Speaker
Description
IHEP is exploring potential schemes for BEPCII to adopt the crab-waist scheme to further increase luminosity and conduct relevant experimental research. Considering that BEPCII is an existing machine, the upgrade and modification must accommodate the existing tunnel geometry and detector spatial arrangement. It is preferable to make only local adjustments or modifications to the lattice. We plan to simultaneously modify both the collision region and the inner ring injection region of the existing BEPCII, aiming to achieve 10 times luminosity increase in the 1.0 GeV to 1.89 GeV energy range while retaining the BESIII detector. A small damping ring has been considered in the existing Linac tunnal to reduce the emittance of the injection beam, and hence to support the crab waist scheme in the colliding ring. By adding a compact damping ring to the linear accelerator, we also hope to achieve the physics operation in a new energy range below 1 GeV.
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