UPGRADE THE LUMINOSITY WITH DECREASING THE HORIZONTAL CROSSING ANGLE AT THE IP OF KEKB

摘要

In the present routine operation of KEKB, the bunch number is 1154 that is much less than the design value in each ring. The horizontal crossing angle at the interaction point (IP) is 2 x 11 mrad. The luminosity can be increased by reducing the crossing angle. Some calculation and the simulation were made in the paper.