MRI: Development of a Sensitive Broadband Dual-Frequency Millimeter-Wavelength Polarimeter

MRI：灵敏宽带双频毫米波旋光计的开发

• 批准号: 1429236
• 负责人: Charles Bennett
• 金额: $ 203.01万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-08-15 至 2019-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1429236&HistoricalAwards=false
• 关键词: MRI; Development; Sensitive; Broadband; Dual

The development of a unique sensitive broadband dual-frequency millimeter-wavelength polarimeter is proposed by C. Bennett (Johns Hopkins University) for the primary purpose of detecting gravitational waves from the first moments of the universe. The polarimeter will be used to answer fundamental questions such as, "How did the universe begin?" In cosmology, Inflation is the cornerstone of the standard model, and the polarimeter data will provide a greatly improved limit or discovery of the energy level of Inflation. In physics, detection of a specific polarization pattern would be a detection of gravitational waves. These tests will be made using signals from the cosmic microwave background (CMB), over the full range of angular scales on which the primordial gravitational radiation leaves its strongest imprint.The proposed polarimeter uses dichroic detectors to operate simultaneously at 130-165 GHz and 200-234 GHz. These bands both provide extra sensitivity for the Cosmology Large Angular Scale Surveyor (CLASS) array to the polarized CMB and serve as a sensitive probe to identify and isolate polarized Galactic dust emission. When combined with the lower frequency CLASS instruments, the scientific impact of the original hardware investment is greatly amplified. The capability of CLASS is accentuated by its sensitivity to angular scales 10 degrees. From its Atacama site in northern Chile, not far from the equator, CLASS will survey 70% of the sky, overlapping the sky areas surveyed by the other northern and southern hemisphere observatories, and enabling the kind of multi-band data from multiple observatories that has proved so useful in the past. As all CLASS data will be made public, they will be of legacy value to the entire community.Funding for the development of the dual-frequency polarimeter for the study of inflation and gravitational waves in the early universe is being provided by NSF's Division of Astronomical Sciences through its participation in the Major Research Instrumentation program.

C. Bennett（约翰·霍普金斯大学）提出开发一种独特的灵敏宽带双频毫米波长旋光计，其主要目的是探测宇宙最初时刻的引力波。旋光计将用于回答诸如“宇宙是如何开始的？”等基本问题。在宇宙学中，暴胀是标准模型的基石，旋光仪数据将大大改进对暴胀能量水平的限制或发现。在物理学中，检测特定的偏振模式就是检测引力波。这些测试将使用来自宇宙微波背景 (CMB) 的信号，在原始引力辐射留下最强烈印记的整个角度尺度范围内进行。所提出的旋光计使用二向色探测器在 130-165 GHz 和 200 GHz 下同时工作。 -234GHz。这些波段既为宇宙学大角尺度勘测者 (CLASS) 阵列提供了对偏振 CMB 的额外灵敏度，又充当敏感探针来识别和隔离偏振银河尘埃发射。当与较低频率的 CLASS 仪器结合使用时，原始硬件投资的科学影响会大大放大。 CLASS 的功能因其对 10 度角度尺度的敏感性而得到加强。 CLASS将从距离赤道不远的智利北部阿塔卡马站点观测70%的天空，与其他北半球和南半球天文台观测的天空区域重叠，并实现来自多个天文台的多波段数据过去已被证明非常有用。由于所有 CLASS 数据都将公开，因此它们将对整个社区具有遗产价值。 NSF 天文学部正在提供开发用于研究早期宇宙暴胀和引力波的双频旋光计的资金科学通过参与重大研究仪器计划。

项目成果

On-sky Performance of the CLASS Q -band Telescope

CLASS Q波段望远镜的在天性能

• DOI: 10.3847/1538-4357/ab1652
• 发表时间: 2019-05
• 期刊: The Astrophysical Journal
• 作者: Appel, John W.;Xu, Zhilei;Padilla, Ivan L.;Harrington, Kathleen;Marquez, Bastián Pradenas;Ali, Aamir;Bennett, Charles L.;Brewer, Michael K.;Bustos, Ricardo;Chan, Manwei;et al
• 通讯作者: et al

Silicon-based antenna-coupled polarization-sensitive millimeter-wave bolometer arrays for cosmic microwave background instruments

用于宇宙微波背景仪器的硅基天线耦合偏振敏感毫米波测辐射热计阵列

• DOI: 10.1117/12.2234308
• 发表时间: 2016-07
• 期刊: SPIE Proceedings
• 作者: Holland, Wayne S.;Zmuidzinas, Jonas;Rostem, Karwan;Ali, Aamir;Appel, John W.;Bennett, Charles L.;Brown, Ari;Chang, Meng;Chuss, David T.;Colazo, Felipe A.;et al
• 通讯作者: et al

The Cosmology Large Angular Scale Surveyor

宇宙学大角度测量仪

• DOI: 10.1117/12.2233125
• 发表时间: 2016-07-19
• 作者: K. Harrington;T. Marriage;Aamir Ali;J. Appel;C. Bennett;F. Boone;M. Brewer;M. Chan;D. Chuss;F. Colazo;S. Dahal;K. Denis;R. Dünner;J. Eimer;T. Essinger;P. Fluxà;M. Halpern;G. Hilton;G. Hinshaw;J. Hubmayr;J. Iuliano;J. Karakla;J. McMahon;N. Miller;S. Moseley;G. Palma;L. Parker;M. Petroff;Basti'an Pradenas;K. Rostem;Marco Sagliocca;Deniz A. N. Valle;D. Watts;Edward J. Wollack;Zhilei Xu;L. Zeng
• 通讯作者: L. Zeng

Microwave Observations of Venus with CLASS

用 CLASS 进行金星微波观测

• DOI: 10.3847/psj/acee76
• 发表时间: 2023-08
• 期刊: The Planetary Science Journal
• 作者: Dahal, Sumit;Brewer, Michael K.;Akins, Alex B.;Appel, John W.;Bennett, Charles L.;Bustos, Ricardo;Cleary, Joseph;Couto, Jullianna D.;Datta, Rahul;Eimer, Joseph;et al
• 通讯作者: et al