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The Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung m. b. H. (''English'': Berlin Electron Storage Ring Society for Synchrotron Radiation), abbreviated ''BESSY'', is a research establishment in the Adlershof district of Berlin. Founded on 5 March 1979, it currently operates one of Germany's 3rd generation synchrotron radiation facilities, BESSY II. Originally part of the Gottfried Wilhelm Leibniz Scientific Community, BESSY now belongs to the Helmholtz-Zentrum Berlin (since 1 January 2009). Owing to the radiometry lab of the PTB (), BESSY is the European calibration standard for electromagnetic radiation.〔(BESSY webpage: About BESSY - an ultimate space and time microscope )〕 BESSY supplies synchrotron light and provides support for science and industry. There are institutional long-time users, like the Max-Planck-Society, the German Federal Institute for Materials Research and Testing (BAM) and the national metrology institute of Germany (the PTB). Furthermore, research groups from other institutes or universities can apply for utilization (so called ''beam time'') for certain projects. == BESSY I == This original synchrotron facility, costing the equivalent of 66.5 million Euro, became operational on 19 December 1981. It was situated in Wilmersdorf, then a borough of Berlin. The storage ring had a circumference of approx. 60 m. The circulating electrons that provided the radiation were in the energy range of 200 to 800 MeV (Vacuum Ultraviolet through Extreme Ultraviolet). After its decommissioning in 1999, the component parts of the BESSY I machine were donated to the SESAME project by the German Authorities and have consequently been shipped to Jordan.〔(Transportation of BESSY I Component Parts )〕 Famous achievements of BESSY I were the calibration of the spectrometers for the solar oberservatory probe SOHO as well as for the detectors for the Chandra X-ray Observatory 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「BESSY」の詳細全文を読む スポンサード リンク
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