Back مسرع ديزي Arabic DESY Bulgarian DESY Catalan DESY Danish Deutsches Elektronen-Synchrotron German DESY Spanish دسی (شتابدهنده) FA DESY Finnish Deutsches Elektronen-Synchrotron French DESY Hungarian
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| Motto | "The Decoding of Matter" |
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| Established | 18 December 1959 |
| Research type | Fundamental research |
| Budget | c. € 232 million (2020) |
Field of research | |
| Director | Helmut Dosch |
| Staff | 2,700 (plus over 3,000 guest scientists p.a.) |
| Students | c. 500 PhD students and postdocs |
| Address | Notkestraße 85, 22607 Hamburg, Germany Platanenallee 6, 15738 Zeuthen, Germany |
| Location | 53°34′33″N 9°52′46″E / 53.57583°N 9.87944°E 52°22′00″N 13°37′00″E / 52.36667°N 13.61667°E |
| Campus | Hamburg-Bahrenfeld, Zeuthen |
| Affiliations | Helmholtz Association |
| Website | desy |
| Map | |
  Location in Germany | |
DESY, short for Deutsches Elektronen-Synchrotron (English: German Electron Synchrotron), is a national research centre for fundamental science located in Hamburg and Zeuthen near Berlin in Germany. It operates particle accelerators used to investigate the structure, dynamics and function of matter, and conducts a broad spectrum of interdisciplinary scientific research in four main areas: particle and high energy physics; photon science; astroparticle physics; and the development, construction and operation of particle accelerators. Its name refers to its first project, an electron synchrotron. DESY is publicly financed by the Federal Republic of Germany and the Federal States of Hamburg and Brandenburg and is a member of the Helmholtz Association.