ZEUS (particle detector)

Trabrennbahn Bahrenfeld, located in the Bahrenfeld quarter of Hamburg, Germany, is used for harness racing. It was built in 1867 and renovated in 2011.The track has a capacity of 30,000. Maximum capacity for concerts is 90,000.

Altona Volkspark is a 205-hectare (507-acre) large urban park in the Hamburg district of Bahrenfeld, in the borough of Altona. Ahead of Hamburg Stadtpark, it is the largest park in the Free and Hanseatic City of Hamburg, Germany. Altona Volkspark is located some 3 km off the inner city. The largest parks in the city-center are Planten un Blomen and Alsterpark. Notably, Hamburger SV home ground Volksparkstadion, Barclaycard Arena and Volksbank Arena are located within the park's fringes.

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.

The Positron-Electron Tandem Ring Accelerator (PETRA) is one of the particle accelerators at DESY in Hamburg, Germany. From 1978 to 1986 it was used to study electron–positron collisions. It was here that the TASSO collaboration found the first direct evidence for gluons in three jet events. The modification called PETRA-II is a source of high-energy synchrotron radiation and also a pre-accelerator for the HERA. Started in 2007, an upgrade has been converting it to PETRA-III, which is a high intensity source for synchrotron radiation.

Altona Main Cemetery (German: Hauptfriedhof or Friedhof Altona) is located at Stadiongasse 5, Bahrenfeld, Altona, in north-western Hamburg, Germany and, with an area of 63 hectares, is the fourth largest burial ground in the city and surrounding area. It has been a protected site since the revision of the Hamburg Monument Protection Law (Hamburger Denkmalschutzgesetz) in 2013.

Bahrenfeld is a western quarter of the city of Hamburg in Germany, it is subject to the district/borough Bezirk Altona and was an independent settlement until 1890. It is home to DESY and the Barclaycard Arena. In 2020 the population was 29,652.

The Barclays Arena (originally known as the Color Line Arena and formerly known as barclaycard arena and O2 World Hamburg) is a multipurpose arena in Hamburg, Germany. It opened in 2002 and can hold up to 16,000 people (13,800 or 12,947 for sporting events). It is located at Altona Volkspark, adjacent to the football stadium Volksparkstadion and the Volksbank Arena in Hamburg's western Bahrenfeld district. The arena is primarily used for pop/rock concerts and was the home of handball club HSV Hamburg and ice hockey team Hamburg Freezers until both teams folded in 2016. The Barclaycard Arena is among the most modern venues in Europe.

The Deutsches Elektronen-Synchrotron (English German Electron 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 (DFG). DESY is a member of the Helmholtz Association and operates at sites in Hamburg and Zeuthen.

The particle accelerator DESY (acronym for Deutsches Elektronen-Synchrotron or German Electron Synchrotron) was the first particle accelerator of the DESY research centre in Hamburg and the one that gave the research centre its name. The DESY synchrotron was used for research in particle physics from 1964 to 1978 and served as a pre-accelerator for other accelerator facilities at DESY.Construction of the synchrotron started in 1960. With a circumference of 300 m, it was the world's largest facility of its kind in the world and accelerated electrons to 7.4 GeV. The first electrons circulated in the acceleration on 25 February 1964, and research activities into elementary particles at the DESY synchrotron started in May 1964. In the experiments carried out at DESY, the electron beams were directed at fixed targets.

Othmarschen railway station is on the Altona-Blankenese line and served by the city trains, located in Hamburg, Germany. The station was opened in 1897. The rapid transit trains of the line S1 and the line S11 of the Hamburg S-Bahn calls the station in the quarter Othmarschen of the Altona borough. Right along the railway tracks is the border to the quarter Groß Flottbek.

H1 was a particle detector that operated at HERA (Hadron Elektron Ring Anlage) in DESY, Hamburg. The first studies for the H1 experiment have proposed in 1981 and the H1 detector began operating together with HERA in 1992 and took data until 2007. The detector consisted of several different detector components and was about 12 x 15 x 10 meters big and weighs 2800 tons. It was accompanied by further detectors in both directions of the HERA accelerator and by an electronics trailer three stories high. The main physics goals of the H1 experiment were the investigation of the internal structure of the proton through measurements of deep inelastic scattering, the measurements of further cross sections to study fundamental interactions between particles in order to test the Standard Model of particle physics, as well as searching for particles beyond the Standard Model. The name H1 is used for both, the detector itself and the collaboration of physicists and technicians who operated the experiment.

Montblanc (UK: /ˌmɒ̃ˈblɒ̃(k)/, US: /ˌmɑnˈblɑŋk/) is a German manufacturer and distributer of luxury goods, founded in Berlin in 1906, and currently based in Hamburg. The company is most known for its luxury pens and also designs and distributes bags, small leather goods, and watches.