Beam halo creation and propagation in the University of Maryland Electron Ring

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dc.contributor.advisorO'Shea, Patrick Gen_US
dc.contributor.advisorKishek, Rami Aen_US
dc.contributor.authorPapadopoulos, Christos F.en_US
dc.contributor.departmentPhysicsen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2009-10-06T06:20:20Z
dc.date.available2009-10-06T06:20:20Z
dc.date.issued2009en_US
dc.description.abstractIn this thesis we discuss the phenomenon of halo creation in charged particle beams. For this, we combine analytical, numerical and experimental work, which focuses on the University of Maryland Electron Ring, but is applicable to a wide range of accelerators in the same intensity regime. We find that the details of the beam distribution do not affect the structure of the halo, but are nonetheless important as they determine the number of particles in the halo and whether the latter can be regenerated. Furthermore, we show that the halo in configuration and velocity space comprises of the same particles, a prediction that has great importance for halo removal and diagnostics. In particular, we show that even in the case of ideal halo removal in phase space, the complicated internal dynamics of the beam core lead to halo regeneration. Following on previous work, we also construct a theoretical particle-core model for a skew quadrupole focusing channel, and compare the results to PIC simulations as well as measurements on UMER. The agreement between these three approaches is satisfactory, within the constraints of each case.en_US
dc.format.extent6388004 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/1903/9590
dc.language.isoen_US
dc.subject.pqcontrolledPhysics, Fluid and Plasmaen_US
dc.subject.pqcontrolledPhysics, Electricity and Magnetismen_US
dc.subject.pquncontrolledbeam haloen_US
dc.subject.pquncontrolledcollimationen_US
dc.subject.pquncontrolledintense beamsen_US
dc.subject.pquncontrolledparticle acceleratoren_US
dc.subject.pquncontrolledparticle core modelen_US
dc.subject.pquncontrolledskew quadrupolesen_US
dc.titleBeam halo creation and propagation in the University of Maryland Electron Ringen_US
dc.typeDissertationen_US

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