，尼龙和氧化铝光学元件相匹配的指数。我们描述了一种环氧树脂涂层技术设计的氧化铝光学，它实现了在室温下超过80%的传输。对于聚乙烯光学元件，我们提出了一种新的热压缩方法，使低密度聚四氟乙烯AR层，以达到次百分之反射功率。我们描述了计划使用这些方法的下一个BA低温恒温器，这可能会通知未来的小口径望远镜的CMB-S4实验的技术选择。
The BICEP/Keckseries of experiments target the cosmic microwave background at degree-scale resolution from the South Pole. Over the next few years, the “Stage-3” BICEP Array (BA) telescope will improve the program’s frequency coverage and sensitivity to primordial B-mode polarization by an order of magnitude. The first receiver in the array, BA1, began observing at 30/40 GHz in early 2020. The next two receivers, BA2 and BA3, are currently being assembled and will map the southern sky at frequencies ranging from 95 to 150 GHz. Common to all BA receivers is a refractive, on-axis, cryogenic optical design that focuses microwave radiation onto a focal plane populated with antenna-coupled bolometers. High-performance antireflective coatings up to 760 mm in aperture are needed for each element in the optical chain, and must withstand repeated thermal cycles down to 4 K. Here, we present the design and fabrication of the 30/40 GHz anti-reflection coatings for the recently deployed BA1 receiver, with indices matched to its various polyethylene, nylon and alumina optical components. We describe an epoxy coating technique designed for alumina optics, which achieves better than 80% transmission at room temperature. For polyethylene optical elements, we present a new heat-compression approach that allows low-density polytetrafluoroethylene AR layers to reach sub-percent reflected power. We describe the planned use of these methods for the next BA cryostats, which may inform technological choices for future small-aperture telescopes of the CMB-S4 experiment.
DOI：
10.3847/1538-4357/ac4886
发表时间：
2021-10
期刊：
The Astrophysical Journal
影响因子：
--
作者：
B. C. P. Ade;Z. Ahmed;M. Amiri;D. Barkats;R. Thakur;D. Beck;C. Bischoff;J. Bock;H. Boenish;E. Bullock;V. Buza;IV J.R.Cheshire;J. Connors;J. Cornelison;M. Crumrine;A. Cukierman;E. Denison;M. Dierickx;L. Duband;M. Eiben;S. Fatigoni;J. Filippini;S. Fliescher;N. Goeckner-wald;D. Goldfinger;J. Grayson;P. Grimes;G. Halal;G. Hall;M. Halpern;E. Hand;S. Harrison;S. Henderson;S. Hildebrandt;G. Hilton;J. Hubmayr;H. Hui;K. Irwin;J. Kang;K. Karkare;E. Karpel;S. Kefeli;S. Kernasovskiy;J. Kovac;C. Kuo;K. Lau;E. Leitch;A. Lennox;K. Megerian;L. Minutolo;L. Moncelsi;Y. Nakato;T. Namikawa;H. Nguyen;R. O’Brient;IV R.W.Ogburn;S. Palladino;T. Prouvé;C. Pryke;B. Racine;C. Reintsema;S. Richter;A. Schillaci;B. Schmitt;R. Schwarz;C. Sheehy;A. Soliman;T. S. Germaine;B. Steinbach;R. Sudiwala;G. Teply;K. Thompson;J. Tolan;C. Tucker;A. Turner;C. Umilta;C. Vergés;A. Vieregg;A. Wandui;A. Weber;D. Wiebe;J. Willmert;C. L. Wong;W.L.K. Wu;H. Yang;K. Yoon;E. Young;C. Yu;L. Zeng;C. Zhang;S. University;Kipacslac;U. Columbia;HarvardCfA;Caltech;U. Cincinnati;S. University;Nasa Jpl;M. I. O. Astrophysics;U. Chicago;U. Minnesota;Nist;Sbt Grenoble;U. I. Urbana-Champaign;H. University;T. U. O. Tokyo;Aix-Marseille Université;Brookhaven National Laboratory
通讯作者：
B. C. P. Ade;Z. Ahmed;M. Amiri;D. Barkats;R. Thakur;D. Beck;C. Bischoff;J. Bock;H. Boenish;E. Bullock;V. Buza;IV J.R.Cheshire;J. Connors;J. Cornelison;M. Crumrine;A. Cukierman;E. Denison;M. Dierickx;L. Duband;M. Eiben;S. Fatigoni;J. Filippini;S. Fliescher;N. Goeckner-wald;D. Goldfinger;J. Grayson;P. Grimes;G. Halal;G. Hall;M. Halpern;E. Hand;S. Harrison;S. Henderson;S. Hildebrandt;G. Hilton;J. Hubmayr;H. Hui;K. Irwin;J. Kang;K. Karkare;E. Karpel;S. Kefeli;S. Kernasovskiy;J. Kovac;C. Kuo;K. Lau;E. Leitch;A. Lennox;K. Megerian;L. Minutolo;L. Moncelsi;Y. Nakato;T. Namikawa;H. Nguyen;R. O’Brient;IV R.W.Ogburn;S. Palladino;T. Prouvé;C. Pryke;B. Racine;C. Reintsema;S. Richter;A. Schillaci;B. Schmitt;R. Schwarz;C. Sheehy;A. Soliman;T. S. Germaine;B. Steinbach;R. Sudiwala;G. Teply;K. Thompson;J. Tolan;C. Tucker;A. Turner;C. Umilta;C. Vergés;A. Vieregg;A. Wandui;A. Weber;D. Wiebe;J. Willmert;C. L. Wong;W.L.K. Wu;H. Yang;K. Yoon;E. Young;C. Yu;L. Zeng;C. Zhang;S. University;Kipacslac;U. Columbia;HarvardCfA;Caltech;U. Cincinnati;S. University;Nasa Jpl;M. I. O. Astrophysics;U. Chicago;U. Minnesota;Nist;Sbt Grenoble;U. I. Urbana-Champaign;H. University;T. U. O. Tokyo;Aix-Marseille Université;Brookhaven National Laboratory
BICEP 阵列：多频度尺度 CMB 旋光计
DOI：
10.1117/12.2311725
发表时间：
2018
期刊：
SPIE
影响因子：
--
作者：
Hui, Howard;Ade, P. A.;Ahmed, Zeeshan;Aikin, Randol;Alexander, Kate D.;Barkats, Denis;Benton, Steve J.;Bischoff, Colin A.;Bock, James J.;Bowens-Rubin, Rachel
通讯作者：
Bowens-Rubin, Rachel