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Developing a Resonance Correction Scheme in the LHC

Non-linear errors in the magnetic field of the Large Hadron Collider (LHC) at CERN often lead to undesirable resonances and instabilities in the particle motion, which can negatively affect the operations of the accelerator. This project focuses on developing a new correction scheme with a response matrix approach to optimize the values of the skew sextupolar correctors of the LHC at injection, in order to mitigate the impact of resonance driving terms (RDTs). So far, no correction has been introduced to actively compensate these RDTs. In particular, we investigate the RDTs related to the 3Qy resonance, which has been proposed to be connected to emittance growth in the LHC, leading to a loss of luminosity in the detectors. Starting from a basic linear model of the LHC, we gradually introduce more complex errors and demonstrate that this correction scheme is more effective than the standard correction. The correction scheme also proves to be effective for more advanced non-linear models, also considering alignment errors.

Identiferoai:union.ndltd.org:UPSALLA1/oai:DiVA.org:uu-451963
Date January 2021
CreatorsWaagaard, Elias
PublisherUppsala universitet, FREIA
Source SetsDiVA Archive at Upsalla University
LanguageEnglish
Detected LanguageEnglish
TypeStudent thesis, info:eu-repo/semantics/bachelorThesis, text
Formatapplication/pdf
Rightsinfo:eu-repo/semantics/openAccess
RelationFYSAST ; FYSPROJ1232, Freia report ; 2021/01

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