Progress towards cavity-based X-ray free-electron lasers : demonstration of cavity ringdown and microbunch rotation out-coupling
Abstract/Contents
- Abstract
- Current X-ray Free-Electron Lasers (XFELs), including the Linac Coherent Light Source (LCLS) at SLAC, are single-pass SASE (self-amplified spontaneous emission) machines, where electrons produce X-rays as they pass through an undulator line just once. The exponential gain of X-ray power in an XFEL occurs as X-rays act on the electron beam, causing it to form microbunches at the X-ray wavelength. In a SASE XFEL, the X-rays which initiate this process come from noise in the beam, and thus X-rays produced by current XFELs are transversely coherent, but longitudinally noisy. In proposed cavity-based XFELs (CBXFELs), by contrast, X-rays are spectrally filtered and returned by mirrors from the end of the undulator line to the beginning, so a strong X-ray pulse is used to seed the FEL process on subsequent passes. Future X-ray light sources based on CBXFELs can thus improve longitudinal coherence and spectral brightness, and promise to be more stable than current XFELs. In this thesis I discuss the requirements to build a CBXFEL cavity and several aspects of CBXFEL development. I cover in detail the characterization of CBXFEL-quality diamond mirrors, two cavity out-coupling methods including active cavity Q-switching and microbunch rotation, and a demonstration of a 14 m Bragg-reflecting cavity.
Description
| Type of resource | text |
|---|---|
| Form | electronic resource; remote; computer; online resource |
| Extent | 1 online resource. |
| Place | California |
| Place | [Stanford, California] |
| Publisher | [Stanford University] |
| Copyright date | 2024; ©2024 |
| Publication date | 2024; 2024 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Author | Margraf, Rachel A |
|---|---|
| Degree supervisor | Huang, Zhirong, 1968- |
| Thesis advisor | Huang, Zhirong, 1968- |
| Thesis advisor | Marinelli, Agostino |
| Thesis advisor | Reis, David A, 1970- |
| Degree committee member | Marinelli, Agostino |
| Degree committee member | Reis, David A, 1970- |
| Associated with | Stanford University, School of Humanities and Sciences |
| Associated with | Stanford University, Department of Applied Physics |
Subjects
| Genre | Theses |
|---|---|
| Genre | Text |
Bibliographic information
| Statement of responsibility | Rachel Margraf-O'Neal. |
|---|---|
| Note | Submitted to the Department of Applied Physics. |
| Thesis | Thesis Ph.D. Stanford University 2024. |
| Location | https://purl.stanford.edu/wz905tt6508 |
Access conditions
- Copyright
- © 2024 by Rachel A Margraf
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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