29 research outputs found
ERIS: revitalising an adaptive optics instrument for the VLT
ERIS is an instrument that will both extend and enhance the fundamental
diffraction limited imaging and spectroscopy capability for the VLT. It will
replace two instruments that are now being maintained beyond their operational
lifetimes, combine their functionality on a single focus, provide a new
wavefront sensing module that makes use of the facility Adaptive Optics System,
and considerably improve their performance. The instrument will be competitive
with respect to JWST in several regimes, and has outstanding potential for
studies of the Galactic Center, exoplanets, and high redshift galaxies. ERIS
had its final design review in 2017, and is expected to be on sky in 2020. This
contribution describes the instrument concept, outlines its expected
performance, and highlights where it will most excel.Comment: 12 pages, Proc SPIE 10702 "Ground-Based and Airborne Instrumentation
for Astronomy VII
SOUL at LBT: commissioning results, science and future
The SOUL systems at the Large Bincoular Telescope can be seen such as
precursor for the ELT SCAO systems, combining together key technologies such as
EMCCD, Pyramid WFS and adaptive telescopes. After the first light of the first
upgraded system on September 2018, going through COVID and technical stops, we
now have all the 4 systems working on-sky. Here, we report about some key
control improvements and the system performance characterized during the
commissioning. The upgrade allows us to correct more modes (500) in the bright
end and increases the sky coverage providing SR(K)>20% with reference stars
G<17, opening to extragalcatic targets with NGS systems. Finally, we
review the first astrophysical results, looking forward to the next generation
instruments (SHARK-NIR, SHARK-Vis and iLocater), to be fed by the SOUL AO
correction.Comment: 13 pages, 10 figures, Adaptive Optics for Extremely Large Telescopes
7th Edition, 25-30 Jun 2023 Avignon (France
The ERIS adaptive optics system: from design to hardware
ERIS is the new AO instrument for VLT-UT4 led by a Consortium of Max-Planck Institut fuer Extraterrestrische Physik, UK-ATC, ETH-Zurich, NOVA-Leiden, ESO and INAF. The ERIS AO system provides NGS mode to deliver high contrast correction and LGS mode to extend high Strehl performance to large sky coverage. The AO module includes NGS and LGS wavefront sensors and, with VLT-AOF Deformable Secondary Mirror and Laser Facility, will provide AO correction to the high resolution coronagraphic imager NIX (1-5um) and the IFU spectrograph SPIFFIER (1-2.5um). In this paper, we present the final design of the ERIS AO system and the status of the of current MAIV phase
MORFEO enters final design phase
MORFEO (Multi-conjugate adaptive Optics Relay For ELT Observations, formerly
MAORY), the MCAO system for the ELT, will provide diffraction-limited optical
quality to the large field camera MICADO. MORFEO has officially passed the
Preliminary Design Review and it is entering the final design phase. We present
the current status of the project, with a focus on the adaptive optics system
aspects and expected milestones during the next project phase
MAORY for ELT: preliminary design overview
MAORY is one of the approved instruments for the European Extremely Large Telescope. It is an adaptive optics module, enabling high-angular resolution observations in the near infrared by real-time compensation of the wavefront distortions due to atmospheric turbulence and other disturbances such as wind action on the telescope. An overview of the instrument design is given in this paper
Sicurezza basata sui gruppi nei sistemi publish-subscribe.
Partendo dall'architettura iniziale di un particolare sistema publish-subscribe, REDS (REconfigurable Dispatching System), e dalle sue estensione in termini di sicurezza proposte dal sistema SEC-REDS, il presente lavoro consiste nell'estensione di alcuni meccanismi di sicurezza e nell'implementazione di algoritmi distribuiti che forniscono maggiori garanzie di sicurezza ai nodi componenti il sistema nella sua totalitĂ .
Si è provveduto inoltre ad estendere il concetto di gruppo di fiducia permettendo la comunicazione sicura anche tra gruppi distinti per mezzo della costruzione di uno speciale cliente: il Gateway.
Inoltre si è voluto incrementare il senso di sicurezza percepito da ciascun nodo sfruttando le tecnologie messe a disposizione dalla Trusted Computing Group.
Si è dunque analizzato il concetto delle cosiddette piattaforme di calcolo fidate (Trusted Computing Platform, TP) cioè piattaforme di calcolo che introducono una nuova proprietà , quella di fiducia, che si traduce nella possibilità di verificare che i componenti hardware e software della TP si comportino secondo le loro specifiche progettuali
Simple Onchip Optical Interconnection for Improving Performance of Coherence Traffic in CMPs
Design options for optical ring interconnect in future client devices
Nanophotonic is a promising solution for on-chip interconnection due to its intrinsic low-latency and low-power features. Future tiled chip multiprocessors (CMPs) for rich
client
devices can receive energy benefits from this technology but we show that great care has to be put in the integration of the various involved facets to avoid queuing and serialization issues and obtain the rated potential advantages.
We evaluate different management strategies for accessing a simple, shared photonic path (ring), working in conjunctions with a standard electronic mesh or alone, in a tiled CMP. Our results highlight that a careful selection of the most latency-critical messages to be routed in photonics and the use of a conflict-free access scheme is crucial for obtaining performance/power advantages when the available bandwidth is limited.
We identify the design point where all the traffic can be routed on the photonic path and thus the electronic network can be suppressed. At this point, the ring achieves 20--25% speedup and 84% energy consumption improvement over the electronic baseline.
Then we investigate the same trade-offs when the number of rings is increased up to eight, allowing to raise performance benefits up to 40% or reaching up to 80% energy reduction. We finally explore the effects of deploying a given optical parallelism split between a higher number of waveguides for further improving energy savings.</jats:p