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- Hadron_Elektron_Ring_Anlage abstract "HERA (German: Hadron-Elektron-Ringanlage, English: Hadron-Electron Ring Accelerator) was a particle accelerator at DESY in Hamburg. It began operating in 1992. At HERA, electrons or positrons were collided with protons at a center of mass energy of 318 GeV. It was the only lepton-proton collider in the world while operating. Also, it was on the energy frontier in certain regions of the kinematic range. HERA was closed down on 30 June 2007.The HERA tunnel is located under the DESY site and the nearby Volkspark around 15 to 30 m underground and has a circumference of 6.3 km. Leptons and protons were stored in two independent storage rings on top of each other inside this tunnel.There are four interaction regions, which were used by the experiments H1, ZEUS, HERMES and HERA-B. All these experiments were particle detectors.Leptons (electrons or positrons) were pre-accelerated to 450 MeV in the linear accelerator LINAC-II. From there they were injected into the storage ring DESY-II and accelerated further to 7.5 GeV before their transfer into PETRA, where they were accelerated to 14 GeV. Finally they were injected into their storage ring in the HERA tunnel and reached a final energy of 27.5 GeV. This storage ring was equipped with warm (non-superconducting) magnets keeping the leptons on their circular track by a magnetic field of 0.17 Tesla.Protons were obtained from originally negatively charged hydrogen ions and pre-accelerated to 50 MeV in a linear accelerator. They were then injected into the proton synchrotron DESY-III and accelerated further to 7 GeV. Then they were transferred to PETRA where they were accelerated to 40 GeV. Finally, they were injected into their storage ring in the HERA tunnel and reached their final energy of 920 GeV. The proton storage ring used superconducting magnets to keep the protons on track.The lepton beam in HERA became naturally transversely polarised through the Sokolov-Ternov effect. The characteristic build-up time expected for the HERA accelerator was approximately 40 minutes. Spin rotators on either side of the experiments changed the transverse polarisation of the beam into longitudinal polarisation. The positron beam polarisation was measured using two independent polarimeters, the transverse polarimeter (TPOL) and the longitudinal polarimeter (LPOL). Both devices exploit the spin-dependent cross section for Compton scattering of circularly polarised photons off positrons to measure the beam polarisation. The transverse polarimeter was upgraded in 2001 to provide a fast measurement for every positron bunch, and position-sensitive silicon 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.".
- Hadron_Elektron_Ring_Anlage thumbnail HERA_Tunnel.JPG?width=300.
- Hadron_Elektron_Ring_Anlage wikiPageExternalLink index_eng.html.
- Hadron_Elektron_Ring_Anlage wikiPageID "1239321".
- Hadron_Elektron_Ring_Anlage wikiPageLength "4413".
- Hadron_Elektron_Ring_Anlage wikiPageOutDegree "35".
- Hadron_Elektron_Ring_Anlage wikiPageRevisionID "629691510".
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink CLAS_detector.
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink Category:Buildings_and_structures_in_Hamburg.
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink Category:Education_in_Hamburg.
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink Category:Particle_physics_facilities.
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink Center_of_mass.
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink Circumference.
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink Compton_scattering.
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink DESY.
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink Electron.
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink Electronvolt.
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink Energy.
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink H1_(particle_detector).
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink HERA-B.
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink HERMES_experiment.
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink Hamburg.
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink Hydrogen.
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink Interaction_point.
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink Ion.
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink Lepton.
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink Particle_accelerator.
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink Particle_detector.
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink Positron.
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink Positron-Electron_Tandem_Ring_Accelerator.
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink Proton.
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink SPring-8.
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink SVD_experiment.
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink Sokolov–Ternov_effect.
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink Synchrotron_radiation.
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink Tesla_(unit).
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink ZEUS_(particle_detector).
- Hadron_Elektron_Ring_Anlage wikiPageWikiLink File:HERA_Tunnel.JPG.
- Hadron_Elektron_Ring_Anlage wikiPageWikiLinkText "HERA particle accelerator".
- Hadron_Elektron_Ring_Anlage wikiPageWikiLinkText "HERA".
- Hadron_Elektron_Ring_Anlage wikiPageWikiLinkText "Hadron Elektron Ring Anlage (HERA)".
- Hadron_Elektron_Ring_Anlage wikiPageWikiLinkText "Hadron Elektron Ring Anlage".
- Hadron_Elektron_Ring_Anlage wikiPageWikiLinkText "hadron-electron ring facility HERA".
- Hadron_Elektron_Ring_Anlage wikiPageUsesTemplate Template:Coord_missing.
- Hadron_Elektron_Ring_Anlage wikiPageUsesTemplate Template:Lang-de.
- Hadron_Elektron_Ring_Anlage wikiPageUsesTemplate Template:Lang-en.
- Hadron_Elektron_Ring_Anlage wikiPageUsesTemplate Template:Otheruses.
- Hadron_Elektron_Ring_Anlage wikiPageUsesTemplate Template:Reflist.
- Hadron_Elektron_Ring_Anlage wikiPageUsesTemplate Template:Use_dmy_dates.
- Hadron_Elektron_Ring_Anlage subject Category:Buildings_and_structures_in_Hamburg.
- Hadron_Elektron_Ring_Anlage subject Category:Education_in_Hamburg.
- Hadron_Elektron_Ring_Anlage subject Category:Particle_physics_facilities.
- Hadron_Elektron_Ring_Anlage hypernym Accelerator.
- Hadron_Elektron_Ring_Anlage type Company.
- Hadron_Elektron_Ring_Anlage type Facility.
- Hadron_Elektron_Ring_Anlage type Laboratory.
- Hadron_Elektron_Ring_Anlage comment "HERA (German: Hadron-Elektron-Ringanlage, English: Hadron-Electron Ring Accelerator) was a particle accelerator at DESY in Hamburg. It began operating in 1992. At HERA, electrons or positrons were collided with protons at a center of mass energy of 318 GeV. It was the only lepton-proton collider in the world while operating. Also, it was on the energy frontier in certain regions of the kinematic range.".
- Hadron_Elektron_Ring_Anlage label "Hadron Elektron Ring Anlage".
- Hadron_Elektron_Ring_Anlage sameAs Q1054761.
- Hadron_Elektron_Ring_Anlage sameAs Hadron_Elektron_Ring_Anlage.
- Hadron_Elektron_Ring_Anlage sameAs Hadron_Elektron_Ring_Anlage.
- Hadron_Elektron_Ring_Anlage sameAs HERA.
- Hadron_Elektron_Ring_Anlage sameAs m.04l7pd.
- Hadron_Elektron_Ring_Anlage sameAs HERA.
- Hadron_Elektron_Ring_Anlage sameAs HERA.
- Hadron_Elektron_Ring_Anlage sameAs Q1054761.
- Hadron_Elektron_Ring_Anlage wasDerivedFrom Hadron_Elektron_Ring_Anlage?oldid=629691510.
- Hadron_Elektron_Ring_Anlage depiction HERA_Tunnel.JPG.
- Hadron_Elektron_Ring_Anlage isPrimaryTopicOf Hadron_Elektron_Ring_Anlage.