SAES~® Getters' Ultra-High Vacuum Pumps boost UHV conditions in Beijing Electron Positron Collider (BEPC 2)

摘要

Ranked among the eight largest high-energy accelerator centers in the world, the Beijing Electron-Positron Collider - BEPC Ⅱ has been recently upgraded to improve its performance by one hundred times the previous level. The old storage ring has been replaced by a new double ring, with a circumference of 240 meters, which enables electrons and positrons to move in their own rings and to collide with each other at defined interaction points. Phenomena originating from these subatomic collisions help scientists study the fundamental properties of the basic building blocks of matter, deepening understanding about the laws of the physical world.