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MD1271: Effect of low frequency noise on the evolution of the emittance and halo population
For the High Luminosity upgrade the β* in IR1 and IR5 will be further reduced compared to the current LHC. As the β* decreases the β-functions in the inner triplet (IT) increase resulting in a higher sensitivity of the HL-LHC to ground motion in the IT region or to increases of the low frequency noi...
| Autores principales: | , , , , , , , , , , , , , , |
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| Lenguaje: | eng |
| Publicado: |
2018
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| Materias: | |
| Acceso en línea: | http://cds.cern.ch/record/2304735 |
| _version_ | 1780957485156270080 |
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| author | Fitterer, Miriam Stancari, Giulio Valishev, Alexander Bruce, Roderik Hofle, Wolfgang Hostettler, Michi Papadopoulou, Parthena Stefania Papotti, Giulia Papaphilippou, Yannis Pellegrini, Dario Trad, Georges Valuch, Daniel Valentino, Gianluca Wagner, Joschka Cai, Xu |
| author_facet | Fitterer, Miriam Stancari, Giulio Valishev, Alexander Bruce, Roderik Hofle, Wolfgang Hostettler, Michi Papadopoulou, Parthena Stefania Papotti, Giulia Papaphilippou, Yannis Pellegrini, Dario Trad, Georges Valuch, Daniel Valentino, Gianluca Wagner, Joschka Cai, Xu |
| author_sort | Fitterer, Miriam |
| collection | CERN |
| description | For the High Luminosity upgrade the β* in IR1 and IR5 will be further reduced compared to the current LHC. As the β* decreases the β-functions in the inner triplet (IT) increase resulting in a higher sensitivity of the HL-LHC to ground motion in the IT region or to increases of the low frequency noise. Noise can in general lead to emittance growth and higher halo population and diffusion rate. However, it is usually assumed in the literature that only frequencies close to the betatron frequencies and sidebands have an effect on the emittance and tail population. To test this theory, an MD was carried out to observe if also low frequency noise can lead to emittance growth and stronger halo population and diffusion. This MD conducted on 24.08.2016 follows a previous MD on 05.11.2015/06.11.2015 |
| id | cern-2304735 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2018 |
| record_format | invenio |
| spelling | cern-23047352019-09-30T06:29:59Zhttp://cds.cern.ch/record/2304735engFitterer, MiriamStancari, GiulioValishev, AlexanderBruce, RoderikHofle, WolfgangHostettler, MichiPapadopoulou, Parthena StefaniaPapotti, GiuliaPapaphilippou, YannisPellegrini, DarioTrad, GeorgesValuch, DanielValentino, GianlucaWagner, JoschkaCai, XuMD1271: Effect of low frequency noise on the evolution of the emittance and halo populationAccelerators and Storage RingsFor the High Luminosity upgrade the β* in IR1 and IR5 will be further reduced compared to the current LHC. As the β* decreases the β-functions in the inner triplet (IT) increase resulting in a higher sensitivity of the HL-LHC to ground motion in the IT region or to increases of the low frequency noise. Noise can in general lead to emittance growth and higher halo population and diffusion rate. However, it is usually assumed in the literature that only frequencies close to the betatron frequencies and sidebands have an effect on the emittance and tail population. To test this theory, an MD was carried out to observe if also low frequency noise can lead to emittance growth and stronger halo population and diffusion. This MD conducted on 24.08.2016 follows a previous MD on 05.11.2015/06.11.2015 CERN-ACC-NOTE-2018-0006oai:cds.cern.ch:23047352018-02-08 |
| spellingShingle | Accelerators and Storage Rings Fitterer, Miriam Stancari, Giulio Valishev, Alexander Bruce, Roderik Hofle, Wolfgang Hostettler, Michi Papadopoulou, Parthena Stefania Papotti, Giulia Papaphilippou, Yannis Pellegrini, Dario Trad, Georges Valuch, Daniel Valentino, Gianluca Wagner, Joschka Cai, Xu MD1271: Effect of low frequency noise on the evolution of the emittance and halo population |
| title | MD1271: Effect of low frequency noise on the evolution of the emittance and halo population |
| title_full | MD1271: Effect of low frequency noise on the evolution of the emittance and halo population |
| title_fullStr | MD1271: Effect of low frequency noise on the evolution of the emittance and halo population |
| title_full_unstemmed | MD1271: Effect of low frequency noise on the evolution of the emittance and halo population |
| title_short | MD1271: Effect of low frequency noise on the evolution of the emittance and halo population |
| title_sort | md1271: effect of low frequency noise on the evolution of the emittance and halo population |
| topic | Accelerators and Storage Rings |
| url | http://cds.cern.ch/record/2304735 |
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