Beijing Electron–Positron Collider II
The Beijing Electron–Positron Collider II (BEPC II) is a Chinese electron–positron collider, a type of particle accelerator, located in Beijing, People's Republic of China. It has been in operation since 2008 and has a circumference of 240.4 m.[1]
It was intended as a charm factory and continues the role CLEO-c detector. The center of mass energy can go up to 4.6 GeV with a design luminosity of 1033 cm−2·s−1.[2] Operations began in summer 2008 and the machine has run at multiple energies.
BES III
The BES III (Beijing Spectrometer III) is the main detector[3] for the upgraded BEPC II.
BES III uses a large superconducting solenoid to provide a 1-tesla magnetic field, and also features a helium gas-based tracking chamber and an electromagnetic calorimeter using 6240 caesium iodide crystals.
See also
References
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- ↑ Minnesota BES-III home page
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