Publication Date

2018

Document Type

Dissertation/Thesis

First Advisor

Piot, Philippe

Degree Name

Ph.D. (Doctor of Philosophy)

Department

Department of Physics

LCSH

Physics

Abstract

This dissertation describes advanced techniques of phase space manipulations of the electron beam for improving performance and efficiency of high brightness X-ray light sources based on the free-electron Laser (FEL) and inverse-Compton scattering (ICS) processes. In particular, it first discusses a novel bunch-compression scheme based on a double transverse-to-longitudinal phase-space exchanger - dubbed emittance exchanger (EEX) - separated by a demagnifying transverse-optics system. While the outline of the scheme is quite sophisticated, the basic physics behind it is quite straight-forward. The benefits and disadvantages of these scheme are compared to the conventional approach of compressing a bunch using a magnetic bunch-compression chicane. The second scheme discussed in this dissertation is a novel beamline for imposing and removing the energy slew along the bunch also known as chirping and dechirping the beam in the accelerator community. This scheme consists of transverse deflecting cavities separated by drifts and relies on imposing and removing the transverse-longitudinal correlations on the electron beam. The benefits of this alternative method are compared with standard schemes of chirping and dechirping the beam via an off-crest acceleration. Finally, a novel 6-dimensional theory of the ICS source concludes this dissertation. It derives the photon distribution in 6D phase space describing radiation produced in the process of scattering a laser pulse off a relativistic electron beam as a function of electron distribution in the phase space using the Wigner function formalism. This result opens up the possibility for the optimization of the brightness of an ICS source via imposing transverse-longitudinal correlations on the beam.

Comments

Committee members: Erdelyi, Bela; Yamplosky, Nikolai; Zutshi, Vishnu.||Advisor: Piot, Philippe.||Includes illustrations.||Includes bibliographical references.

Extent

233 pages

Language

eng

Publisher

Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type

Text

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