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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 308799.0, MPI für Astronomie / Publikationen_mpia
ALADDIN: an optimized nulling ground-based demonstrator for DARWIN
Authors:Coudé du Foresto, V.; Absil, O.; Swain, M.; Vakili, F.; Barillot, M.
Date of Publication (YYYY-MM-DD):2006
Title of Proceedings:Advances in Stellar Interferometry
Start Page:626810-1
End Page:5
Title of Series:SPIE
Volume (in Series):6268
Name of Conference/Meeting:Advances in Stellar Interferometry
Audience:Not Specified
Abstract / Description:The ESA Darwin space mission will require a ground based precursor to i/ demonstrate nulling interferometry in an operational context and ii/ carry out some precursor science, such as the characterization of the level of exozodiacal light around the main Darwin targets. These are the stated objectives of the GENIE nulling instrument that was studied for the VLTI. We argue here that the same objectives can be met in a more efficient way by an antarctic-based nulling experiment. The ALADDIN mission concept is an integrated L-band nulling breadboard with relatively modest collectors (1m) and baseline (40m). Because of its privileged location, this is suffcient to achieve a sensitivity (in terms of detectable zodi levels) which is 1.6 to 3.5 times better than GENIE at the VLTI, bringing it below the 20-zodi threshold value identified to carry out the Darwin precursor science. The integrated design enables top-level optimization and full access to the light collectors for the duration of the experiment, while reducing the complexity of the nulling breadboard.
Comment of the Author/Creator:Date: 2006, July 1, 2006
External Publication Status:published
Document Type:Conference-Paper
Communicated by:N. N.
Affiliations:MPI für Astronomie
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