MD3308 – Growth rate versus chromaticity measurement at injection

This report summarises the results of MD3308 on the measurement of the instability rise time as a function of chromaticity in the LHC. The measurement was held in the MD block 3 of 2018, on the afternoon of the 14th of September. With nominal bunches at the injection energy, the horizontal and verti...

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Autores principales: Amorim, David, Antipov, Sergey, Buffat, Xavier, Carideo, Emanuela, Dascalu, Titus-Stefan, Metral, Elias, Mounet, Nicolas, Oeftiger, Adrian, Salvant, Benoit, Valuch, Daniel
Lenguaje:eng
Publicado: 2020
Materias:
Accelerators and Storage Rings
Acceso en línea:http://cds.cern.ch/record/2720706
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author Amorim, David
Antipov, Sergey
Buffat, Xavier
Carideo, Emanuela
Dascalu, Titus-Stefan
Metral, Elias
Mounet, Nicolas
Oeftiger, Adrian
Salvant, Benoit
Valuch, Daniel
author_facet Amorim, David
Antipov, Sergey
Buffat, Xavier
Carideo, Emanuela
Dascalu, Titus-Stefan
Metral, Elias
Mounet, Nicolas
Oeftiger, Adrian
Salvant, Benoit
Valuch, Daniel
author_sort Amorim, David
collection CERN
description This report summarises the results of MD3308 on the measurement of the instability rise time as a function of chromaticity in the LHC. The measurement was held in the MD block 3 of 2018, on the afternoon of the 14th of September. With nominal bunches at the injection energy, the horizontal and vertical chromaticities were trimmed in the negative range from ∼-40 to -2 units. The transverse damper (ADT) was switched off to let an instability develop. The turn-by-turn position signal was then recorded with the ADT ObsBox. From these signals, the rise-time was deduced and compared to a prediction derived from the LHC impedance model.
id cern-2720706
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2020
record_format invenio
spelling cern-27207062020-08-10T15:43:03Zhttp://cds.cern.ch/record/2720706engAmorim, DavidAntipov, SergeyBuffat, XavierCarideo, EmanuelaDascalu, Titus-StefanMetral, EliasMounet, NicolasOeftiger, AdrianSalvant, BenoitValuch, DanielMD3308 – Growth rate versus chromaticity measurement at injectionAccelerators and Storage RingsThis report summarises the results of MD3308 on the measurement of the instability rise time as a function of chromaticity in the LHC. The measurement was held in the MD block 3 of 2018, on the afternoon of the 14th of September. With nominal bunches at the injection energy, the horizontal and vertical chromaticities were trimmed in the negative range from ∼-40 to -2 units. The transverse damper (ADT) was switched off to let an instability develop. The turn-by-turn position signal was then recorded with the ADT ObsBox. From these signals, the rise-time was deduced and compared to a prediction derived from the LHC impedance model.CERN-ACC-NOTE-2020-0034oai:cds.cern.ch:27207062020-05-29
spellingShingle Accelerators and Storage Rings
Amorim, David
Antipov, Sergey
Buffat, Xavier
Carideo, Emanuela
Dascalu, Titus-Stefan
Metral, Elias
Mounet, Nicolas
Oeftiger, Adrian
Salvant, Benoit
Valuch, Daniel
MD3308 – Growth rate versus chromaticity measurement at injection
title MD3308 – Growth rate versus chromaticity measurement at injection
title_full MD3308 – Growth rate versus chromaticity measurement at injection
title_fullStr MD3308 – Growth rate versus chromaticity measurement at injection
title_full_unstemmed MD3308 – Growth rate versus chromaticity measurement at injection
title_short MD3308 – Growth rate versus chromaticity measurement at injection
title_sort md3308 – growth rate versus chromaticity measurement at injection
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/2720706
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