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Five-Hundred-Meter Aperture Spherical Telescope Project

  • B. Peng (a1), R. Nan (a1), Y. Su (a1), Y. Qiu (a1), L. Zhu (a1) and W. Zhu (a1)...

Abstract

A Five hundred meter Aperture Spherical Telescope (FAST) is proposed to be built in the unique karst area of southwest China, and will act, in a sense, as a prototype for the Square Kilometer Array (SKA). It will be over twice as large as the Arecibo telescope coupled with much wider sky coverage. Some results from site surveys for such a SKA concept are briefly reported. Technically, FAST is not simply a copy of the existing Arecibo telescope but has rather a number of innovations. Firstly, the proposed main spherical reflector, by conforming to a paraboloid of revolution in real time through actuated active control, enables the realization of both wide bandwidth and full polarization capability while using standard feed design. Secondly, a feed support system which integrates optical, mechanical and electronic technologies will effectively reduce the cost of the support structure and control system. Pre-research on FAST has become a key project in the CAS.

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Copyright

References

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Duan, B., Zhao, Y., Wang, J. and Xu, G.: 1996, Study of the feed system for a large radio telescope from the viewpoint of mechanical and structural engineering, in: Strom, R.G., Peng, B. and Nan, R. (eds.), Proc. of the LTWG-3&W-SRT, IAP, pp. 85102.
Peng, B. and Nan, R.: 1997, Kilometer-square Area Radio Synthesis Telescope KARST project, IAU Symp. 179, 9394.
Peng, B., Nan, R., Qiu, Y., Nie, Y., etal: 1996, Further site survey for the next generation large radio telescope in Guizhou, in: Jackson, N. and Davis, R.J. (eds.), High Sensitivity Radio Astronomy, Cambridge Uni. Press, pp. 278281.
Qiu, Y.: 1998, A novel design for a giant Arecibo-type Spherical radio telescope with an active main reflector, MNRAS 301, 827830.
Ren, G., etal, 2001, ApSS, in press.
Su, Y., Zheng, Y., and Peng, B.: 1999, Schemes for segmenting the main reflector of the FAST, in: Proc. of the 4th EAMA, ASP, 94.
Zheng, Y.: 1999, Suggestions and comments on segmenting FAST reflector, MEMO to the FAST.

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