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Report from LHC MD 1391: First tests of the variation of amplitude detuning with crossing angle as an observable for high-order errors in low-β∗ colliders
Nonlinear errors in experimental insertions can pose a significant challenge to the operability of low-β∗ colliders. When crossing schemes are applied high-order errors, such as decapole and dodecapole multipole components in triplets and separation dipoles, can feed-down to give a normal octupole pe...
| Autores principales: | , , , , , |
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| Lenguaje: | eng |
| Publicado: |
2017
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| Materias: | |
| Acceso en línea: | http://cds.cern.ch/record/2314409 |
| _version_ | 1780958104452595712 |
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| author | Maclean, Ewen Hamish Carlier, Felix Simon Fuchsberger, Kajetan Giovannozzi, Massimo Persson, Tobias Hakan Bjorn Tomas Garcia, Rogelio |
| author_facet | Maclean, Ewen Hamish Carlier, Felix Simon Fuchsberger, Kajetan Giovannozzi, Massimo Persson, Tobias Hakan Bjorn Tomas Garcia, Rogelio |
| author_sort | Maclean, Ewen Hamish |
| collection | CERN |
| description | Nonlinear errors in experimental insertions can pose a significant challenge to the operability of low-β∗ colliders. When crossing schemes are applied high-order errors, such as decapole and dodecapole multipole components in triplets and separation dipoles, can feed-down to give a normal octupole perturbation. Such fields may contribute to distortion of the assumed tune footprint, influencing lifetime and the Landau damping of instabilities. Conversely, comparison of amplitude detuning coefficients with and without crossing schemes applied should allow for the beam-based study of such high-order errors. In this note first measurements of amplitude detuning with crossing bumps in the experimental insertions are reported. |
| id | cern-2314409 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2017 |
| record_format | invenio |
| spelling | cern-23144092019-09-30T06:29:59Zhttp://cds.cern.ch/record/2314409engMaclean, Ewen HamishCarlier, Felix SimonFuchsberger, KajetanGiovannozzi, MassimoPersson, Tobias Hakan BjornTomas Garcia, RogelioReport from LHC MD 1391: First tests of the variation of amplitude detuning with crossing angle as an observable for high-order errors in low-β∗ collidersAccelerators and Storage RingsNonlinear errors in experimental insertions can pose a significant challenge to the operability of low-β∗ colliders. When crossing schemes are applied high-order errors, such as decapole and dodecapole multipole components in triplets and separation dipoles, can feed-down to give a normal octupole perturbation. Such fields may contribute to distortion of the assumed tune footprint, influencing lifetime and the Landau damping of instabilities. Conversely, comparison of amplitude detuning coefficients with and without crossing schemes applied should allow for the beam-based study of such high-order errors. In this note first measurements of amplitude detuning with crossing bumps in the experimental insertions are reported.CERN-ACC-NOTE-2018-0034oai:cds.cern.ch:23144092017-01-01 |
| spellingShingle | Accelerators and Storage Rings Maclean, Ewen Hamish Carlier, Felix Simon Fuchsberger, Kajetan Giovannozzi, Massimo Persson, Tobias Hakan Bjorn Tomas Garcia, Rogelio Report from LHC MD 1391: First tests of the variation of amplitude detuning with crossing angle as an observable for high-order errors in low-β∗ colliders |
| title | Report from LHC MD 1391: First tests of the variation of amplitude detuning with crossing angle as an observable for high-order errors in low-β∗ colliders |
| title_full | Report from LHC MD 1391: First tests of the variation of amplitude detuning with crossing angle as an observable for high-order errors in low-β∗ colliders |
| title_fullStr | Report from LHC MD 1391: First tests of the variation of amplitude detuning with crossing angle as an observable for high-order errors in low-β∗ colliders |
| title_full_unstemmed | Report from LHC MD 1391: First tests of the variation of amplitude detuning with crossing angle as an observable for high-order errors in low-β∗ colliders |
| title_short | Report from LHC MD 1391: First tests of the variation of amplitude detuning with crossing angle as an observable for high-order errors in low-β∗ colliders |
| title_sort | report from lhc md 1391: first tests of the variation of amplitude detuning with crossing angle as an observable for high-order errors in low-β∗ colliders |
| topic | Accelerators and Storage Rings |
| url | http://cds.cern.ch/record/2314409 |
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