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Published on Dec 17, 2013
The Stanford Positron Electron Accelerating Ring (SPEAR) at SLAC was completed in 1972 and has been used by physicists to discover new particles, most notably the J/psi in 1974 and the tau in 1976. Since then it has undergone two major updates and, now known as SPEAR3, the ring is used exclusively for synchrotron radiation physics at the Stanford Synchrotron Radiation Lightsource (SSRL).
Each year SPEAR3 is shut down for annual maintenance. During this year's shutdown Craig Haggart, an operator at SPEAR3, showed us around and told us a bit about how SPEAR3 works.