A low-β stripping insertion in the CERN PS to SPS transfer line for the LHC ion programme

Author

Giovannozzi, M. ; Martini, M. ; M?¼ller, A.S.

Author_Institution

CERN, Geneva, Switzerland

Volume

2

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

1550

Abstract

In the framework of the LHC ion programme the charge state will be changed by passing through a thin metal stripping foil installed in the transfer line between the CERN PS and SPS machines. The tight transverse emittance budget of the LHC beam allows only a minor blow-up. Hence, to minimise the emittance growth due to multiple Coulomb scattering (a non-symplectic process leading also to Twiss parameter modification) the stripping foil has to be located in a low-β region. Furthermore, any change of optics has to be compliant with the simultaneous operation of the transfer line with proton and ion beams. This paper describes a possible implementation of a low-β insertion with the effect of scattering included. The impact of global constraints on the effective degrees of freedom of the matching problem has been studied in a systematic way and its outcome is reported

Keywords

beam handling equipment; colliding beam accelerators; ion accelerators; ion beams; proton accelerators; proton beams; synchrotrons; CERN PS-SPS transfer line; LHC ion programme; Twiss parameter modification; emittance growth; global constraints; ion beams; low-β stripping insertion; matching problem; multiple Coulomb scattering; proton beams; stripping foil; thin metal stripping foil; transverse emittance budget; Aluminum; Covariance matrix; Energy loss; Equations; Kinetic energy; Large Hadron Collider; Light scattering; Linear particle accelerator; Particle beams; Particle scattering;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001

Print_ISBN

0-7803-7191-7

Type

conf

DOI

10.1109/PAC.2001.986744

Filename

986744