The telescope is located at almost 3,000 metres altitude, in the Roque de los Muchachos of La Palma island. The installation involved highly delicate manoeuvres, given the great size and weight of the structures being handled as well as the complexity and vulnerability of its structure and instrumentation.
The procedure was to lift the rotators, hoisting them on to the platform, fit them into their definitive position and align them with the optical axes of the telescope.
The Canary Islands Great Telescope is located in one of the three best places on the planet for quality of astronomic observations, due to their clear skies. Its primary mirror is made up of a mosaic of 36 hexagonal vitroceramic elements that fit together in such a way that it they form a surface area equivalent to that of a 10.4 m diameter mirror that is parabolic and has a circular perimeter. Thus, next year when it is inaugurated, the “Grantecan” will be the telescope with the largest segmented primary mirror in the world.
The Nasmyth rotators developed by Tekniker are two twinned systems, fitted either side of the main structure of the telescope, the aim of which being to move and position the instrument with precision in response to movements of stars. In mechanical terms, the Nasmyth rotators of the GTC telescope are made up of a main support structure and a mobile structure of two bearings, the first being a reference and anchor for the various instruments integrated in the installation, the second bearing on which the capture and guidance system of the telescope is supported. Both structures are united by means of a a set of roll cross bearings that enable a very high level of smoothness of rotation while providing high rigidity to the structure. The operation of the rotators is carried out by direct actuators based on synchronous linear motors. These motors are made up of 20 independent stators inserted in the fixed support structure and a rotor of permanent magnets located on the mobile structure. The measurement of the angular position, which is, at the same time, a feedback system for the links between speed and position, is undertaken by means of a encoded tape fixed to the mobile structure and six reader heads inserted in the fixed structure. The mobile structure itself carries out, moreover, the rotation of the cables and conductors that are necessary for both the instruments of observation and the system of capture and guidance system of the telescope.
This venture places Tekniker amongst the select few suppliers of mecatronics who are able to take on projects of this level of exigency and risk. All of this has been made possible by the proven capacity of Tekniker in technologies such as the magnetic positioning and displacement, control, precision and metrology of large structures.
Over the next few months and when all the various activities around the Great Telescope of the Canaries allow, our technical personnel will put their final touches to the work, the fitting and plaiting of the cables and placing them in a drag chain and the final acceptance trials before putting the rotators into operation. After a few more months, humanity will have a great new eye open to the Universe and its correct functioning will be in part due to Basque technology.
Irati Kortabitarte | alfa
What happens when we heat the atomic lattice of a magnet all of a sudden?
17.07.2018 | Forschungsverbund Berlin
Subaru Telescope helps pinpoint origin of ultra-high energy neutrino
16.07.2018 | National Institutes of Natural Sciences
For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.
To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...
For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.
Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...
Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.
A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...
Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.
"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....
Ultra-short, high-intensity X-ray flashes open the door to the foundations of chemical reactions. Free-electron lasers generate these kinds of pulses, but there is a catch: the pulses vary in duration and energy. An international research team has now presented a solution: Using a ring of 16 detectors and a circularly polarized laser beam, they can determine both factors with attosecond accuracy.
Free-electron lasers (FELs) generate extremely short and intense X-ray flashes. Researchers can use these flashes to resolve structures with diameters on the...
13.07.2018 | Event News
12.07.2018 | Event News
03.07.2018 | Event News
17.07.2018 | Information Technology
17.07.2018 | Materials Sciences
17.07.2018 | Power and Electrical Engineering