Simultaneous correction of high order geometrical driving terms with octupoles in synchrotron light sources

As the next generation of light sources is pushing toward high-brightness storage rings with ultralow emittance, the control of the beam nonlinear dynamics becomes increasingly challenging. Nonlinear perturbations, arising from sextupole cross talks, set the limit to the achievable dynamic performan...

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Autores principales:	Fabien Plassard, Guimei Wang, Timur Shaftan, Victor Smaluk, Yongjun Li, Yoshiteru Hidaka
Formato:	article
Lenguaje:	EN
Publicado:	American Physical Society 2021
Materias:	Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Acceso en línea:	https://doaj.org/article/808be3e37b254ddaa291ed06d678d9c3
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spelling	oai:doaj.org-article:808be3e37b254ddaa291ed06d678d9c32021-11-24T15:09:12ZSimultaneous correction of high order geometrical driving terms with octupoles in synchrotron light sources10.1103/PhysRevAccelBeams.24.1148012469-9888https://doaj.org/article/808be3e37b254ddaa291ed06d678d9c32021-11-01T00:00:00Zhttp://doi.org/10.1103/PhysRevAccelBeams.24.114801http://doi.org/10.1103/PhysRevAccelBeams.24.114801https://doaj.org/toc/2469-9888As the next generation of light sources is pushing toward high-brightness storage rings with ultralow emittance, the control of the beam nonlinear dynamics becomes increasingly challenging. Nonlinear perturbations, arising from sextupole cross talks, set the limit to the achievable dynamic performance of the machine. Octupoles can be an efficient mean to tackle the remaining resonant driving terms generated to the second order by the lattice sextupoles. However, they have been used sparingly in light sources because of a lack of control on higher order effects. In this paper, we discuss the optimal positioning of octupoles, with respect to the sextupoles present in the lattice, for a local and simultaneous compensation of all fourth order on-momentum phase and amplitude dependent driving terms, using only three families of octupoles. In addition, higher order geometrical terms are also minimized, including among others, second-order tune shift with amplitude. This study is a continuation of past research made on the optimal use of octupoles for the operation of future light sources. The correction method was built on observations made on a simple model, then applied to a realistic low-emittance lattice, designed in the framework of the upgrade of the National Synchrotron Light Source II, to demonstrate its potential.Fabien PlassardGuimei WangTimur ShaftanVictor SmalukYongjun LiYoshiteru HidakaAmerican Physical SocietyarticleNuclear and particle physics. Atomic energy. RadioactivityQC770-798ENPhysical Review Accelerators and Beams, Vol 24, Iss 11, p 114801 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
spellingShingle	Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 Fabien Plassard Guimei Wang Timur Shaftan Victor Smaluk Yongjun Li Yoshiteru Hidaka Simultaneous correction of high order geometrical driving terms with octupoles in synchrotron light sources
description	As the next generation of light sources is pushing toward high-brightness storage rings with ultralow emittance, the control of the beam nonlinear dynamics becomes increasingly challenging. Nonlinear perturbations, arising from sextupole cross talks, set the limit to the achievable dynamic performance of the machine. Octupoles can be an efficient mean to tackle the remaining resonant driving terms generated to the second order by the lattice sextupoles. However, they have been used sparingly in light sources because of a lack of control on higher order effects. In this paper, we discuss the optimal positioning of octupoles, with respect to the sextupoles present in the lattice, for a local and simultaneous compensation of all fourth order on-momentum phase and amplitude dependent driving terms, using only three families of octupoles. In addition, higher order geometrical terms are also minimized, including among others, second-order tune shift with amplitude. This study is a continuation of past research made on the optimal use of octupoles for the operation of future light sources. The correction method was built on observations made on a simple model, then applied to a realistic low-emittance lattice, designed in the framework of the upgrade of the National Synchrotron Light Source II, to demonstrate its potential.
format	article
author	Fabien Plassard Guimei Wang Timur Shaftan Victor Smaluk Yongjun Li Yoshiteru Hidaka
author_facet	Fabien Plassard Guimei Wang Timur Shaftan Victor Smaluk Yongjun Li Yoshiteru Hidaka
author_sort	Fabien Plassard
title	Simultaneous correction of high order geometrical driving terms with octupoles in synchrotron light sources
title_short	Simultaneous correction of high order geometrical driving terms with octupoles in synchrotron light sources
title_full	Simultaneous correction of high order geometrical driving terms with octupoles in synchrotron light sources
title_fullStr	Simultaneous correction of high order geometrical driving terms with octupoles in synchrotron light sources
title_full_unstemmed	Simultaneous correction of high order geometrical driving terms with octupoles in synchrotron light sources
title_sort	simultaneous correction of high order geometrical driving terms with octupoles in synchrotron light sources
publisher	American Physical Society
publishDate	2021
url	https://doaj.org/article/808be3e37b254ddaa291ed06d678d9c3
work_keys_str_mv	AT fabienplassard simultaneouscorrectionofhighordergeometricaldrivingtermswithoctupolesinsynchrotronlightsources AT guimeiwang simultaneouscorrectionofhighordergeometricaldrivingtermswithoctupolesinsynchrotronlightsources AT timurshaftan simultaneouscorrectionofhighordergeometricaldrivingtermswithoctupolesinsynchrotronlightsources AT victorsmaluk simultaneouscorrectionofhighordergeometricaldrivingtermswithoctupolesinsynchrotronlightsources AT yongjunli simultaneouscorrectionofhighordergeometricaldrivingtermswithoctupolesinsynchrotronlightsources AT yoshiteruhidaka simultaneouscorrectionofhighordergeometricaldrivingtermswithoctupolesinsynchrotronlightsources
_version_	1718414937883148288

Simultaneous correction of high order geometrical driving terms with octupoles in synchrotron light sources

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