Multicomponent measurements of the Jefferson Lab energy recovery linac electron beam using optical transition and diffraction radiation

High brightness electron accelerators, such as energy recovery linacs (ERL), often have complex particle distributions that can create difficulties in beam transport as well as matching to devices such as wigglers used to generate radiation from the beam. Optical transition radiation (OTR), OTR inte...

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Bibliographic Details
Published in:Physical review special topics. PRST-AB. Accelerators and beams 2008-08, Vol.11 (8), p.082801, Article 082801
Main Authors: Holloway, M. A., Fiorito, R. B., Shkvarunets, A. G., O’Shea, P. G., Benson, S. V., Douglas, D., Evtushenko, P., Jordan, K.
Format: Article
Language:English
Subjects:
Charged particles
Diffraction
Diffraction radiation
Electron accelerators
Electron beams
Emittance
Energy recovery
Interferometry
Optical transition
Particle accelerators
Particle beams
Radiation
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Summary:High brightness electron accelerators, such as energy recovery linacs (ERL), often have complex particle distributions that can create difficulties in beam transport as well as matching to devices such as wigglers used to generate radiation from the beam. Optical transition radiation (OTR), OTR interferometry (OTRI), and optical diffraction-transition radiation interferometry (ODTRI) have proven to be effective tools for diagnosing both the spatial and angular distributions of charged particle beams. OTRI and ODTRI have been used to measure rms divergences, and optical transverse phase space mapping has been demonstrated using OTRI. In this work we present the results of diagnostic experiments using OTR and optical diffraction radiation conducted at the Jefferson Laboratory’s 115 MeV ERL which show the presence of two separate components within the beam’s spatial and angular distributions. By assuming a correlation between the spatial and angular features, we estimate an rms emittance value for each of the two components.
ISSN:1098-4402
1098-4402
2469-9888
DOI:10.1103/PhysRevSTAB.11.082801