Attosecond and femtosecond beam shaping for nonlinear X-ray spectroscopy with X-ray free-electron laser
Abstract/Contents
- Abstract
- X-ray Free-Electron Lasers (XFELs) are the brightest source of X-ray radiation with sufficient intensity to perform nonlinear X-ray spectroscopy, such as pump-probe experiments. By extending the nonlinear soft X-ray pump-probe techniques to few-femtosecond and attosecond timescales, we can probe the motion of valence electrons in molecular systems on their natural time scale. In this thesis, I will discuss two projects that use advanced electron beam shaping techniques to generate attosecond soft X-ray FEL pulse pairs and high-intensity few-femtosecond pulses at the Linac Coherent Light Source (LCLS). In the first project, we demonstrated the generation and control of two-color soft X-ray FEL pulse pairs with attosecond-scale durations and timing stability. We employed angular streaking to measure the time delay between pump/probe pulses. These gigawatt-level attosecond soft X-ray FEL pump/probe pulse pairs have been applied to directly time-resolve the charge migration in molecules. In the second project, we used the wakefield of a corrugated structure called a dechirper to produce a nondestructive transverse kick in the electron beam and selectively radiated different slices of the electron beam in multiple stages, enabling the generation of few-femtosecond soft X-ray FEL pulses with peak power of hundreds of gigawatts.
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 | 2023; ©2023 |
| Publication date | 2023; 2023 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Author | Guo, Zhaoheng |
|---|---|
| Degree supervisor | Huang, Zhirong, 1968- |
| Degree supervisor | Marinelli, Agostino |
| Thesis advisor | Huang, Zhirong, 1968- |
| Thesis advisor | Marinelli, Agostino |
| Thesis advisor | Raubenheimer, Tor O |
| Degree committee member | Raubenheimer, Tor O |
| 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 | Zhaoheng Guo. |
|---|---|
| Note | Submitted to the Department of Applied Physics. |
| Thesis | Thesis Ph.D. Stanford University 2023. |
| Location | https://purl.stanford.edu/sq018tt8520 |
Access conditions
- Copyright
- © 2023 by Zhaoheng Guo
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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