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Beam focusing limitation from synchrotron radiation in two dimensions

The Oide effect considers the synchrotron radiation in the final focusing quadrupole, and it sets a lower limit on the vertical beam size at the interaction point, particularly relevant for high-energy linear colliders. The theory of the Oide effect was derived considering only the second moment of...

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Detalles Bibliográficos
Autores principales: Blanco, O R, Tomás, R, Bambade, P
Lenguaje:eng
Publicado: 2016
Materias:
Acceso en línea:https://dx.doi.org/10.1103/PhysRevAccelBeams.19.021002
http://cds.cern.ch/record/2262878
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author Blanco, O R
Tomás, R
Bambade, P
author_facet Blanco, O R
Tomás, R
Bambade, P
author_sort Blanco, O R
collection CERN
description The Oide effect considers the synchrotron radiation in the final focusing quadrupole, and it sets a lower limit on the vertical beam size at the interaction point, particularly relevant for high-energy linear colliders. The theory of the Oide effect was derived considering only the second moment of the radiation in the focusing plane of the magnet. This article addresses the theoretical calculation of the radiation effect on the beam size considering the first and second moments of the radiation and both focusing and defocusing planes of the quadrupole. The effect for a Gaussian beam is referred to as 2D-Oide; however, an alternative beam size figure is given that could represent better the effect on the minimum achievable βy*. The CLIC 3 TeV final quadrupole (QD0) and beam parameters are used to compare the theoretical results from the Oide effect and the 2D-Oide effect with particle tracking in placet. The 2D-Oide effect is demonstrated to be important, as it increases by 17% the contribution to the beam size. Further insight into the aberrations induced by the synchrotron radiation opens the possibility to partially correct the 2D-Oide effect with octupole magnets. A beam size reduction of 4% is achieved in the simplest configuration, using a single octupole.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2016
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spelling oai-inspirehep.net-14556932021-05-03T07:48:08Zdoi:10.1103/PhysRevAccelBeams.19.021002http://cds.cern.ch/record/2262878engBlanco, O RTomás, RBambade, PBeam focusing limitation from synchrotron radiation in two dimensionsAccelerators and Storage RingsThe Oide effect considers the synchrotron radiation in the final focusing quadrupole, and it sets a lower limit on the vertical beam size at the interaction point, particularly relevant for high-energy linear colliders. The theory of the Oide effect was derived considering only the second moment of the radiation in the focusing plane of the magnet. This article addresses the theoretical calculation of the radiation effect on the beam size considering the first and second moments of the radiation and both focusing and defocusing planes of the quadrupole. The effect for a Gaussian beam is referred to as 2D-Oide; however, an alternative beam size figure is given that could represent better the effect on the minimum achievable βy*. The CLIC 3 TeV final quadrupole (QD0) and beam parameters are used to compare the theoretical results from the Oide effect and the 2D-Oide effect with particle tracking in placet. The 2D-Oide effect is demonstrated to be important, as it increases by 17% the contribution to the beam size. Further insight into the aberrations induced by the synchrotron radiation opens the possibility to partially correct the 2D-Oide effect with octupole magnets. A beam size reduction of 4% is achieved in the simplest configuration, using a single octupole.oai:inspirehep.net:14556932016
spellingShingle Accelerators and Storage Rings
Blanco, O R
Tomás, R
Bambade, P
Beam focusing limitation from synchrotron radiation in two dimensions
title Beam focusing limitation from synchrotron radiation in two dimensions
title_full Beam focusing limitation from synchrotron radiation in two dimensions
title_fullStr Beam focusing limitation from synchrotron radiation in two dimensions
title_full_unstemmed Beam focusing limitation from synchrotron radiation in two dimensions
title_short Beam focusing limitation from synchrotron radiation in two dimensions
title_sort beam focusing limitation from synchrotron radiation in two dimensions
topic Accelerators and Storage Rings
url https://dx.doi.org/10.1103/PhysRevAccelBeams.19.021002
http://cds.cern.ch/record/2262878
work_keys_str_mv AT blancoor beamfocusinglimitationfromsynchrotronradiationintwodimensions
AT tomasr beamfocusinglimitationfromsynchrotronradiationintwodimensions
AT bambadep beamfocusinglimitationfromsynchrotronradiationintwodimensions