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LHC 3324: Counteracting coupling decay at injection,
The b3 spool-pieces are corrector sextupole magnets (MCS), are designed to correct the b3-error of the main dipoles. Changes in the settings of the MCS have been linked to changes in transverse coupling. This implies that there is a nonzero vertical orbit in the MCS which is feeding down to coupling...
| Autores principales: | , , , , , , |
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| Lenguaje: | eng |
| Publicado: |
2021
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| Materias: | |
| Acceso en línea: | http://cds.cern.ch/record/2753934 |
| _version_ | 1780969375137792000 |
|---|---|
| author | Persson, Tobias Hakan Bjorn Maclean, Ewen Hamish Hulpers, Fredrik Solfaroli Camillocci, Matteo Hofer, Michael Tomas Garcia, Rogelio Garcia-Tabares Valdivieso, Ana |
| author_facet | Persson, Tobias Hakan Bjorn Maclean, Ewen Hamish Hulpers, Fredrik Solfaroli Camillocci, Matteo Hofer, Michael Tomas Garcia, Rogelio Garcia-Tabares Valdivieso, Ana |
| author_sort | Persson, Tobias Hakan Bjorn |
| collection | CERN |
| description | The b3 spool-pieces are corrector sextupole magnets (MCS), are designed to correct the b3-error of the main dipoles. Changes in the settings of the MCS have been linked to changes in transverse coupling. This implies that there is a nonzero vertical orbit in the MCS which is feeding down to coupling. In this report we investigate if this is likely to be an effect of a non-centered orbit or if the MCS are misaligned with respect to the main dipole. The results indicate that the misalignments of the MCS are the dominant cause. A method to change the powering of the MCS in order to compensate for the chomaticity decay but without changing the global coupling is also tested and reported. |
| id | cern-2753934 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2021 |
| record_format | invenio |
| spelling | cern-27539342021-08-06T19:45:27Zhttp://cds.cern.ch/record/2753934engPersson, Tobias Hakan BjornMaclean, Ewen HamishHulpers, FredrikSolfaroli Camillocci, MatteoHofer, MichaelTomas Garcia, RogelioGarcia-Tabares Valdivieso, AnaLHC 3324: Counteracting coupling decay at injection, Accelerators and Storage RingsThe b3 spool-pieces are corrector sextupole magnets (MCS), are designed to correct the b3-error of the main dipoles. Changes in the settings of the MCS have been linked to changes in transverse coupling. This implies that there is a nonzero vertical orbit in the MCS which is feeding down to coupling. In this report we investigate if this is likely to be an effect of a non-centered orbit or if the MCS are misaligned with respect to the main dipole. The results indicate that the misalignments of the MCS are the dominant cause. A method to change the powering of the MCS in order to compensate for the chomaticity decay but without changing the global coupling is also tested and reported.CERN-ACC-NOTE-2021-0008oai:cds.cern.ch:27539342021-02-22 |
| spellingShingle | Accelerators and Storage Rings Persson, Tobias Hakan Bjorn Maclean, Ewen Hamish Hulpers, Fredrik Solfaroli Camillocci, Matteo Hofer, Michael Tomas Garcia, Rogelio Garcia-Tabares Valdivieso, Ana LHC 3324: Counteracting coupling decay at injection, |
| title | LHC 3324: Counteracting coupling decay at injection, |
| title_full | LHC 3324: Counteracting coupling decay at injection, |
| title_fullStr | LHC 3324: Counteracting coupling decay at injection, |
| title_full_unstemmed | LHC 3324: Counteracting coupling decay at injection, |
| title_short | LHC 3324: Counteracting coupling decay at injection, |
| title_sort | lhc 3324: counteracting coupling decay at injection, |
| topic | Accelerators and Storage Rings |
| url | http://cds.cern.ch/record/2753934 |
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