Cargando…
A Method for Determining the Roll Angle of the CLIC Accelerating Structures From the Beam Shape Downstream of the Structure
The Compact Linear Collider (CLIC) accelerating structures have a four-fold symmetry from the radial waveguides for damping higher order modes. This symmetry allows for an octupole component of the rf fields to co-propagate with the main accelerating field. The effect of this octupole mode has been...
Autores principales: | , , |
---|---|
Lenguaje: | eng |
Publicado: |
2017
|
Materias: | |
Acceso en línea: | https://dx.doi.org/10.18429/JACoW-IPAC2017-MOPAB107 http://cds.cern.ch/record/2674351 |
_version_ | 1780962627020652544 |
---|---|
author | Ögren, Jim Farabolini, Wilfrid Ziemann, Volker |
author_facet | Ögren, Jim Farabolini, Wilfrid Ziemann, Volker |
author_sort | Ögren, Jim |
collection | CERN |
description | The Compact Linear Collider (CLIC) accelerating structures have a four-fold symmetry from the radial waveguides for damping higher order modes. This symmetry allows for an octupole component of the rf fields to co-propagate with the main accelerating field. The effect of this octupole mode has been observed at the CLIC test facility 3. In CLIC the accelerating structures are mounted together on a moveable girders. There are four vertical and four horizontal actuators on the girder, which allows for 5D control in a limited range and for instance we can roll the girder. By observing the beam shape perturbed by the octupole field on a screen downstream from the structure we can determine the roll angle and thus align the structure azimuthally. Here we discuss a possible method and show some preliminary results. |
id | oai-inspirehep.net-1707394 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2017 |
record_format | invenio |
spelling | oai-inspirehep.net-17073942019-09-30T06:29:59Zdoi:10.18429/JACoW-IPAC2017-MOPAB107http://cds.cern.ch/record/2674351engÖgren, JimFarabolini, WilfridZiemann, VolkerA Method for Determining the Roll Angle of the CLIC Accelerating Structures From the Beam Shape Downstream of the StructureAccelerators and Storage RingsThe Compact Linear Collider (CLIC) accelerating structures have a four-fold symmetry from the radial waveguides for damping higher order modes. This symmetry allows for an octupole component of the rf fields to co-propagate with the main accelerating field. The effect of this octupole mode has been observed at the CLIC test facility 3. In CLIC the accelerating structures are mounted together on a moveable girders. There are four vertical and four horizontal actuators on the girder, which allows for 5D control in a limited range and for instance we can roll the girder. By observing the beam shape perturbed by the octupole field on a screen downstream from the structure we can determine the roll angle and thus align the structure azimuthally. Here we discuss a possible method and show some preliminary results.oai:inspirehep.net:17073942017 |
spellingShingle | Accelerators and Storage Rings Ögren, Jim Farabolini, Wilfrid Ziemann, Volker A Method for Determining the Roll Angle of the CLIC Accelerating Structures From the Beam Shape Downstream of the Structure |
title | A Method for Determining the Roll Angle of the CLIC Accelerating Structures From the Beam Shape Downstream of the Structure |
title_full | A Method for Determining the Roll Angle of the CLIC Accelerating Structures From the Beam Shape Downstream of the Structure |
title_fullStr | A Method for Determining the Roll Angle of the CLIC Accelerating Structures From the Beam Shape Downstream of the Structure |
title_full_unstemmed | A Method for Determining the Roll Angle of the CLIC Accelerating Structures From the Beam Shape Downstream of the Structure |
title_short | A Method for Determining the Roll Angle of the CLIC Accelerating Structures From the Beam Shape Downstream of the Structure |
title_sort | method for determining the roll angle of the clic accelerating structures from the beam shape downstream of the structure |
topic | Accelerators and Storage Rings |
url | https://dx.doi.org/10.18429/JACoW-IPAC2017-MOPAB107 http://cds.cern.ch/record/2674351 |
work_keys_str_mv | AT ogrenjim amethodfordeterminingtherollangleoftheclicacceleratingstructuresfromthebeamshapedownstreamofthestructure AT faraboliniwilfrid amethodfordeterminingtherollangleoftheclicacceleratingstructuresfromthebeamshapedownstreamofthestructure AT ziemannvolker amethodfordeterminingtherollangleoftheclicacceleratingstructuresfromthebeamshapedownstreamofthestructure AT ogrenjim methodfordeterminingtherollangleoftheclicacceleratingstructuresfromthebeamshapedownstreamofthestructure AT faraboliniwilfrid methodfordeterminingtherollangleoftheclicacceleratingstructuresfromthebeamshapedownstreamofthestructure AT ziemannvolker methodfordeterminingtherollangleoftheclicacceleratingstructuresfromthebeamshapedownstreamofthestructure |