SKADS in Europe

Square Kilometre Array Design Studies  
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SKA - A hybrid design

To provide a million square metres of aperture at an acceptable cost the Square Kilometre Array must make a revolutionary break with current radio telescopes. There are six demonstrators being considered as a possible antenna options for the SKA. Many different technological solutions will be selected and integrated into the final instrument. The selection of the design concept will be made in early 2009.

SKA should cover the frequency range ~0.1 to ~20GHz which is likely to involve at least two technologically different antenna concept.

The European SKA Consortium has adopted the aperture array concept as most promising to cover the science goals associated with observations to be conducted at low frequencies (0.1 – 2.0GHz).

The reflector based antennas are more suited for higher frequency range i.e. > 1GHz and therefore they are considered for the higher end of the SKA frequency region. The Aperture Array concept therefore offers maximum opportunity for forming a hybrid antenna with any of the other five reflector based antennas proposed for SKA.

In fact the ISSC has considered the Aperture Array as one of the two possible hybrid for further analysis. This hybrid will soon be submitted to the International Ska Steering Commitee for further evaluation.

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Why do we build demonstrators?

As with other consortia involved in the SKA, SKADS is building demonstrators in order to get a new type of instrument functional and to demonstrate the required cost factor will be very substantial contribution to radio science. The installation will be a first step to illustrating the infrastructure needs of such an instrument.

Moreover, to be considered in the 2009 SKA selection process, the proponents must have constructed and tested 'engineering / proof of concept demonstrators' and must have undertaken and assimilated a wide range of complementary R&D scientific and technical feasibility and assessment studies.

Among other consortia building demonstrators are the USA with the Allen Telescope Array based on a small parabolas concept.

Results with early demonstrators inside Astron were called OSMA and THEA.

SKA: An Engineering Perspective More about technologies
Book: "The Square Kilometre Array: An Engineering Perspective" P.Hall ed.
Springer, 2005 - Experimental astronomy, Vol 17, Nos 1-3, 2004
Articles: Table of contents | Order
last update 2009 April 27, 16:48 by Steve Torchinsky