Title :
Analysis and measurement of coupling effects in the transfer line from PS to SPS for the LHC proton beam
Author :
Arduini, G. ; Chao, Y. ; Giovannozzi, M. ; Klem, J. ; Manglunki, D. ; Martini, M.
Author_Institution :
CERN, Geneva, Switzerland
Abstract :
The tight emittance budget for injection into the LHC demands an accurate matching of the transfer line from the PS to the SPS to minimise the injection blow-up. Precise two-dimensional beam profile measurements with optical transition radiation (OTR) screens have recently pointed towards the presence of coupling in the LHC beam transfer. The new algorithms developed to analyse the profile data from the OTR screens and to quantify the observed coupling (in particular the determination of the complete 5×5 beam covariance matrix) are discussed. The results of the measurements and their dependence on the extraction conditions in the PS (trajectory and momentum) are presented and discussed in detail
Keywords :
colliding beam accelerators; covariance matrices; particle beam diagnostics; particle beam extraction; particle beam injection; proton accelerators; proton beams; synchrotrons; LHC proton beam; Large Hadron Collider; beam profile measurements; blow-up; coupling effects measurement; covariance matrix; extraction conditions; injection; optical transition radiation screens; proton synchrotrons; super proton synchrotrons; tight emittance budget; transfer line; Covariance matrix; Dispersion; Large Hadron Collider; Optical coupling; Optical devices; Optical sensors; Particle beams; Performance evaluation; Protons; Signal processing;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.988032
