ALMA: status report on construction and early results from commissioning
ALMA: status report on construction and early results from commissioning
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ALMA：施工状况报告和调试的早期结果
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
A. Peck
中科院分区：
文献类型：
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作者：
R. Hills;R. Kurz;A. Peck
阿塔卡马大型毫米/亚毫米阵列（阿尔马）是智利北方阿塔卡马地区的一个国际设施，处于建设的高级阶段。阿尔马将由两个高精度天线阵列组成：一个由12个直径为7米的天线组成，这些天线以直径约为50米的密集配置运行，另一个由多达64个直径为12米的天线组成，这些天线以直径约为150米至15公里的配置排列。另外还有四个12米长的天线提供“零间距”信息，这对于制作扩展物体的精确图像至关重要。这些天线将配备灵敏的毫米波接收器，覆盖84至950千兆赫的大部分频率范围。最先进的微波、数字、光子和软件系统将捕获信号，将其传输到中央建筑并使其相互关联，同时保持准确的同步。阿尔马将以极高的灵敏度和极高的光谱分辨率提供范围广泛的天文物体的图像。这些图像将比现有的毫米/亚毫米望远镜具有更高的“保真度”。本文介绍了施工现状和测试和科学调试的进展情况。
The Atacama Large Millimeter/submillimeter Array (ALMA) is an international facility at an advanced stage of construction in the Atacama region of northern Chile. ALMA will consist of two arrays of high-precision antennas: one made up of twelve 7-meter diameter antennas operating in closely-packed configurations of about 50m in diameter, and the other of up to sixty-four 12-meter antennas arranged in configurations with diameters ranging from about 150 meters to 15 km. There will be four more 12-meter antennas to provide the "zero-spacing" information, which is critical for making accurate images of extended objects. The antennas will be equipped with sensitive millimeter-wave receivers covering most of the frequency range 84 to 950 GHz. State-of-the-art microwave, digital, photonic and software systems will capture the signals, transfer them to the central building and correlate them, while maintaining accurate synchronization. ALMA will provide images of a wide range of astronomical objects with great sensitivity and very high spectral resolution. The images will have much higher "fidelity" than those from existing mm/submm telescopes. This paper gives an update on the status of construction and on progress with the testing and scientific commissioning.