page_title: DESY
section_title: FLASH
hierarchical_section_title: DESY / Particle accelerators, facilities and experiments / FLASH
caption_attribution_description: English: Building of Center for Free-Electron Laser Science, CFEL, at DESY campus in Hamburg.
context_page_description: The Deutsches Elektronen-Synchrotron commonly referred to by the abbreviation DESY, is a national research center in Germany that operates particle accelerators used to investigate the structure of matter. It conducts a broad spectrum of inter-disciplinary scientific research in three main areas: particle and high energy physics; photon science; 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, the States of Germany, and the German Research Foundation. DESY is a member of the Helmholtz Association and operates at sites in Hamburg and Zeuthen.
context_section_description: FLASH (Free-electron -LASer in Hamburg) is a superconducting linear accelerator with a free electron laser for radiation in the vacuum-ultraviolet and soft X-ray range of the spectrum. It originated from the TTF (TESLA Test Facility), which was built in 1997 to test the technology that was to be used in the planned linear collider TESLA, a project which was replaced by the ILC (International Linear Collider). For this purpose the TTF was enlarged from 100 m to 260 m.
  At FLASH technology for the European XFEL is tested as well as for the ILC. Five test experimental areas have been in use since the commissioning of the facility in 2004.
caption: Center for Free-Electron Laser Science, CFEL, at DESY campus in Hamburg.
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