https://spie.org/AS24/conferencedetails/astronomy-ground-based-instrumentation?enableBackToBrowse=true&SSO=1 | 16 - 21 June 2024 Yokohama, Japan | ANDES, the high resolution spectrograph for the ELT: System Architecture Design of Phase-B-one | Alessio Zanutta | Zanutta A.,
Aliverti M.,
Balestra A.,
Bellido-Tirado O., - obellido@aip.de
Brucalassi A.,
Cabona L.,
Chazelas B.,
Coretti I.,
Di Marcantonio P.,
Gaessler W.,
Gao X., - xiaofeng.gao@stfc.ac.uk
Geers V., – vincent.geers@stfc.ac.uk
Giro E.,
Gonzalez O., – oscar.gonzalez@stfc.ac.uk
Huke P.,
Landoni M.,
Lee D., – david.lee@stfc.ac.uk
Lunney D., – david.lunney@stfc.ac.uk
MacIntosh M., - mike.macintosh@stfc.ac.uk
Marconi A.,
Montgomery D., – david.montgomery@stfc.ac.uk
Oliva E.,
Origlia L.,
Pariani G.,
Pinna E.,
Redaelli M.,
Riva M.,
Santos Diaz P., - pablo.santosdiaz@unige.ch
Scalera M.,
Selmi C.,
Waring C., – chris.waring@stfc.ac.uk
Weber M.,
Xompero M.,
Cabral A., (1,2)
Wehbe B., (1,2)
Abreu M., (1,2)
Monteiro M., (3)
Michael Lehmitz, (4)
Monica Ebert, (4)
Ralf-Rainer Rohloff, (4)
Werner Laun, (4)
Wolfgang Gaessler, (4)
Walter Seifert, (5)
Wenli Xu, (6) | | LONG ABSTRACT (300-words max):
ANDES (ArmazoNes high Dispersion Echelle Spectrograph) is a fibre-fed echelle spectrograph for the ELT with three spectral arms, spanning 0.4-1.8 μm (goal 0.35-2.4 μm) at ~100,000 resolution. It enables sensitive observations of astronomical objects, such as exoplanets, fundamental physics and other frontier science cases. We describe the instrument's design and architecture, emphasizing its unique features.
The design is driven by requirements on resolving power, slit area, spectral coverage and stability. The instrument can operate in seeing-limited or SCAO modes, with options for sky and/or calibration measurements. In SCAO mode, it can use a small IFU with different spaxel scales.
The light from the telescope reaches the Front-End on the Nasmyth platform, which has four insertable modules: two seeing-limited arms, one SCAO arm and one IFU arm. They are connected by fibres or fibre bundles to the Spectrographs in different locations: the Nasmyth Platform and the Coudé room. The wavelength splitting depends on the fibre transparency. The subsystems are placed at different distances from the telescope.
In Phase-B-one, we performed analyses to define the best trade-off for the budgets and architecture. We extended the spectrographs toward the goal ranges as much as possible. ANDES is complex, but its sophisticated and modular design will enable next-generation astronomy research. |
https://spie.org/AS24/conferencedetails/astronomy-modeling-systems-engineering?enableBackToBrowse=true | 16 - 21 June 2024 Yokohama, Japan | ANDES, the high resolution spectrograph for the ELT: Model-Based Systems Engineering approach | Alessio Zanutta | Zanutta A., Scalera M., Riva M., Balestra A., Cabona L., Di Marcantonio P., Marconi A. | | LONG ABSTRACT (300-words max):
ANDES (ArmazoNes high Dispersion Echelle Spectrograph) is one of the second-phase instruments planned for the Extremely Large Telescope (ELT) of ESO. ANDES will provide high-resolution spectroscopy in the visible and near-infrared wavelengths, enabling a wide range of scientific investigations, such as characterizing exoplanet atmospheres, testing fundamental physics, and measuring the cosmic expansion. In this paper, we present the general strategy of the Model-Based Systems Engineering (MBSE) approach that we have used to design the instrument during the Phase B-One, which covers the system architecture review (SAR) successfully completed at end 2023. We describe how we have applied the Cameo Systems Modeler tool to create and manage the system model in compliance with the SysML standard to perform requirements and interfaces management, structure verification and validation, and trade-off analysis. We also emphasize that ANDES is used as a test case for the application of the MBSE methodology in the astronomical field, in order to create a standard of procedures to perform all the actions and tasks that serve to satisfy all the steps in the various design phases of an ESO project. In fact, the inital phases require specific tasks, such as the analysis of requirements, the flow-down of specifications to the subsystems, the tracing of interfaces, the analysis of budgets. Since there is no tool that specifically encompasses all these capabilities in the astronomical field, it is necessary to define a robust methodology that can be taken as an example for future astronomical instrumentation. We discuss the benefits and challenges of using MBSE for ANDES, as well as the lessons learned and best practices that can be useful for other astronomical instrument projects. |