Editing CERN (section)

== Sites ==
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[[File:CERN Building 40 (1).jpg|thumb|CERN building 40 at the Meyrin site]]
[[File:Bldng40cropped.jpg|thumb|The interior of office building 40 at the Meyrin site. Building 40 hosts many offices for scientists from the CMS and ATLAS collaborations.]]

The smaller accelerators are on the main [[Meyrin]] site, also known as the West Area, which was originally built in Switzerland alongside the French border, but has been extended to span the border since 1965. The French side is under Swiss jurisdiction and there is no obvious border within the site, apart from a line of marker stones.

The SPS and LEP/LHC tunnels are almost entirely outside the main site, and are mostly buried under French farmland and invisible from the surface. They have surface sites at points around them, either as the location of buildings associated with experiments or other facilities needed to operate the colliders such as [[Cryonics|cryogenic]] plants and access shafts. The experiments are located at the same underground level as the tunnels at these sites.

Three of these experimental sites are in France, with ATLAS in Switzerland, and some of the ancillary cryogenic and access sites are in Switzerland. The largest of the experimental sites is the [[Prévessin]] site, also known as the North Area, which is the target station for non-collider experiments on the SPS accelerator. Other sites are the ones which were used for the [[UA1 experiment|UA1]], [[UA2 experiment|UA2]] and the LEP experiments. The latter are used by LHC experiments.

Outside of the LEP and LHC experiments, most are officially named and numbered after the site where they were located. For example, [[NA32 experiment|NA32]] was an experiment looking at the production of so-called "[[charm quark|charmed]]" particles and located at the Prévessin (North Area) site. [[WA22 experiment|WA22]] used the [[Big European Bubble Chamber]] (BEBC) at the Meyrin (West Area) site to examine neutrino interactions. The [[UA1 experiment|UA1]] and [[UA2 experiment|UA2]] experiments were considered to be in the Underground Area, i.e. situated underground at sites on the SPS accelerator.

Most of the [[List of streets at CERN|roads on the CERN Meyrin and Prévessin sites]] are named after famous physicists, such as [[Wolfgang Pauli]], who pushed for CERN's creation. Other notable names are [[Richard Feynman]], [[Albert Einstein]], and [[Niels Bohr|Bohr]].