Cargando…

Effects of RF breakdown on the beam in a CLIC prototype accelerator structure

Understanding the effects of RF breakdown in high-gradient accelerator structures on the accelerated beam is an extremely relevant aspect in the development of the Compact Linear Collider (CLIC) and is one of the main issues addressed at the Two-beam Test Stand at the CLIC Test Facility 3 at CERN. D...

Descripción completa

Detalles Bibliográficos
Autores principales: Palaia, A., Jacewicz, M., Ruber, R., Ziemann, V., Farabolini, W.
Lenguaje:eng
Publicado: 2013
Materias:
Acceso en línea:https://dx.doi.org/10.1103/PhysRevSTAB.16.081004
https://dx.doi.org/10.1103/PhysRevSTAB.16.129901
http://cds.cern.ch/record/1507954
_version_ 1780927538556567552
author Palaia, A.
Jacewicz, M.
Ruber, R.
Ziemann, V.
Farabolini, W.
author_facet Palaia, A.
Jacewicz, M.
Ruber, R.
Ziemann, V.
Farabolini, W.
author_sort Palaia, A.
collection CERN
description Understanding the effects of RF breakdown in high-gradient accelerator structures on the accelerated beam is an extremely relevant aspect in the development of the Compact Linear Collider (CLIC) and is one of the main issues addressed at the Two-beam Test Stand at the CLIC Test Facility 3 at CERN. During a RF breakdown large electro-magnetic fields are generated and produce parasitic magnetic fields which interact with the accelerated beam affecting its orbit and energy. We discuss here measurements of such effects observed on an electron beam accelerated in a CLIC prototype structure. Measurements of the trajectory of bunch-trains on a nanosecond time-scale showed fast changes in correspondence of breakdown which we compare with measurements of the relative beam spots on a scintillating screen. We identify different breakdown scenarios for which we offer an explanation based also on measurements of the power at the input and output ports of the accelerator structure. Finally we present the distribution of the magnitude of the observed changes in the beam orbit and we discuss its correlation with RF power and breakdown location in the accelerator structure.
id cern-1507954
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2013
record_format invenio
spelling cern-15079542021-05-03T20:15:51Zdoi:10.1103/PhysRevSTAB.16.081004doi:10.1103/PhysRevSTAB.16.129901http://cds.cern.ch/record/1507954engPalaia, A.Jacewicz, M.Ruber, R.Ziemann, V.Farabolini, W.Effects of RF breakdown on the beam in a CLIC prototype accelerator structureAccelerators and Storage RingsUnderstanding the effects of RF breakdown in high-gradient accelerator structures on the accelerated beam is an extremely relevant aspect in the development of the Compact Linear Collider (CLIC) and is one of the main issues addressed at the Two-beam Test Stand at the CLIC Test Facility 3 at CERN. During a RF breakdown large electro-magnetic fields are generated and produce parasitic magnetic fields which interact with the accelerated beam affecting its orbit and energy. We discuss here measurements of such effects observed on an electron beam accelerated in a CLIC prototype structure. Measurements of the trajectory of bunch-trains on a nanosecond time-scale showed fast changes in correspondence of breakdown which we compare with measurements of the relative beam spots on a scintillating screen. We identify different breakdown scenarios for which we offer an explanation based also on measurements of the power at the input and output ports of the accelerator structure. Finally we present the distribution of the magnitude of the observed changes in the beam orbit and we discuss its correlation with RF power and breakdown location in the accelerator structure.Understanding the effects of RF breakdown in high-gradient accelerator structures on the accelerated beam is an extremely relevant aspect in the development of the Compact Linear Collider (CLIC) and is one of the main issues addressed at the Two-beam Test Stand at the CLIC Test Facility 3 at CERN. During a RF breakdown large electro-magnetic fields are generated and produce parasitic magnetic fields which interact with the accelerated beam affecting its orbit and energy. We discuss here measurements of such effects observed on an electron beam accelerated in a CLIC prototype structure. Measurements of the trajectory of bunch-trains on a nanosecond time-scale showed fast changes in correspondence of breakdown which we compare with measurements of the relative beam spots on a scintillating screen. We identify different breakdown scenarios for which we offer an explanation based also on measurements of the power at the input and output ports of the accelerator structure. Finally we present the distribution of the magnitude of the observed changes in the beam orbit and we discuss its correlation with RF power and breakdown location in the accelerator structure.Understanding the effects of rf breakdown in high-gradient accelerator structures on the accelerated beam is an extremely relevant aspect in the development of the Compact Linear Collider (CLIC) and is one of the main issues addressed at the Two-beam Test Stand at the CLIC Test Facility 3 at CERN. During a rf breakdown high currents are generated causing parasitic magnetic fields that interact with the accelerated beam affecting its orbit. The beam energy is also affected because the power is partly reflected and partly absorbed thus reducing the available energy to accelerate the beam. We discuss here measurements of such effects observed on an electron beam accelerated in a CLIC prototype structure. Measurements of the trajectory of bunch trains on a nanosecond time scale showed fast changes in correspondence of breakdown that we compare with measurements of the relative beam spots on a scintillating screen. We identify different breakdown scenarios for which we offer an explanation based also on measurements of the power at the input and output ports of the accelerator structure. Finally we present the distribution of the magnitude of the observed changes in the beam position and we discuss its correlation with rf power and breakdown location in the accelerator structure.arXiv:1301.4673oai:cds.cern.ch:15079542013-01-22
spellingShingle Accelerators and Storage Rings
Palaia, A.
Jacewicz, M.
Ruber, R.
Ziemann, V.
Farabolini, W.
Effects of RF breakdown on the beam in a CLIC prototype accelerator structure
title Effects of RF breakdown on the beam in a CLIC prototype accelerator structure
title_full Effects of RF breakdown on the beam in a CLIC prototype accelerator structure
title_fullStr Effects of RF breakdown on the beam in a CLIC prototype accelerator structure
title_full_unstemmed Effects of RF breakdown on the beam in a CLIC prototype accelerator structure
title_short Effects of RF breakdown on the beam in a CLIC prototype accelerator structure
title_sort effects of rf breakdown on the beam in a clic prototype accelerator structure
topic Accelerators and Storage Rings
url https://dx.doi.org/10.1103/PhysRevSTAB.16.081004
https://dx.doi.org/10.1103/PhysRevSTAB.16.129901
http://cds.cern.ch/record/1507954
work_keys_str_mv AT palaiaa effectsofrfbreakdownonthebeaminaclicprototypeacceleratorstructure
AT jacewiczm effectsofrfbreakdownonthebeaminaclicprototypeacceleratorstructure
AT ruberr effectsofrfbreakdownonthebeaminaclicprototypeacceleratorstructure
AT ziemannv effectsofrfbreakdownonthebeaminaclicprototypeacceleratorstructure
AT faraboliniw effectsofrfbreakdownonthebeaminaclicprototypeacceleratorstructure