Bibcode
Alvarez, J. L.; Beltran, J.; Munoz, I.; Valdes, G.; Gutierrez, F.; Tapia, M.; Ramirez, C.
Referencia bibliográfica
Adaptive Optics Systems II. Edited by Ellerbroek, Brent L.; Hart, Michael; Hubin, Norbert; Wizinowich, Peter L. Proceedings of the SPIE, Volume 7736, pp. 77364X-77364X-8 (2010).
Advertised on:
7
2010
Número de citas
0
Número de citas referidas
0
Descripción
At Paranal Observatory in the YEPUN (UT4) telescope, two instruments are
installed and equipped with adaptive optics systems: an infrared spectro
imager (CONICA) below the adaptive optics module NAOS; and an integral
field spectrograph (SINFONI). In the same telescope, the Laser Guide
Star Facility (LGSF) is installed to provide a reference star to the
adaptive optics systems. The LGSF is tuned to the sodium D2 line to use
the resonance fluorescence of atomic sodium in the mesospheric layer at
an altitude of 90 Km. The LGSF system has been fully operational for
several years now. During this time, important modifications have been
made to the system to increase its availability, simplify its remote
operation and improve its performance. In this contribution, we report
on the latest upgrades in hardware as well as the software of the
system. Some upgrades like the exchange of the cooling system of the
VERDI lasers, as well as the exchange of motors in the PARSEC laser
system, have been critical to improve the performance of the system. We
also describe the improvements in the maintenance and operation
procedures and operational constraints we have faced so far. Finally, we
present and analyze the latest technical performance achieved by the
LGSF in operational conditions.