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Optics model
The LHC optics quality after the 2015 commissioning is reviewed. Optics corrections were limited due to a variety of problems. This includes disturbed dispersion measurements due to orbit drifts and an unexpected shift of the IP β-function (β *) waist. The resulting issues will become more critical...
| Autores principales: | , , , , , , , , |
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| Lenguaje: | eng |
| Publicado: |
CERN
2016
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| Materias: | |
| Acceso en línea: | http://cds.cern.ch/record/2294517 |
| _version_ | 1780956654215364608 |
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| author | Langner, A Carlier, F Coello De Portugal, J Garcia-Tabares Valdivieso,A Maclean, E H Malina, L Persson, T H B Skowronski, P K Tomás, R |
| author_facet | Langner, A Carlier, F Coello De Portugal, J Garcia-Tabares Valdivieso,A Maclean, E H Malina, L Persson, T H B Skowronski, P K Tomás, R |
| author_sort | Langner, A |
| collection | CERN |
| description | The LHC optics quality after the 2015 commissioning is reviewed. Optics
corrections were limited due to a variety of problems. This includes disturbed
dispersion measurements due to orbit drifts and an unexpected shift of the IP
β-function (β *) waist. The resulting issues will become more critical at the
smaller β * of 40 cm foreseen for 2016. Therefore , an improved optics
correction strategy with desired actions for the 2016 commissioning is proposed.
The optics quality during combined ramp and squeeze is presented and the
benefits of ballistic optics measurements are discussed. The optics stability
over time and the correction of interaction region (IR) non-linearities are also
reviewed. |
| id | oai-inspirehep.net-1637704 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2016 |
| publisher | CERN |
| record_format | invenio |
| spelling | oai-inspirehep.net-16377042019-09-30T06:29:59Zhttp://cds.cern.ch/record/2294517engLangner, ACarlier, FCoello De Portugal, JGarcia-Tabares Valdivieso,AMaclean, E HMalina, LPersson, T H BSkowronski, P KTomás, ROptics modelAccelerators and Storage RingsThe LHC optics quality after the 2015 commissioning is reviewed. Optics corrections were limited due to a variety of problems. This includes disturbed dispersion measurements due to orbit drifts and an unexpected shift of the IP β-function (β *) waist. The resulting issues will become more critical at the smaller β * of 40 cm foreseen for 2016. Therefore , an improved optics correction strategy with desired actions for the 2016 commissioning is proposed. The optics quality during combined ramp and squeeze is presented and the benefits of ballistic optics measurements are discussed. The optics stability over time and the correction of interaction region (IR) non-linearities are also reviewed.CERNoai:inspirehep.net:16377042016 |
| spellingShingle | Accelerators and Storage Rings Langner, A Carlier, F Coello De Portugal, J Garcia-Tabares Valdivieso,A Maclean, E H Malina, L Persson, T H B Skowronski, P K Tomás, R Optics model |
| title | Optics model |
| title_full | Optics model |
| title_fullStr | Optics model |
| title_full_unstemmed | Optics model |
| title_short | Optics model |
| title_sort | optics model |
| topic | Accelerators and Storage Rings |
| url | http://cds.cern.ch/record/2294517 |
| work_keys_str_mv | AT langnera opticsmodel AT carlierf opticsmodel AT coellodeportugalj opticsmodel AT garciatabaresvaldiviesoa opticsmodel AT macleaneh opticsmodel AT malinal opticsmodel AT perssonthb opticsmodel AT skowronskipk opticsmodel AT tomasr opticsmodel |