Challenging beam-induced energy deposition issues are addressed for the next generation of the LHC high-luminosity interaction regions based on ${\mathrm{Nb}}_3\mathrm{Sn}$ quadrupoles. Detailed mars15 Monte Carlo energy deposition calculations are performed for various coil diameters, thicknesses, and materials of the inner absorber at a field gradient of $200\mathrm{T}/\mathrm{m}$. It is shown that using the inner absorber made of tungsten-based materials can make the final focus superconducting quadrupoles compatible with a luminosity of ${10}^{35}{\mathrm{cm}}^{-2}{\mathrm{s}}^{-1}$.

• Received 31 July 2006

DOI:https://doi.org/10.1103/PhysRevSTAB.9.101001

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