Cargando…

Optics Studies for the CERN Proton Synchrotron Machine: Linear and Nonlinear Modelling using Beam Based Measurements

The CERN Proton Synchrotron machine is built using combined function magnets. The control of the linear tune as well as the chromaticity in both planes is achieved by means of special coils added to the main magnets, namely two pole-face-windings and one figure-of-eight loop. As a result, the overal...

Descripción completa

Detalles Bibliográficos
Autores principales: Cappi, R, Giovannozzi, Massimo, Martini, M, Métral, Elias, Métral, G, Steerenberg, R, Müller, A S
Lenguaje:eng
Publicado: 2003
Materias:
Acceso en línea:http://cds.cern.ch/record/618379
_version_ 1780900322010464256
author Cappi, R
Giovannozzi, Massimo
Martini, M
Métral, Elias
Métral, G
Steerenberg, R
Müller, A S
author_facet Cappi, R
Giovannozzi, Massimo
Martini, M
Métral, Elias
Métral, G
Steerenberg, R
Müller, A S
author_sort Cappi, R
collection CERN
description The CERN Proton Synchrotron machine is built using combined function magnets. The control of the linear tune as well as the chromaticity in both planes is achieved by means of special coils added to the main magnets, namely two pole-face-windings and one figure-of-eight loop. As a result, the overall magnetic field configuration is rather complex not to mention the saturation effects induced at top-energy. For these reasons a linear model of the PS main magnet does not provide sufficient precision to model particle dynamics. On the other hand, a sophisticated optical model is the key element for the foreseen intensity upgrade and, in particular, for the novel extraction mode based on adiabatic capture of beam particles inside stable islands in transverse phase space. A solution was found by performing accurate measurement of the nonlinear tune as a function of both amplitude and momentum offset so to extract both linear and nonlinear properties of the lattice. In this paper the measurement results are presented and the derived optical model is discussed in detail.
id cern-618379
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2003
record_format invenio
spelling cern-6183792022-08-17T13:36:47Zhttp://cds.cern.ch/record/618379engCappi, RGiovannozzi, MassimoMartini, MMétral, EliasMétral, GSteerenberg, RMüller, A SOptics Studies for the CERN Proton Synchrotron Machine: Linear and Nonlinear Modelling using Beam Based MeasurementsAccelerators and Storage RingsThe CERN Proton Synchrotron machine is built using combined function magnets. The control of the linear tune as well as the chromaticity in both planes is achieved by means of special coils added to the main magnets, namely two pole-face-windings and one figure-of-eight loop. As a result, the overall magnetic field configuration is rather complex not to mention the saturation effects induced at top-energy. For these reasons a linear model of the PS main magnet does not provide sufficient precision to model particle dynamics. On the other hand, a sophisticated optical model is the key element for the foreseen intensity upgrade and, in particular, for the novel extraction mode based on adiabatic capture of beam particles inside stable islands in transverse phase space. A solution was found by performing accurate measurement of the nonlinear tune as a function of both amplitude and momentum offset so to extract both linear and nonlinear properties of the lattice. In this paper the measurement results are presented and the derived optical model is discussed in detail.CERN-AB-2003-017-ABPoai:cds.cern.ch:6183792003-05-22
spellingShingle Accelerators and Storage Rings
Cappi, R
Giovannozzi, Massimo
Martini, M
Métral, Elias
Métral, G
Steerenberg, R
Müller, A S
Optics Studies for the CERN Proton Synchrotron Machine: Linear and Nonlinear Modelling using Beam Based Measurements
title Optics Studies for the CERN Proton Synchrotron Machine: Linear and Nonlinear Modelling using Beam Based Measurements
title_full Optics Studies for the CERN Proton Synchrotron Machine: Linear and Nonlinear Modelling using Beam Based Measurements
title_fullStr Optics Studies for the CERN Proton Synchrotron Machine: Linear and Nonlinear Modelling using Beam Based Measurements
title_full_unstemmed Optics Studies for the CERN Proton Synchrotron Machine: Linear and Nonlinear Modelling using Beam Based Measurements
title_short Optics Studies for the CERN Proton Synchrotron Machine: Linear and Nonlinear Modelling using Beam Based Measurements
title_sort optics studies for the cern proton synchrotron machine: linear and nonlinear modelling using beam based measurements
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/618379
work_keys_str_mv AT cappir opticsstudiesforthecernprotonsynchrotronmachinelinearandnonlinearmodellingusingbeambasedmeasurements
AT giovannozzimassimo opticsstudiesforthecernprotonsynchrotronmachinelinearandnonlinearmodellingusingbeambasedmeasurements
AT martinim opticsstudiesforthecernprotonsynchrotronmachinelinearandnonlinearmodellingusingbeambasedmeasurements
AT metralelias opticsstudiesforthecernprotonsynchrotronmachinelinearandnonlinearmodellingusingbeambasedmeasurements
AT metralg opticsstudiesforthecernprotonsynchrotronmachinelinearandnonlinearmodellingusingbeambasedmeasurements
AT steerenbergr opticsstudiesforthecernprotonsynchrotronmachinelinearandnonlinearmodellingusingbeambasedmeasurements
AT mulleras opticsstudiesforthecernprotonsynchrotronmachinelinearandnonlinearmodellingusingbeambasedmeasurements