Odyssey Gallery

HERA accelerator ring, DESY

HERA accelerator ring. View of part of the HERA accelerator at DESY (Deutsche Elektronen Synchro- tron), Hamburg, Germany. HERA (Hadron Electron Ring Accelerator) consists of a pair of accelerator rings mounted in a 6.3km circumference tunnel. The upper (cream-coloured) ring carries protons, whilst the lower (pink) ring carries electrons in the other direction. At two points on the ring the beams cross providing proton/electron collisions at an energy of 850 GeV. Two large detectors (H1 and ZEUS) will then study these collisions. Data from these detectors will provide information about the quarks inside protons and the gluon force moderators that bind them

© DAVID PARKER/SCIENCE PHOTO LIBRARY

Ulysses Deriding Polyphemus, 1829 (oil on canvas)

1765773 Ulysses Deriding Polyphemus, 1829 (oil on canvas) by Turner, Joseph Mallord William (1775-1851); 132.7x203.2 cm; (add.info.: Ulysses stands on his ship mocking Polyphemus and the other Cyclops, who he and his companions have just blinded, and invoking the vengeance of Neptune. ); English, out of copyright

© Bridgeman Images

Tevatron particle collider at Fermilab

The circular tunnel containing the Tevatron accelerator at the Fermi National Accelerator Laboratory (Fermilab), Illinois, is outlined by the lights of a car driving around the service road above the tunnel. The Tevatron is 2 kilometres in diameter & contains two accelerators one above the other. The top accelerator uses ordinary magnets & accelerates protons to 150 GeV. It then passes them to the lower accelerator, with superconducting magnets, which accelerates them up to 1000 GeV (1 TeV). Beside the service road is a circular "moat" of water to cool the magnets. This 15-minute exposure was taken from the top of Fermilab's 16-floor administration building

© DAVID PARKER/SCIENCE PHOTO LIBRARY