strip and scintillating-fibre detectors were added to investigate systematic effects. On 30 June 2007 at 11:23 pm, HERA was shut down, and dismantling of the four experiments started. HERA's main pre-accelerator PETRA was converted into a synchrotron radiation source, operating under the name PETRA-III since August 2010. See also CLAS LEPS HERMES References External links HERA Page at DESY Buildings and structures in Altona, Hamburg Education in Hamburg Particle physics facilities