Lowering the CLIC IP horizontal beta function

In order to alleviate the beamstrahlung photon emission, the beams at the CLIC Interaction Point (IP) must be flat. We propose to explore this limit reducing the horizontal IP beta function for CLIC at 500 GeV c.o.m. energy to half of its nominal value. This increases the photon emission during collision but it also increases luminosity and mightallow to reduce the bunch charge keeping the same luminosity. This configuration can also be considered for lower energies where beamstrahlung is less critical.