Modeling FAST, the world's largest single dish

Details Modeling FAST, the world's largest single dish Modeling FAST, the world's largest single dish

Mar 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002rascb.300...12p&link_type=abstract

The Radio Science Bulletin, No.300, p. 12-21.

Physics

Scientific paper

A Five-hundred-meter-Aperture Spherical Telescope (FAST) has been proposed to be built in the unique karst area of southwest China. In a sense, it will act as a prototype for the Square Kilometer Array (SKA). It will be over twice as large as the Arecibo radio telescope, coupled with much wider sky coverage. Some results from site surveys and scale models are briefly presented for such a SKA concept. Technically, FAST is not simply a copy of the existing Arecibo telescope, but rather it has a number of innovations. First, the proposed main spherical reflector will enable the realization of both wide bandwidth and full polarization capability, while using standard feed designs. It will do this by conforming to a paraboloid of revolution in real time, through active-control actuators. Second, a feed-support system which integrates optical, mechanical, and electronic technologies will effectively reduce the cost of the support structure and the control system. Preresearch on FAST has become a key project in the Chinese Academy of Sciences, and great progress has been achieved.

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