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Proceedings Paper

The heat stop for the 4-m European Solar Telescope EST
Author(s): F. Berrilli; A. Egidi; D. Del Moro; F. Manni; M. Cocciolo; A. Scotto; R. Volkmer; F. C. M. Bettonvil; M. Collados Vera; L. Cavaller Marquez; J. Sanchez Capuchino
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Paper Abstract

A study is presented for the realization of the heat stop for the 4-m European Solar Telescope EST, whose feasibility study will be completed in 2011. EST is an on-axis Gregorian telescope, equipped with a four-meter diameter primary mirror and primary focal length of about six meters. The heat stop, positioned at the primary focus, must be able to remove a heat load of 13 kW, while maintaining its surfaces very close to room temperature, to avoid the onset of seeing. In order to remove the heat, three configurations have been taken into consideration: 1) a flat 45° inclined heat rejecter, 2) a 45° conical heat rejecter and 3) a heat trap (made of a conical heat rejecter and a cylindrical heat absorber). All devices include an air removal system to avoid the formation of thermal plumes.

Paper Details

Date Published: 4 August 2010
PDF: 7 pages
Proc. SPIE 7733, Ground-based and Airborne Telescopes III, 77332Z (4 August 2010); doi: 10.1117/12.856596
Show Author Affiliations
F. Berrilli, Univ. di Roma Tor Vergata (Italy)
A. Egidi, Univ. di Roma Tor Vergata (Italy)
D. Del Moro, Univ. di Roma Tor Vergata (Italy)
F. Manni, S.R.S. Engineering Design s.r.l. (Italy)
M. Cocciolo, Univ. di Roma Tor Vergata (Italy)
S.R.S. Engineering Design s.r.l. (Italy)
A. Scotto, S.R.S. Engineering Design s.r.l. (Italy)
R. Volkmer, Kiepenheuer-Institut für Sonnenphysik (Germany)
F. C. M. Bettonvil, Univ. Utrecht (Netherlands)
M. Collados Vera, Instituto de Astrofísica de Canarias (Spain)
L. Cavaller Marquez, Instituto de Astrofísica de Canarias (Spain)
J. Sanchez Capuchino, Instituto de Astrofísica de Canarias (Spain)

Published in SPIE Proceedings Vol. 7733:
Ground-based and Airborne Telescopes III
Larry M. Stepp; Roberto Gilmozzi; Helen J. Hall, Editor(s)

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