EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH European Laboratory for Particle Physics SUMMARY OF THE SINGLE-BEAM COLLECTIVE EFFECTS IN THE LHC

EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH European Laboratory for Particle Physics THE ELECTRON CLOUD INSTABILITY OF THE LHC BEAM IN THE CERN SPS

The electron cloud induced by the LHC beam in the SPS occurs mainly in the dipoles and it is responsible for strong transverse instabilities. In the horizontal plane a coupled bunch mode instability develops in a few tens of turns at injection. Tune shift measurements, mode number and phase space analyses have been performed at different energies and provide information about the electron cloud...

EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH Laboratory for Particle Physics (ECR) STUDIES ON COOLING OF THE TOTEM PARTICLE DETECTOR AT THE LHC

EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH European Laboratory for Particle Physics THE LARGE HADRON COLLIDER, A MEGASCIENCE PROJECT

The Large Hadron Collider (LHC) will be the next particle accelerator built to serve the world's high-energy physics community at CERN, the European Organisation for Nuclear Research. Reusing the 26.7-km circumference tunnel and infrastructure of the existing LEP collider, the LHC will make use of advanced technology high-field superconducting magnets operated in superfluid helium to push the e...

EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH European Laboratory for Particle Physics Large Hadron Collider Project LHC Project Report 16 Transverse Instabilities in the LHC

I first summarize the impedance model that I will be using (this is compiled from the work of several other authors). I then use the methods described elsewhere [1] to determine mode coupling thresholds and growth rates of multibunch modes, including the effects of multibunch mode coupling (see [1]). The effects of feedback are also considered.

EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH European Laboratory for Particle Physics PROTECTION DEVICES IN THE TRANSFER LINES TO THE LHC

Beams will be transferred from SPS to LHC through two transfer lines, each of over 2.5 km length, equipped with conventional resistive magnets with relatively small apertures. Beam energy densities will be roughly 4 orders of magnitude above the LHC quench limit and about one order above damage level. Possible failures of the various elements in the transfer lines and the SPS machine are discus...