CAREER: Novel Approaches and Instrumentation for 21cm Cosmology Experiments

职业：21 厘米宇宙学实验的新方法和仪器

• 批准号: 1352519
• 负责人: Aaron Parsons
• 金额: $ 78.74万
• 依托单位: University of California-Berkeley
• 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: 2014-09-01 至 2019-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1352519&HistoricalAwards=false
• 关键词: CAREER; Novel; Approaches; Instrumentation; 21cm

Redshifted emission from the 21cm hyperfine transition of neutral hydrogen has gained considerable attention as a unique tracer of the primordial intergalactic medium. This award will enable the PI to develop the foundation of a next generation of 21cm cosmology instrumentation, incorporating techniques and principles learned from his current Precision Array to Probe the Epoch of Reionization (PAPER) experiment. The PI will construct three prototype multi-element experiments that will allow him to study three distinct cosmological epochs: the cosmic dark ages, the epoch of reionization, and the onset of baryon acoustic oscillations. The antenna designs and digitization electronics from these experiments will in turn provide invaluable information on techniques to remove contaminating astrophysical foregrounds in future instruments.The birth of the first luminous objects (stars, black holes) in the universe that ultimately stems from the Big Bang is one of the last unexplored phases of cosmic evolution. The instruments that will be produced as part of this award will facilitate transformational science in this area, and will provide key constraints on the large-scale structure of the universe, as well as the evolution of cosmological expansion. The award will also enable the PI to train the next generation of instrument builders by offering internships for students at UC Berkeley's Radio Astronomy Laboratory. Finally, the PI will produce numerous public-domain pedagogical videos, which will enable a cadre of instrumentalists and students to quickly acquire basic proficiency in radio-astronomy instrumentation.

中性氢21cm超精细跃迁的红移辐射作为原始星系际介质的独特示踪剂，已引起人们的广泛关注。该奖项将使PI能够开发下一代21厘米宇宙学仪器的基础，结合他目前的精密阵列探测再电离时代（PAPER）实验中学到的技术和原理。PI将构建三个原型多元素实验，这将使他能够研究三个不同的宇宙学时代：宇宙黑暗时代，再电离时代和重子声学振荡的开始。从这些实验中获得的天线设计和数字化电子设备将反过来提供有关技术的宝贵信息，以便在未来的仪器中消除污染的天体物理前景。宇宙中第一个发光物体（恒星、黑洞）的诞生最终源于大爆炸，是宇宙演化中最后未被探索的阶段之一。作为该奖项的一部分，将生产的仪器将促进这一领域的变革科学，并将为宇宙的大尺度结构以及宇宙膨胀的演变提供关键约束。该奖项还将使PI能够通过为加州大学伯克利分校射电天文学实验室的学生提供实习机会来培训下一代仪器制造商。最后，PI将制作大量公共领域教学视频，这将使乐器演奏家和学生能够快速掌握射电天文仪器的基本能力。