Thermal design concept of JNLT

Izumi Mikami; Noboru Itoh; Satoru Kotoh; Hiroyasu Ando

doi:10.1117/12.19223

1 July 1990 Thermal design concept of JNLT

Izumi Mikami, Noboru Itoh, Satoru Kotoh, Hiroyasu Ando

Proceedings Volume 1236, Advanced Technology Optical Telescopes IV; (1990) https://doi.org/10.1117/12.19223
Event: SPIE Astronomical Telescopes and Instrumentation for the 21st Century, 1990, Tucson, AZ, United States

Abstract

The seeing degradation in the Japanese National Large Telescope (JNLT) caused by its hemispherical dome is investigated. A possible plan of the JNLT site layout and the thermal control concept are introduced in order to attempt to reduce the seeing degradation induced by the dome to the 0.1 arcsec FWHM range budgeted. A three-dimensioal compressible fluid analysis of the inside and outside the dome, including heat transfer effect, is developed and used to understand the seeing degradation mechanism as well as the wind buffet effect on the telescope and the primary mirror.

Citation Download Citation

Izumi Mikami, Noboru Itoh, Satoru Kotoh, and Hiroyasu Ando "Thermal design concept of JNLT", Proc. SPIE 1236, Advanced Technology Optical Telescopes IV, (1 July 1990); https://doi.org/10.1117/12.19223

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