Arid
DOI10.1051/0004-6361:20054519
The ALMA correlator
Escoffier, R. P.; Comoretto, G.; Webber, J. C.; Baudry, A.; Broadwell, C. M.; Greenberg, J. H.; Treacy, R. R.; Cais, P.; Quertier, B.; Camino, P.; Bos, A.; Gunst, A. W.
通讯作者Escoffier, R. P.
来源期刊ASTRONOMY & ASTROPHYSICS
ISSN1432-0746
出版年2007
卷号462期号:2页码:801-810
英文摘要

Aims. The Atacama Large Millimeter Array (ALMA) is an international astronomy facility to be used for detecting and imaging all types of astronomical sources at millimeter and submillimeter wavelengths at a 5000-m elevation site in the Atacama Desert of Chile. Our main aims are: describe the correlator sub-system which is that part of the ALMA system that combines the signal from up to 64 remote individual radio antennas and forms them into a single instrument; emphasize the high spectral resolution and the configuration flexibility available with the ALMA correlator.


Methods. The main digital signal processing features and a block diagram of the correlator being constructed for the ALMA radio astronomy observatory are presented. Tables of observing modes and spectral resolutions offered by the correlator system are given together with some examples of multi-resolution spectral modes.


Results. The correlator is delivered by quadrants and the first quadrant is being tested while most of the other printed circuit cards required by the system have been produced. In its final version the ALMA correlator will process the outputs of up to 64 antennas using an instantaneous bandwidth of 8 GHz in each of two polarizations per antenna. In the frequency division mode, unrivalled spectral flexibility together with very high resolution (3.8 kHz) and up to 8192 spectral points are achieved. In the time division mode high time resolution is available with minimum data dump rates of 16 ms for all cross-products.


英文关键词techniques : interferometric techniques : spectroscopic instrumentation : interferometers instrumentation : spectrographs
类型Article
语种英语
国家USA ; Italy ; France ; Netherlands
收录类别SCI-E
WOS记录号WOS:000243686600043
WOS类目Astronomy & Astrophysics
WOS研究方向Astronomy & Astrophysics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/153545
作者单位(1)Natl Radio Astron Observ, Charlottesville, VA 22903 USA;(2)Osserv Astrofis Arcetri, I-50125 Florence, Italy;(3)Observ Aquitain Sci Univers, UMR 5804, CNRS, F-33270 Floirac, France;(4)ASTRON, NL-7990 AA Dwingeloo, Netherlands
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GB/T 7714
Escoffier, R. P.,Comoretto, G.,Webber, J. C.,et al. The ALMA correlator[J],2007,462(2):801-810.
APA Escoffier, R. P..,Comoretto, G..,Webber, J. C..,Baudry, A..,Broadwell, C. M..,...&Gunst, A. W..(2007).The ALMA correlator.ASTRONOMY & ASTROPHYSICS,462(2),801-810.
MLA Escoffier, R. P.,et al."The ALMA correlator".ASTRONOMY & ASTROPHYSICS 462.2(2007):801-810.
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