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Mode Coupling Theory in Collisions With a Large Crossing Angle

We discuss a novel coherent beam-beam instability in collisions with a large crossing angle. The instability appears in the correlated head-tail motion of the two colliding beams. Cross wake force is introduced to represent the head-tail correlation between colliding beams. The cross wake force is l...

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Autores principales: Kuroo, Nami, Hirosawa, Kouki, Ohmi, Kazuhito, Oide, Katsunobu, Zhou, Demin, Zimmermann, Frank
Lenguaje:eng
Publicado: 2018
Materias:
Acceso en línea:https://dx.doi.org/10.18429/JACoW-IPAC2018-THPAF089
http://cds.cern.ch/record/2652550
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author Kuroo, Nami
Hirosawa, Kouki
Ohmi, Kazuhito
Oide, Katsunobu
Zhou, Demin
Zimmermann, Frank
author_facet Kuroo, Nami
Hirosawa, Kouki
Ohmi, Kazuhito
Oide, Katsunobu
Zhou, Demin
Zimmermann, Frank
author_sort Kuroo, Nami
collection CERN
description We discuss a novel coherent beam-beam instability in collisions with a large crossing angle. The instability appears in the correlated head-tail motion of the two colliding beams. Cross wake force is introduced to represent the head-tail correlation between colliding beams. The cross wake force is localized at the collision point. Mode coupling theory based on the cross wake force is developed. Collision scheme with a large crossing angle is being very popular in design of electron positron collider. In SuperKEKB project, a collision with a large crossing angle is performed to boost the luminosity ~ 10³⁶ cm⁻²s^{−1}. Future circular collider, FCC is also designed with a large crossing angle. Strong-strong simulations have shown a strong coherent head-tail instability, which can limit the performance of proposed future colliders. The mode coupling theory using the cross wake force explains the instability. The instability may affect all colliders designs based on the crab waist scheme.
id oai-inspirehep.net-1690284
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2018
record_format invenio
spelling oai-inspirehep.net-16902842019-09-30T06:29:59Zdoi:10.18429/JACoW-IPAC2018-THPAF089http://cds.cern.ch/record/2652550engKuroo, NamiHirosawa, KoukiOhmi, KazuhitoOide, KatsunobuZhou, DeminZimmermann, FrankMode Coupling Theory in Collisions With a Large Crossing AngleAccelerators and Storage RingsWe discuss a novel coherent beam-beam instability in collisions with a large crossing angle. The instability appears in the correlated head-tail motion of the two colliding beams. Cross wake force is introduced to represent the head-tail correlation between colliding beams. The cross wake force is localized at the collision point. Mode coupling theory based on the cross wake force is developed. Collision scheme with a large crossing angle is being very popular in design of electron positron collider. In SuperKEKB project, a collision with a large crossing angle is performed to boost the luminosity ~ 10³⁶ cm⁻²s^{−1}. Future circular collider, FCC is also designed with a large crossing angle. Strong-strong simulations have shown a strong coherent head-tail instability, which can limit the performance of proposed future colliders. The mode coupling theory using the cross wake force explains the instability. The instability may affect all colliders designs based on the crab waist scheme.CERN-ACC-2018-097oai:inspirehep.net:16902842018
spellingShingle Accelerators and Storage Rings
Kuroo, Nami
Hirosawa, Kouki
Ohmi, Kazuhito
Oide, Katsunobu
Zhou, Demin
Zimmermann, Frank
Mode Coupling Theory in Collisions With a Large Crossing Angle
title Mode Coupling Theory in Collisions With a Large Crossing Angle
title_full Mode Coupling Theory in Collisions With a Large Crossing Angle
title_fullStr Mode Coupling Theory in Collisions With a Large Crossing Angle
title_full_unstemmed Mode Coupling Theory in Collisions With a Large Crossing Angle
title_short Mode Coupling Theory in Collisions With a Large Crossing Angle
title_sort mode coupling theory in collisions with a large crossing angle
topic Accelerators and Storage Rings
url https://dx.doi.org/10.18429/JACoW-IPAC2018-THPAF089
http://cds.cern.ch/record/2652550
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AT oidekatsunobu modecouplingtheoryincollisionswithalargecrossingangle
AT zhoudemin modecouplingtheoryincollisionswithalargecrossingangle
AT zimmermannfrank modecouplingtheoryincollisionswithalargecrossingangle