Advancing Technologies for Measuring the Largest Angular Scale CMB

先进的最大角尺度 CMB 测量技术

• 批准号: 2109311
• 负责人: Charles Bennett
• 金额: $ 109.65万
• 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: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2109311&HistoricalAwards=false
• 关键词: Advancing; Technologies; Measuring; Largest; Angular

Cosmology is the big-picture study of the universe. One of the most important means for research in this field is to make careful measurements of the very faint radiation known as the “cosmic microwave background.” This radiation is very faint. Also, there are other radiation signals from non-cosmological sources that must be distinguished. The technology and instrumentation to allow such experiments to make the needed measurements is a major challenge. Over the years progress has been made studying ever fainter aspects of this background radiation that are then used to test competing theoretical models. To enable such scientific progress, the underlying technologies must be improved further as will be undertaken in this project. The team will provide instrumentation training for the next generation of scientists and will leverage this project to enhance their public education efforts.This project seeks to develop technology for an enhanced polarimeter to study reionization and inflation cosmology on the Cosmology Large Angular Scale Surveyor (CLASS). CLASS is built to measure the Cosmic Microwave Background (CMB) polarization on angular scales greater than 10 degrees (corresponding to spherical harmonic multipole moments near 20). The survey looks to produce a high fidelity polarization map over 70% of the sky at frequencies near the Galactic foreground minimum. This project will develop enhanced larger format detector arrays and silicon optics that will improve CLASS sensitivity to ultimately allow better understanding of the early universe and fundamental physics.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

宇宙学是对宇宙的宏观研究，该领域最重要的研究手段之一是对被称为“宇宙微波背景”的非常微弱的辐射进行仔细测量。必须区分来自非宇宙源的其他辐射信号，使此类实验能够进行所需测量的技术和仪器是一项重大挑战，多年来，对这种背景辐射的更微弱方面的研究取得了进展。用于测试竞争理论为了实现这样的科学进步，必须进一步改进基础技术，该团队将为下一代科学家提供仪器培训，并将利用该项目来加强他们的公共教育工作。该项目寻求。开发增强型偏振计技术，以研究宇宙学大角尺度测量仪（CLASS）上的再电离和暴胀宇宙学，其目的是测量大于角尺度的宇宙微波背景（CMB）偏振。 10 度（对应于接近 20 的球谐多极矩），该勘测旨在以接近银河系前景最小值的频率生成超过 70% 的天空的高保真度偏振图。将提高 CLASS 敏感性，最终更好地理解早期宇宙和基础物理学。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查进行评估，被认为值得支持标准。

项目成果

Cosmology Large Angular Scale Surveyor (CLASS): pointing stability and beam measurements at 90, 150, and 220 GHz

宇宙学大角尺度测量仪 (CLASS)：90、150 和 220 GHz 的指向稳定性和波束测量

• DOI: 10.1117/12.2630649
• 发表时间: 2022-08
• 期刊: and Far-Infrared Detectors and Instrumentation for Astronomy XI
• 作者: Datta, Rahul;Brewer, Michael K.;Denes Couto, Jullianna D.;Eimer, Joseph R.;Li, Yunyang;Xu, Zhilei;Appel, John W.;Bustos, Ricardo;Chuss, David;Cleary, Joseph;et al
• 通讯作者: et al

Four-year Cosmology Large Angular Scale Surveyor (CLASS) Observations: On-sky Receiver Performance at 40, 90, 150, and 220 GHz Frequency Bands

四年宇宙学大角尺度测量仪 (CLASS) 观测：40、90、150 和 220 GHz 频段的空中接收器性能

• DOI: 10.3847/1538-4357/ac397c
• 发表时间: 2022-02
• 期刊: The Astrophysical Journal
• 作者: Dahal, Sumit;Appel, John W.;Datta, Rahul;Brewer, Michael K.;Ali, Aamir;Bennett, Charles L.;Bustos, Ricardo;Chan, Manwei;Chuss, David T.;Cleary, Joseph;et al
• 通讯作者: et al

Long-timescale stability in CMB observations at multiple frequencies using front-end polarization modulation

使用前端偏振调制在多个频率下实现 CMB 观测的长时标稳定性

• DOI: 10.1117/12.2629723
• 发表时间: 2022-08
• 期刊: and Far-Infrared Detectors and Instrumentation for Astronomy XI
• 作者: Cleary, Joseph;Datta, Rahul;Appel, John;Bennet, Charles;Chuss, David;Denes Couto, Julliana;Dahal, Sumit;Espinoza, Francisco;Essinger;Harrington, Kathleen;et al
• 通讯作者: et al

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

On-Sky Performance of New 90 GHz Detectors for the Cosmology Large Angular Scale Surveyor (CLASS)

用于宇宙学大角尺度测量仪 (CLASS) 的新型 90 GHz 探测器的空中性能

• DOI: 10.1109/tasc.2023.3262497
• 发表时间: 2023-08
• 期刊: IEEE Transactions on Applied Superconductivity
• 影响因子: 1.8
• 作者: Núñez, Carolina;Appel, John W.;Brewer, Michael K.;Bruno, Sarah Marie;Datta, Rahul;Bennett, Charles L.;Bustos, Ricardo;Chuss, David T.;Dahal, Sumit;Denis, Kevin L.;et al
• 通讯作者: et al