Conceptual Design of the LHC Interaction Region Upgrade - Phase-I

TLDR

The LHC is beginning operation with beam, and CERN aims to run it efficiently to reach nominal performance quickly, while the community has long discussed phased upgrades of experiments, the machine, and injectors to maximize physics reach. This report presents the goals and conceptual solutions for the LHC IR Upgrade Phase‑I, including recommendations from the conceptual design review. The upgrade relies on mature Nb‑Ti superconducting magnet technology to raise luminosity to 2–3 × 10³⁴ cm⁻² s⁻¹ while maximizing existing infrastructure. The first phase of the LHC interaction region upgrade was approved by the Council in December 2007.

Abstract

Summary The LHC is starting operation with beam. The primary goal of CERN and the LHC community is to ensure that the collider is operated efficiently and that it achieves nominal performance in the shortest term. Since several years the community has been discussing the directions for maximizing the physics reach of the LHC by upgrading the experiments, in particular ATLAS and CMS, the LHC machine and the CERN proton injector complex, in a phased approach. The first phase of the LHC interaction region upgrade was approved by Council in December 2007. This phase relies on the mature Nb-Ti superconducting magnet technology with the target of increasing the LHC luminosity to 2 to 3 10 34 cm -2 s -1 , while maximising the use of the existing infrastructure. In this report, we present the goals and the proposed conceptual solutions for the LHC IR Upgrade Phase-I which include the recommendations of the conceptual design review.