Speaker
Description
The most recent Beam Delivery System (BDS) performance results reported for CLIC at 1.5~TeV are based on the 3~TeV lattice operating at reduced energy. A new, dedicated BDS has therefore been developed for the 1.5 TeV stage, exploiting the reduced impact of radiation effects at lower energy. The new design benefits from an increase in average dispersion, enabling weaker chromaticity-correcting sextupoles, thereby easing the mitigation of nonlinear effects. The impact of higher-order optical aberrations on luminosity performance has been analysed to guide an optimisation strategy that suppresses the most significant contributions to the beam size. The optimised BDS yields substantially higher luminosity performance than earlier configurations while achieving a more compact layout.
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