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Proceedings Paper

KMOS housekeeping electronics and its functions
Author(s): Nagaraja Bezawada; Brian Woodward; Phil Rees
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Paper Abstract

KMOS is a second generation near infrared multi-object spectrograph instrument for the VLT. It is a highly complex astronomical instrument with over 60 cryo-mechanisms deploying pickoff arms, moving filter wheels and detector focus stages. The instrument houses three identical sections each consisting of 8 pickoff arms, 2 filter wheels, 8 integral field units feeding a spectrograph and its detector systems. The housekeeping electronics provides a semi-automation of the cryostat functions such as pump down, cool down and warm up sequences, vacuum and temperature measurement and control etc. The infrastructure electronics is responsible for the safe operation of the instrument. It monitors the various cryostat conditions, takes automatic corrective actions under faulty conditions and raises alarms when a manual intervention is needed. This semi-automation design is aimed at not only minimising the risk of instrument damage, but also takes into account the safety of instrument manual handling. This paper describes the design of the instrument infrastructure electronics and details its functions such as semi-automation of the cryostat procedures, housekeeping diagnostics, automatic corrective actions under faulty conditions, scheme of alarm and warnings, detector thermal protection etc. and presents the associated interfaces to the control electronics and the cable co-rotator.

Paper Details

Date Published: 10 July 2008
PDF: 9 pages
Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 70143P (10 July 2008); doi: 10.1117/12.790389
Show Author Affiliations
Nagaraja Bezawada, UK Astronomy Technology Ctr., Royal Observatory (United Kingdom)
Brian Woodward, UK Astronomy Technology Ctr., Royal Observatory (United Kingdom)
Phil Rees, UK Astronomy Technology Ctr., Royal Observatory (United Kingdom)


Published in SPIE Proceedings Vol. 7014:
Ground-based and Airborne Instrumentation for Astronomy II
Ian S. McLean; Mark M. Casali, Editor(s)

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