Explanipedia

Suitability of GPUs for real-time control of large astronomical adaptive optics instruments Open

Urban Bitenc, Alastair Basden, N. A. Dipper, Richard M. Myers · 2017

Adaptive optics (AO) is a technique for correcting aberrations introduced when light propagates through a medium, for example, the light from stars propagating through the turbulent atmosphere. The components of an AO instrument are: (1) a…

Fpga-Based High Bandwidth Integral Electron Density Interferometer For Mast-U Open

K. J. Brunner, T. O’Gorman, Graham Naylor, R. Scannell, Geoffrey Cunningham , et al. · 2016

Modifications to the synthetic aperture microwave imaging diagnostic Open

K. J. Brunner, J. C. Chorley, N. A. Dipper, G. Naylor, R. M. Sharples , et al. · 2016

The synthetic aperture microwave imaging diagnostic has been operating on the MAST experiment since 2011. It has provided the first 2D images of B-X-O mode conversion windows and showed the feasibility of conducting 2D Doppler back-scatter…

Final two-stage MOAO on-sky demonstration with CANARY Open

É. Gendron, Tim Morris, Alastair Basden, F. Vidal, David Atkinson , et al. · 2016

CANARY is an on-sky Laser Guide Star (LGS) tomographic AO demonstrator in operation at the 4.2m William Herschel Telescope (WHT) in La Palma. From the early demonstration of open-loop tomography on a single deformable mirror using natural …

GPU-Based Data Processing for 2-D Microwave Imaging on MAST Open

J. C. Chorley, R. Akers, K. J. Brunner, N. A. Dipper, S. J. Freethy , et al. · 2016

The Synthetic Aperture Microwave Imaging (SAMI) diagnostic is a Mega Amp Spherical Tokamak (MAST) diagnostic based at Culham Centre for Fusion Energy. The acceleration of the SAMI diagnostic data-processing code by a graphics processing un…

Experience with wavefront sensor and deformable mirror interfaces for wide-field adaptive optics systems Open

Alastair Basden, David Atkinson, Nazim A. Bharmal, Urban Bitenc, Matthieu Brangier , et al. · 2016

Recent advances in adaptive optics (AO) have led to the implementation of wide field-of-view AO systems. A number of wide-field AO systems are also planned for the forthcoming Extremely Large Telescopes. Such systems have multiple wavefron…

Reducing adaptive optics latency using Xeon Phi many-core processors Open

David R. W. Barr, Alastair Basden, N. A. Dipper, Noah Schwartz · 2015

The next generation of Extremely Large Telescopes (ELTs) for astronomy will rely heavily on the performance of their adaptive optics (AO) systems. Real-time control is at the heart of the critical technologies that will enable telescopes t…

On-sky tests of the CuReD and HWR fast wavefront reconstruction algorithms with CANARY Open

Urban Bitenc, Alastair Basden, Nazim A. Bharmal, Tim Morris, N. A. Dipper , et al. · 2015

CuReD (Cumulative Reconstructor with domain Decomposition) and HWR (Hierarchical Wavefront Reconstructor) are novel wavefront reconstruction algorithms for the Shack–Hartmann wavefront sensor, used in the single-conjugate adaptive optics. …

Reducing adaptive optics latency using many-core processors Open

David R. W. Barr, Alastair Basden, N. A. Dipper, Noah Schwartz · 2015

The high control frequency required of planned E-ELT adaptive optics modules (from several hundreds of Hz tothousands and typically in the region of 500 Hz for first light E-ELT instruments such as HARMONI), along withthe high number of ac…

Durham AO Real-time Controller (DARC) running on Graphics Processing Units (GPUs) Open

Urban Bitenc, Alastair Basden, N. A. Dipper, Richard M. Myers · 2015

The requirements on the real-time control systems for ELT instruments strongly encourage an investigation of newly emerging hardware and an assessment of its suitability for the job. We have implemented the full AO data processing pipeline…

Laser-only AO, readout noise studies and AO verification and integration for ELTs Open

Alastair Basden, Tim Morris, Richard M. Myers, N. A. Dipper, É. Gendron , et al. · 2015

We present a concept for visible near-diffraction limited lucky imaging with full-sky laser assisted adaptive optics.Simulation results are given, along with first on-sky measurements taken with the CANARY AO system on theWilliam Herschel …

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