Electronics Production | June 30, 2010
<em>IceCube</em> Neutrino Observatory relies on ADI components
Buried two kilometers under solid ice on one of the coldest continents on Earth, Analog Devices’ data converters and amplifiers are helping scientists at the South Pole build the world’s largest telescope.
The innovative “underground” telescope project is called IceCube and uses a cubic kilometer of pure, ultra-translucent ice at the South Pole as a telescopic “window” or particle detector to search the universe for its smallest known particles, called neutrinos (See movies and animations on IceCube and how it works). Neutrinos are subatomic particles that lack an electric charge produced by the decay of radioactive elements and elementary particles. Neutrinos travel at near the speed of light and are so tiny that they can typically pass through solid matter without colliding with any atoms. However when neutrinos collide with an atom, light energy is emitted that can help detect the presence and direction of these sub-atomic particles. IceCube will search for neutrinos from the most violent astrophysical sources, including events like exploding stars, gamma ray bursts, and cataclysmic phenomena involving black holes and neutron stars. The IceCube telescope is a powerful tool to search for dark matter, and could reveal new physical processes associated with the enigmatic origin of the highest energy particles in nature. IceCube uses Antarctica’s ice sheet as the largest instrumented volume of ice/water in the world. Neutrinos passing through the ice sheet collide with atoms creating a blue light at impact that can be detected by IceCube’s digital optical modules (DOMS). Analog Devices’ data converters and amplifiers are installed in more than 5,000 of these DOMS. The DOMs, which are 13–inch-diameter glass pressure spheres, are deployed under the ice on a cable at depths of between 1.5 km and 2.5 km. Over the next 25 years while embedded in ice, the DOMs will detect and transmit experimental data about particle collisions. "We needed low-power, reliable products capable of providing the longevity needed for this project, especially on the main board in the DOMs. Design teams at Lawrence Berkeley National Laboratory (LBNL) and the University of Wisconsin-Madison used ADI data converters and amplifiers that fit our needs and requirements," said Jerry Przyblski, LBNL design engineer. The construction of the IceCube underground telescope will be completed in 2011. The National Science Foundation awarded the University of Wisconsin lead responsibility in building IceCube. The project is a collaboration among researchers from around the world, including Belgium, Germany, The Netherlands, Switzerland, Japan, the United Kingdom, New Zealand and Sweden.
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