Abstract
The collimation system of the future LHC at CERN is a challenging project, since the transverse energy intensities of the LHC beams are three orders of magnitude greater than at other current facilities. The two cleaning insertions (IR3 and IR7) housing the collimators will be among the most radioactive areas of LHC. The 1.5 km long IR7 insertion was fully implemented with the Monte Carlo cascade code FLUKA. Extensive simulations were performed to estimate the radiation level along the tunnel, as well as the energy deposition in the most critical elements. In particular, this paper discusses the latest results of the FLUKA studies, including the design of passive absorbers (to protect warm magnets) and a comparison of W and Cu as material for the active absorber jaws (to protect cold magnets). Any electronic device operating in strong radiation fields such as those expected for the LHC tunnel will undergo degradation. A shielding study was done to reduce radiation damage to the electronics.
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