Real-time control for adaptive optics worskshop (third edition)

Observatoire de Paris

Observatoire de Paris

77 avenue Denfert Rochereau 75014 Paris
Alastair Basden (University of Durham), Damien Gratadour, Luis Fernando Rodriguez Ramos (IAC), Marcos Suarez Valles (ESO), Olivier Guyon (Subaru Telescope), Roberto Biasi (Microgate)

At the core of extreme scale telescopes operations is adaptive optics (AO) which requires the control, at the millisecond rate, of deformable mirrors with thousands of degrees of freedom. This is the role of the real-time controller (RTC), one of the core component of any AO module. To ensure adequate turbulence compensation, hence the stability of the system, the RTC computation time must be deterministic at the level of tens of microseconds, and the latency in data transfers between the sensors, the computing cores and the deformable optics should be minimal. To build this critical component of the telescope operations, the astronomical community is facing technical challenges, emerging from the combination of high data transfer bandwidth, low latency and high throughput requirements. Meeting the specifications of these real-time multi-sensors data-intensive computing facilities, to be installed on a remote site and to be operated continuously over several years, involves addressing three strategic topics in high performance computing systems design:

  • optimize the balance between processors performance, memory capacity and data access between sensors, compute nodes and storage, with deterministic performance
  • design and implement efficient computing schemes addressing the concurrency and locality challenges
  • build modular, scalable and resilient systems


While the final design phase of ELTs instruments design is starting, this dedicated workshop, as a follow-up to the Durham 2011 and ESO Garching 2012 AO RTC workshops, aims at gathering the community around topics such as (but not limited to):

  • computation hardware present and future
  • platforms including real-time and non real-time
  • software implementation and optimization of real-time control / supervision algorithms
  • software standards and middleware
  • interfaces to cameras, deformable mirrors and networks
  • user interface and system operation
  • performance assessment and system testing
  • system engineering / current status of present / future instruments

Sponsored by the Opticon Program supported by the European Commission's FP7 Capacities programme (Grant number 312430).

  • Armin Schimpf
  • Benoit Neichel
  • Damien Gratadour
  • Elisabeth Brunner
  • Gaetano Sivo
  • Jose Carlos Lopez
  • laura schreiber
  • Laurent Jolissaint
  • Luis Fernando Rodriguez Ramos
  • Malcolm Smith
  • Matthias Rosensteiner
  • Miguel Nuñez Cagigal
  • Noah Schwartz
  • Oscar Tubio Araujo
  • Tuesday, 26 January
    • 14:00 14:30
      Convener: Damien Gratadour
    • 14:30 17:00
      Current and future AO systems
      • 14:30
        AO projects at IAC 20m
        Speaker: Dr Luis Fernando Rodriguez Ramos (IAC)
      • 15:00
        ACEfast adaptive optics real-time controller 20m
        Speaker: Dr Armin Schimpf (ALPAO SAS)
      • 15:30
        NFIRAOS RTC 20m
        Speaker: Mr Malcolm Smith (National Research Council Canada)
      • 16:00
        Scientific requirements and dimensioning for the MICADO-SCAO RTC 20m
        Speaker: Mr Arnaud Sevin
      • 16:30
        Green Flash, energy efficient data intensive real-time computing for AO 20m
        Speaker: Damien Gratadour
  • Wednesday, 27 January
    • 09:30 12:30
      New algorithms
      • 09:30
        Open-loop wavefront control with CuReD 20m
        Speaker: Dr Matthias Rosensteiner (NRC Herzberg - Astronomy & Astrophysics)
      • 10:00
        Suitable Hardware Acceleration of Spline Based Wavefront Reconstruction for Extremely Large Scale AO systems 20m
        Speaker: Elisabeth Brunner (Delft University of Technology)
      • 10:30
        Discussion on new algorithms and corresponding constraints 30m
      • 11:10
        COMPASS, efficient GPU based AO simulations 20m
        Speaker: Florian Ferreira
      • 11:35
        Discussion on simulations 55m
    • 16:30 18:00
      General discussion