The CERN PS complex as part of the LHC injector chain

R Cappi,E.J.N Wilson,S Hancock,M Martini,H Schonauer,R Garoby,K Schindl,N Rasmussen,J.P Riunaud,T Risselada

doi:10.1109/pac.1991.164237

Abstract

The delivery of a beam with characteristics appropriate to the filling of the LHC (Large Hadron Collider) proton-proton collider requires that the CERN PS complex provide a beam whose transverse particle density exceeds, by a factor of three, the highest currently attained. The beam dynamics operations and the associated hardware modifications which would be required to achieve this goal are considered. The approach favored involves filling the Proton Synchrotron (PS) with two pulses from the Proton Synchrotron Booster (PSB) and requires and RF quadrupole (RFQ2) as a preinjector for the linac (LINAC2), an increase of the PSB extraction energy and additional RF systems, both in the PSB and PS. >

Highlights

Maximizing the luminosity requires the smallest cross sectional area of the two interacting beams, the highest intensity per bunch and the largest number of bunches with the shortest inter·bunch spacing
This paper considers the beam dynamics operations and the associ ated hardware modihcations which would be required to achieve this goal
Its selection is governed by the need for the shortest possible LHC filling time, espe cially in order to reduce the effects of persistent currents in the superconducting magnets of LHC at injection

Summary

Introduction

Maximizing the luminosity requires the smallest cross sectional area of the two interacting beams, the highest intensity per bunch and the largest number of bunches with the shortest inter·bunch spacing.

LHC filling scheme

Hardware modifications

Findings

Conclusions