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Proceedings Paper

SALT: Active control of the primary mirror with inductive edge sensors
Author(s): Hitesh Gajjar; John Menzies; David Buckley; Chris Coetzee; Deon Bester; Ockert Strydom; Jonathan Love; Keith Browne
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Paper Abstract

The Southern African Large Telescope (SALT) is a 10-m class 91-segment fixed altitude telescope located at Sutherland, South Africa. The segment alignment is maintained by inductively coupled sensors mounted on Sitall brackets beneath the segments. An extensive period of testing in environmental chambers and on the telescope has been conducted to establish the stability of the sensors and their response to temperature and humidity variations in the telescope chamber. We present some of the test results, including a demonstration of the ability of the sensors to maintain the alignment of the primary mirror over a period of 6 days.

Paper Details

Date Published: 8 August 2016
PDF: 7 pages
Proc. SPIE 9906, Ground-based and Airborne Telescopes VI, 990639 (8 August 2016); doi: 10.1117/12.2234264
Show Author Affiliations
Hitesh Gajjar, South African Astronomical Observatory (South Africa)
John Menzies, South African Astronomical Observatory (South Africa)
David Buckley, South African Astronomical Observatory (South Africa)
Chris Coetzee, South African Astronomical Observatory (South Africa)
Deon Bester, South African Astronomical Observatory (South Africa)
Ockert Strydom, South African Astronomical Observatory (South Africa)
Jonathan Love, South African Astronomical Observatory (South Africa)
Keith Browne, South African Astronomical Observatory (South Africa)


Published in SPIE Proceedings Vol. 9906:
Ground-based and Airborne Telescopes VI
Helen J. Hall; Roberto Gilmozzi; Heather K. Marshall, Editor(s)

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