High brightness electron beams for fourth generation light sources
Abstract/Contents
- Abstract
- In this dissertation, we examine the production and preservation of high brightness electron beams for fourth generation light sources. The relentless push toward brighter photon pulses from Free Electron Lasers (FELs) has been facilitated by an increase in the brightness of the driving electron beam. One method of increasing this brightness is to provide an electron beam which is pre-bunched at the FEL wavelength, thereby providing a fully coherent seed for the lasing process. We explore the technique of Echo-Enabled Harmonic Generation (EEHG) to seed the electron beam at a high harmonic wavelength of a conventional, fully coherent laser pulse. We build on the previous work at the Next Linear Collider Test Accelerator (NLCTA) to extend the harmonic up-conversion via EEHG to the 75th harmonic and demonstrate the ability to create multi-color, tunable bunching spectra using a chirped electron beam and the EEHG technique. We also examine with detailed numerical simulations the interplay between the microbunching instability and EEHG. Additionally, we develop a theoretical model for a novel source of emittance degradation due to a stochastic addition to the standard Coherent Synchrotron Radiation field. This effect is found to grow with both electron beam energy and density, potentially limiting the ultimate brightness of some electron beams. Physically, the effect is found to be due to the stochastic scattering of electrons off the narrow-angle synchrotron radiation cones of other electrons as they traverse a bend magnet. This novel effect is another manifestation of the difficulties posed as the electron beam brightness is continually increased.
Description
| Type of resource | text |
|---|---|
| Form | electronic; electronic resource; remote |
| Extent | 1 online resource. |
| Publication date | 2017 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Associated with | Garcia, Bryant William |
|---|---|
| Associated with | Stanford University, Department of Physics. |
| Primary advisor | Raubenheimer, Tor O |
| Thesis advisor | Raubenheimer, Tor O |
| Thesis advisor | Blandford, Roger D |
| Thesis advisor | Huang, Zhirong |
| Advisor | Blandford, Roger D |
| Advisor | Huang, Zhirong |
Subjects
| Genre | Theses |
|---|
Bibliographic information
| Statement of responsibility | Bryant William Garcia. |
|---|---|
| Note | Submitted to the Department of Physics. |
| Thesis | Thesis (Ph.D.)--Stanford University, 2017. |
| Location | electronic resource |
Access conditions
- Copyright
- © 2017 by Bryant W. Garcia
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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