Das beste Metronom der Welt hält den Takt auf zehn trillionstel Sekunden genau und ermöglicht damit Zeitlupenfilme aus der Welt der Moleküle und Atome. Das hat eine Forschergruppe vom Hamburger Center for Free-Electron Laser Science (CFEL) und dem amerikanischen Massachusetts Institute of Technology (MIT) gezeigt. Das Metronom besteht aus speziellen Lasern, die als sogenanntes optisches Schwungrad eingesetzt werden, und ist auf kurzen Zeitskalen der präziseste Taktgeber, den man derzeit kennt, schreibt das Team um Prof. Franz Kärtner vom Deutschen Elektronen-Synchrotron DESY im Fachblatt "Nature Photonics" (DOI: 10.1038/NPHOTON.2011.326). Das CFEL ist eine Kooperation von DESY, der Max-Planck-Gesellschaft und der Universität Hamburg.
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