Conceptual design of a 5-m terahertz telescope at Dome A

Dehua Yang; Hai Wang; Yong Zhang; Yi Chen; Guohua Zhou; Jingquan Cheng; Guoping Li

doi:10.1117/12.925778

17 September 2012 Conceptual design of a 5-m terahertz telescope at Dome A

Dehua Yang, Hai Wang, Yong Zhang, Yi Chen, Guohua Zhou, Jingquan Cheng, Guoping Li

Proceedings Volume 8444, Ground-based and Airborne Telescopes IV; 84445B (2012) https://doi.org/10.1117/12.925778
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

A 5-meter terahertz telescope is proposed by the Chinese Center for Antarctic Astronomy (CCAA) for the East Antarctica site of the Dome A plateau. The Dome A 5-m terahertz telescope (DATE 5) will be operated at sub-millimeter waveband taking the unique advantage of the transparent atmospheric windows between 200 and 350 μm wavelengths at Dome A. A preliminary design has been conducted according to the given technical requirements and the special environmental conditions at Dome A. A symmetric R-C Cassegrain optical system is designed for the telescope, with a primary f-ratio of 0.4 and a wide field of view of 10 arcmin. The magnification of the sub-reflector is 9.4, leading to the final focal ratio of 3.76 and the focus 0.2 m below the vertex of the primary reflector. To ensure surface accuracy of the reflectors precise as small as 10 um RMS, we consider using Carbon Fiber Reinforced Plastics (CFRP) to build the backup structure (BUS) of the primary reflector and the sub-reflector itself. An alt-azimuthal mounting is adopted and a tall base structure beneath the telescope is set up to lift the telescope above the low atmosphere turbulent layer. All the mechanics, as well as control electronics, are strictly designed to fit the lower temperature operation in the Dome A environment. This paper is to generally present the mentioned systematic optical, structural and electronic design of the DATE 5 telescope.

Citation Download Citation

Dehua Yang, Hai Wang, Yong Zhang, Yi Chen, Guohua Zhou, Jingquan Cheng, and Guoping Li "Conceptual design of a 5-m terahertz telescope at Dome A", Proc. SPIE 8444, Ground-based and Airborne Telescopes IV, 84445B (17 September 2012); https://doi.org/10.1117/12.925778

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available