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Several scenarios are considered for the upgrade of the LHC insertions in view of increasing the luminosity beyond 10 34 cm-2 s-1. In the case of " quadrupole first " option, superconducting low-β quadrupoles with apertures in the range of 90-110 mm are required in view of increased heat loads and beam crossing angles. We present possible low-β quadrupole(More)
An optical performance's improvement of the interaction region can be obtained with the addition of new quadrupoles in the forward detectors area. Such scenario would allow decreasing the β * below the nominal value. The basic concept consists in using quadrupoles to break the quadratic behavior of β in the free space between the IP and the IR triplets. In(More)
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