A unique observatory in a remote location in Argentina is starting to unravel the mysteries of High Energy Cosmic Rays. There is no scientific consensus on the source of these particles which the shower the Earth at energies 10 million times higher than can be produced in particle accelerators! But the Pierre Auger Observatory is shedding new light on these energetic particles from space and using them as messengers to tell us more about the wider Universe.
Scientists of the Pierre Auger Observatory will hold a celebration in Malargüe, Argentina, from 9 November to 11 November 2005, to mark the progress of the Observatory and the presentation of the first physics results.
To witness these extremely rare events, the observatory is constructing an array of 1600 detectors spread over 3000 square kilometres (an area roughly the size of Cambridgeshire in the UK) in Argentinas Mendoza Province, just east of the Andes Mountains. Each of these “Cherenkov” detectors contains 3000 gallons of water and detects the electromagnetic ‘shock waves’ as the particles pass through. Surrounding the array is a set of 24 telescopes which, on clear moonless nights, observe the ultraviolet fluorescence light produced as cosmic ray shower particles travel through the atmosphere.
Julia Maddock | alfa
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The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
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