Expansion of the Berkeley-Illinois-Maryland Array (BIMA)

伯克利-伊利诺伊-马里兰阵列 (BIMA) 扩建

• 批准号: 8806698
• 负责人: William Welch
• 金额: $ 200万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-06-01 至 1994-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8806698&HistoricalAwards=false
• 关键词: Expansion; Berkeley; Illinois; Maryland; Array

This grant will enable the addition of three new millimeter wave antennas to the BIMA array, bringing the total number of antennas from six to nine. The increase to nine will provide substantial increases in speed and sensitivity, permitting a much greater range of scientific problems to be addressed by BIMA scientists and visitors. A single day's observing will yield maps with as many as 800 independent pixels. The speed is essential for studying time varying phenomena, such as comets, solar flares, and interstellar masers. The added sensitivity will allow, for example, molecular line mapping in distant galaxies. The initial array configuration will allow observations at 70-90 GHz, 90-116 GHz, and 210-270 GHz with an IF bandwidth of 830 MHz and a spectral line correlator that covers 800 MHz, nearly the whole IF band. The system will have excellent sensitivity for both line and continuum, with an effective sensitivity that is comparable to the major single millimeter antennas in the world. The schedule for construction will bring the full nine element array into operation in the spring of 1992.

这笔赠款将使BIMA阵列增加三个新的毫米波天线，使天线总数从6个增加到9个。增加到9个将大大提高速度和灵敏度，允许BIMA科学家和访问者解决更广泛的科学问题。一天的观测将产生多达800个独立像素的地图。这一速度对于研究时变现象至关重要，例如彗星、太阳耀斑和星际脉泽。例如，增加的灵敏度将允许在遥远的星系中绘制分子线。最初的阵列配置将允许在70-90 GHz、90-116 GHz和210-270 GHz进行观测，中频带宽为830 MHz，谱线相关器覆盖800 MHz，几乎覆盖整个中频频段。该系统对线和连续体都具有极好的灵敏度，其有效灵敏度可与世界上主要的单毫米天线相媲美。施工时间表将在1992年春季使全部九元阵列投入使用。