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DELPHI at LEP

There are four regions on the LEP ring where the beams are brought together to collide with each other. Around these interaction points experiments are built to detect and measure the properties of the particles coming out from the e⁺e^- collision. The DELPHI (DEtector with Lepton, Photon and Hadron Identification) experiment (fig 2.2) was built to put special emphasis on powerful particle identification. To accomplish this, it is equipped with the largest super conducting magnet in the world, with a diameter of 5.2 meters and a length of 7.2 meters. DELPHI itself is about ten meters long and has a weight of about 3500 tons. The experiment is built up of 20 sub-detectors that can be subdivided into four categories.

**Figure 2.2:** The DELPHI experiment with its subdetectors.
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Subsections

Andreas Nygren
2001-10-24