Modeling of the emittance growth due to decoherence in collision at the Large Hadron Collider

The transverse emittance growth rate of colliding hadron beams driven by external sources of noise is investigated based on existing analytical model as well as on macro-particle simulations and comparison to experimental data at the Large Hadron Collider (LHC). It is shown that an analytical descri...

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Main Authors: X. Buffat, W. Herr, T. Pieloni, D. Valuch
Format: Article
Language:English
Published: American Physical Society 2020-02-01
Series:Physical Review Accelerators and Beams
Online Access:http://doi.org/10.1103/PhysRevAccelBeams.23.021002
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spelling doaj-db609c84a4c348998beeb3762cc824e92020-11-25T00:36:19ZengAmerican Physical SocietyPhysical Review Accelerators and Beams2469-98882020-02-0123202100210.1103/PhysRevAccelBeams.23.021002Modeling of the emittance growth due to decoherence in collision at the Large Hadron ColliderX. BuffatW. HerrT. PieloniD. ValuchThe transverse emittance growth rate of colliding hadron beams driven by external sources of noise is investigated based on existing analytical model as well as on macro-particle simulations and comparison to experimental data at the Large Hadron Collider (LHC). It is shown that an analytical description of the emittance growth rate neglecting the existence coherent beam-beam mode can nevertheless provide accurate estimate for operational conditions, featuring notably a high chromaticity. The model is used to investigate the level of noise experienced by the LHC beams. The results indicate that a significant reduction of the noise floor of the transverse feedback’s beam position monitor is required for operation with a large beam-beam tune shift, as the one anticipated for the High Luminosity LHC (HL-LHC).http://doi.org/10.1103/PhysRevAccelBeams.23.021002
collection DOAJ
language English
format Article
sources DOAJ
author X. Buffat
W. Herr
T. Pieloni
D. Valuch
spellingShingle X. Buffat
W. Herr
T. Pieloni
D. Valuch
Modeling of the emittance growth due to decoherence in collision at the Large Hadron Collider
Physical Review Accelerators and Beams
author_facet X. Buffat
W. Herr
T. Pieloni
D. Valuch
author_sort X. Buffat
title Modeling of the emittance growth due to decoherence in collision at the Large Hadron Collider
title_short Modeling of the emittance growth due to decoherence in collision at the Large Hadron Collider
title_full Modeling of the emittance growth due to decoherence in collision at the Large Hadron Collider
title_fullStr Modeling of the emittance growth due to decoherence in collision at the Large Hadron Collider
title_full_unstemmed Modeling of the emittance growth due to decoherence in collision at the Large Hadron Collider
title_sort modeling of the emittance growth due to decoherence in collision at the large hadron collider
publisher American Physical Society
series Physical Review Accelerators and Beams
issn 2469-9888
publishDate 2020-02-01
description The transverse emittance growth rate of colliding hadron beams driven by external sources of noise is investigated based on existing analytical model as well as on macro-particle simulations and comparison to experimental data at the Large Hadron Collider (LHC). It is shown that an analytical description of the emittance growth rate neglecting the existence coherent beam-beam mode can nevertheless provide accurate estimate for operational conditions, featuring notably a high chromaticity. The model is used to investigate the level of noise experienced by the LHC beams. The results indicate that a significant reduction of the noise floor of the transverse feedback’s beam position monitor is required for operation with a large beam-beam tune shift, as the one anticipated for the High Luminosity LHC (HL-LHC).
url http://doi.org/10.1103/PhysRevAccelBeams.23.021002
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