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Effects of RF breakdown on the beam in a CLIC prototype accelerator structure
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.ORCID iD: 0000-0002-6815-2794
CEA/DSM/IRFU, Saclay, France.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
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(English)Manuscript (preprint) (Other academic)
Abstract [en]

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.

Keyword [en]
RF breakdown, transverse kick, TBTS, CTF3, CLIC
National Category
Accelerator Physics and Instrumentation
Research subject
Physics
Identifiers
URN: urn:nbn:se:uu:diva-192548OAI: oai:DiVA.org:uu-192548DiVA: diva2:599949
Funder
EU, FP7, Seventh Framework Programme, 227579Knut and Alice Wallenberg FoundationSwedish Research Council
Available from: 2013-01-22 Created: 2013-01-22 Last updated: 2013-09-25

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http://arxiv.org/abs/1301.4673

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Palaia, AndreaRuber, RogerZiemann, Volker

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Palaia, AndreaRuber, RogerZiemann, Volker
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High Energy PhysicsDepartment of Physics and Astronomy
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CiteExportLink to record
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Citation style
  • apa
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  • nn-NB
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Output format
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