Dark Matter On The Verge Of Revealing Itself: University Of Chicago Scientists
Scientists from University of Chicago have detected an evidence of presence of dark matter which has since its beginning, eluded its detection from even the most advanced sciences. “Dark matter†consists of about 90% matter present in universe but still it lies undetected because it does not interact with light.
University of Chicago scientists with their Coherent Germanium Neutrino Technology (CoGeNT) experiment have recorded the seasonal changes in amount of dark matter. The concept on which they were working was the sun throughout the year moves through a sea of dark matter. The earth though while revolving around the sun, shifts its way slightly away from it during winters, then during summers, the earth’s path is again aligned towards the sun. When the earth is nearest to Sun, it also moves through the sea of dark matter and when it is farthest, it tackles a little less amount of dark matter. This seasonal change in amount of dark matter surfed by Earth was detected by CoGeNT. The CoGeNT sensed the Weakly Interacting Massive Particles (WIMP) colliding with the detector.
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The laboratory built for this purpose is located in Soudan mines, Minnesota, Japan. Scientist Juan Collar and his team has thus recorded the variation for 441 days and studied data. The results gathered by this study are compatible with the DAMA/LIBRA experiment ten years ago. In that experiment, researchers had placed a 250Kg lump of Sodium Iodide doped with thallium to detect the amount of dark matter. The results were mixed, however they are now supported with CoGeNT.
The WIMP is a particle of Dark Matter which moves around randomly as we invisible to us. The experiment ran for about 15 months detecting about 1 WIMP collision per day. However, the experiments were affected by a fire eruption in Soudan mines in March 2011. It was actually set back as the CoGeNT apparatus is kept at a temperature of 90K. The fire hazard meant that the apparatus went through a complete thermodynamic cycle thereby changing the vacuum maintained by the apparatus.
The study is an important step in the detection of dark matter, which may be a useful concept for us in future. Once the properties of this invisible dark matter are known to mankind, it would pave a way for further futuristic discoveries and invention. The current findings in the study are presented in  Physical review letter by John Orrell of Pacific Northwest National Laboratory and Juan Collar, associate professor in physics at the University of Chicago.
Source: New data still have scientists in dark over dark matter
University of Chicago scientists with their Coherent Germanium Neutrino Technology (CoGeNT) experiment have recorded the seasonal changes in amount of dark matter. The concept on which they were working was the sun throughout the year moves through a sea of dark matter. The earth though while revolving around the sun, shifts its way slightly away from it during winters, then during summers, the earth’s path is again aligned towards the sun. When the earth is nearest to Sun, it also moves through the sea of dark matter and when it is farthest, it tackles a little less amount of dark matter. This seasonal change in amount of dark matter surfed by Earth was detected by CoGeNT. The CoGeNT sensed the Weakly Interacting Massive Particles (WIMP) colliding with the detector.
#-Link-Snipped-#
The laboratory built for this purpose is located in Soudan mines, Minnesota, Japan. Scientist Juan Collar and his team has thus recorded the variation for 441 days and studied data. The results gathered by this study are compatible with the DAMA/LIBRA experiment ten years ago. In that experiment, researchers had placed a 250Kg lump of Sodium Iodide doped with thallium to detect the amount of dark matter. The results were mixed, however they are now supported with CoGeNT.
The WIMP is a particle of Dark Matter which moves around randomly as we invisible to us. The experiment ran for about 15 months detecting about 1 WIMP collision per day. However, the experiments were affected by a fire eruption in Soudan mines in March 2011. It was actually set back as the CoGeNT apparatus is kept at a temperature of 90K. The fire hazard meant that the apparatus went through a complete thermodynamic cycle thereby changing the vacuum maintained by the apparatus.
The study is an important step in the detection of dark matter, which may be a useful concept for us in future. Once the properties of this invisible dark matter are known to mankind, it would pave a way for further futuristic discoveries and invention. The current findings in the study are presented in  Physical review letter by John Orrell of Pacific Northwest National Laboratory and Juan Collar, associate professor in physics at the University of Chicago.
Source: New data still have scientists in dark over dark matter
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