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Proceedings Paper

GALACSI integration and functional tests
Author(s): P. La Penna; S. Ströbele; E. Aller Carpentier; J. Argomedo; R. Arsenault; R. D. Conzelmann; B. Delabre; R. Donaldson; M. Duchateau; E. Fedrigo; F. Gago; N. Hubin; J. Quentin; P. Jolley; M. Kiekebusch; J. P. Kirchbauer; B. Klein; J. Kolb; H. Kuntschner; M. Le Louarn; J. L. Lizon; P. -Y. Madec; A. Manescau; L. Mehrgan; B. Sedghi; M. Suarez Valles; C. Soenke; S. Tordo; J. Vernet; S. Zampieri
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Paper Abstract

GALACSI is the Adaptive Optics (AO) modules of the ESO Adaptive Optics Facility (AOF) that will correct the wavefront delivered to the MUSE Integral Field Spectrograph. It will sense with four 40×40 subapertures Shack-Hartmann wavefront sensors the AOF 4 Laser Guide Stars (LGS), acting on the 1170 voice-coils actuators of the Deformable Secondary Mirror (DSM). GALACSI has two operating modes: in Wide Field Mode (WFM), with the four LGS at 64” off axis, the collected energy in a 0.2”×0.2” pixel will be enhanced by a factor 2 at 750 nm over a Field of View (FoV) of 1’×1’ using the Ground Layer AO (GLAO) technique. The other mode, the Narrow Field Mode (NFM), provides an enhanced wavefront correction (Strehl Ratio (SR) of 5% (goal 10%) at 650 nm) but in a smaller FoV (7.5”×7.5”), using Laser Tomography AO (LTAO), with the 4 LGS located closer, at 10” off axis. Before being shipped to Paranal, GALACSI will be first integrated and fully tested in stand-alone, and then moved to a dedicated AOF facility to be tested with the DSM in Europe. At present the module is fully assembled, its main functionalities have been implemented and verified, and AO system tests with the DSM are starting. We present here the main system features and the results of the internal functional tests of GALACSI.

Paper Details

Date Published: 21 July 2014
PDF: 14 pages
Proc. SPIE 9148, Adaptive Optics Systems IV, 91482V (21 July 2014); doi: 10.1117/12.2055159
Show Author Affiliations
P. La Penna, European Southern Observatory (Germany)
S. Ströbele, European Southern Observatory (Germany)
E. Aller Carpentier, European Southern Observatory (Germany)
J. Argomedo, European Southern Observatory (Germany)
R. Arsenault, European Southern Observatory (Germany)
R. D. Conzelmann, European Southern Observatory (Germany)
B. Delabre, European Southern Observatory (Germany)
R. Donaldson, European Southern Observatory (Germany)
M. Duchateau, European Southern Observatory (Germany)
E. Fedrigo, European Southern Observatory (Germany)
F. Gago, European Southern Observatory (Germany)
N. Hubin, European Southern Observatory (Germany)
J. Quentin, European Southern Observatory (Germany)
P. Jolley, European Southern Observatory (Germany)
M. Kiekebusch, European Southern Observatory (Germany)
J. P. Kirchbauer, European Southern Observatory (Germany)
B. Klein, European Southern Observatory (Germany)
J. Kolb, European Southern Observatory (Germany)
H. Kuntschner, European Southern Observatory (Germany)
M. Le Louarn, European Southern Observatory (Germany)
J. L. Lizon, European Southern Observatory (Germany)
P. -Y. Madec, European Southern Observatory (Germany)
A. Manescau, European Southern Observatory (Germany)
L. Mehrgan, European Southern Observatory (Germany)
B. Sedghi, European Southern Observatory (Germany)
M. Suarez Valles, European Southern Observatory (Germany)
C. Soenke, European Southern Observatory (Germany)
S. Tordo, European Southern Observatory (Germany)
J. Vernet, European Southern Observatory (Germany)
S. Zampieri, European Southern Observatory (Germany)


Published in SPIE Proceedings Vol. 9148:
Adaptive Optics Systems IV
Enrico Marchetti; Laird M. Close; Jean-Pierre Véran, Editor(s)

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