Plasma-Wakefield Accelerator Group

Abstract:

A spin-parity 1+ρ{variant}π enhancement is observed for the 3π mass spectrum in the reaction K-p → Σ-π+π+π- where events with a small (K- → Σ-) momentum transfer are selected. The mass (1040 MeV) and width (230 MeV) of this enhancement are reminiscent of the A1 → ρ{variant}π bump which has mainly been observed in the diffractive-like processes. The cross section for this enhancement at 4.15 GeV/c incident K- momentum is (3.6 ± 0.5) μb. © 1977.

Abstract:

π - ω interference is studied in the reactions K^- p → π⁺ π^- (Λ⁰, ε{lunate}) at 4.2 GeV/c using data from a high statistics experiments in the CERN 2m HBC. The phenomenon is analysed in terms of the conventional formalism as well as in terms of a new model for π - ω interference proposed by Earles and Srivastava. Satisfactory agreement with the data is found for both models. The rate of ω → 2π obtained in the latter model is in agreement with the VMD (Vector Meson Dominance) prediction for ω → γ → ρ{variant} → 2π. © 1977.

Abstract:

A new Beam Delivery System (BDS) has been developed to explore the feasibility of extending the energy reach of CLIC to 7 TeV, either through an extension of existing CLIC linacs or by integrating novel acceleration technologies. This study provides key insights for the design of future multiTeV collider concepts, including a potential 10 TeV plasma wakefield acceleration-based collider. Particular emphasis is placed on developing a more compact Final Focus System (FFS) capable of achieving a luminosity higher than that of previous designs. An in-depth analysis of higher-order optical aberrations and their impact on beam size and luminosity performance is presented.