The Practical Pomeron for High Energy Proton Collimation

Abstract

We present a model which describes proton scattering data from ISR to Tevatron energies, and which can be applied to collimation n high energy accelerators, such as the LHC and FCC. Collimators remove beam halo particles, so that they do not impinge on vulnerable regions of the machine, such as the superconducting magnets and the experimental areas. In simulating the effect of the collimator jaws it is crucial to model the scattering of protons at small momentum transfer~$t$,as these protons can subsequently survive several turns of the ring before being lost. At high energies these soft processes are well described by Pomeron exchange models. We study the behaviour of elastic and single-diffractive dissociation cross sections over a wide range of energy, and show that the model can be used as a global description of the wide variety of high energy elastic and diffractive data presently available. In particular it models low mass diffraction dissociation, where a rich resonance structure is present, and thus predicts the differential and integrated cross sections in the kinematical range appropriate to the LHC.We incorporate the physics of this model into the beam tracking code MERLIN and use it to simulate the resulting loss maps of the beam halo lost in the collimators in the LHC.

23 pages, 25 figures

References in corpus (8)

• Evidence for non-exponential elastic proton-proton differential cross-section at low |t| and sqrt(s) = 8 TeV by TOTEM
• Simulations and measurements of beam loss patterns at the CERN Large Hadron Collider
• A QCD motivated model for soft interactions at high energies
• Tevatron Electron Lenses: Design and Operation
• Soft diffraction at the LHC: a partonic interpretation
• Diffractive dissociation re-visited for predictions at the LHC
• Testing Beam-Induced Quench Levels of LHC Superconducting Magnets
• The possibility that the triple-Pomeron coupling vanishes at q_t=0

Cited by in corpus (8)

• Dark Sector Production via Proton Bremsstrahlung
• LHC Searches for Dark Matter in Compressed Mass Scenarios: Challenges in the Forward Proton Mode
• Models of Total, Elastic and Diffractive Cross Sections
• Dipole evolution: perspectives for collectivity and ${\gamma }^{\ast }$A collisions
• Collimation method studies for next-generation hadron colliders
• Performance of the Large Hadron Collider cleaning system during the squeeze: simulations and measurements
• Average Event Properties from LHC to FCC-hh
• Performance of Monte Carlo event generators of pp collisions at NICA energies