KEKB is a high-luminosity electron–positron collider, consisting of an 8?GeV electron ring and a 3.5?GeV positron ring. To achieve the required luminosity, beams are squeezed to become very sharp and a large number of particles are stored in the rings. In order to operate the KEKB rings smoothly under a very high-current environment, we developed a user-friendly filling-pattern generating system. With the help of high-speed bunch-current measuring systems, it contributed to the stable operation of the collider rings.
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