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SPEAR

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Stanford University

SPEAR (originally Stanford Positron Electron Asymmetric Rings, now simply a name) was a collider at the SLAC National Accelerator Laboratory. It began running in 1972, colliding electrons and positrons with an energy of 3 GeV. During the 1970s, experiments at the accelerator played a key role in particle physics research, including the discovery of the J/ψ meson (awarded the 1976 Nobel Prize in physics), many charmonium states, and the discovery of the tau (awarded the 1995 Nobel Prize in physics). Today, SPEAR is used as a synchrotron radiation source for the Stanford Synchrotron Radiation Lightsource (SSRL). The latest major upgrade of the ring in that finished in 2004 rendered it the current name SPEAR3.

Excerpt from the Wikipedia article SPEAR (License: CC BY-SA 3.0, Authors).

Geographical coordinates (GPS)

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N 37.41847 ° E -122.20116 °
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Address

Stanford Linear Accelerator Center National Accelerator Laboratory (SLAC National Accelerator Laboratory)

Sand Hill Road 2575
94028
California, United States
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Website
www6.slac.stanford.edu

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