Diffraction-limited Polarimetry at the Caltech Submillimeter Observatory

加州理工学院亚毫米天文台的衍射极限偏振测量

• 批准号: 0243156
• 负责人: Giles Novak
• 金额: $ 45.81万
• 依托单位: Northwestern University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-01 至 2006-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0243156&HistoricalAwards=false
• 关键词: Diffraction; limited; Polarimetry; Caltech; Submillimeter

This program will entail a detector upgrade for the University of Chicago submillimeter polarimeter, Hertz, that operates at the Caltech Submillimeter Observatory (CSO). The result will be a threefold improvement in point source sensitivity, and an improvement in angular resolution from 20 arcseconds to 8 arcseconds. The upgrade will be achieved at a relatively modest cost by using detectors that are "left over" from the large and expensive projects HAWC, and SHARC-II. The upgraded instrument, Hertz/HR (HR for "High Resolution"), will be the only submillimeter polarimeter designed for observations at 350 microns. Observations will be made of magnetic field directions in molecular clouds using the polarization produced by dust grains aligned with the field.

该计划将需要对芝加哥大学的亚毫米偏振仪赫兹进行探测器升级，该仪器在加州理工大学亚毫米天文台(CSO)运行。其结果将是点源灵敏度提高三倍，角分辨率从20角秒提高到8角秒。通过使用HAWC和SHARC-II这两个昂贵的大型项目遗留下来的探测器，升级将以相对较低的成本实现。升级后的赫兹/赫兹(HR，高分辨率)仪器将是唯一一台设计用于350微米观测的亚毫米偏振仪。观测分子云中的磁场方向将使用尘埃颗粒与磁场对齐产生的偏振。