Capture and acceleration of sub-100 keV electrons with alternating phase focusing silicon dielectric laser accelerator structures
Abstract/Contents
- Abstract
- We demonstrate a silicon-based electron accelerator that uses laser optical near fields to both accelerate and confine electrons over extended distances. Two dielectric laser accelerators (DLA) designs were tested, each consisting of two arrays of silicon pillars pumped symmetrically by pulse front tilted (PFT) laser beams, designed for average acceleration gradients 35MeV/m and 50MeV/m respectively. The DLA are designed to act as Alternating Phase Focusing (APF) lattices, where electrons, depending on the electron-laser interaction phase, will experience alternating longitudinal/transverse focusing/defocusing. By incorporating fractional period drift sections that alter the synchronous phase between ± 60 degrees off-crest, electrons captured in the designed acceleration bucket experience half the peak gradient as average gradient while also experiencing strong confinement forces that enable long interaction lengths. We demonstrate APF accelerators with interaction lengths up to 708μm and energy gains up to 23.7 ± 1.07 keV FWHM, a 25% increase from starting energy, demonstrating the ability to achieve substantial energy gains with sub-relativistic DLA. Also shown is the work on designing/producing a Silicon 1D grating used in the first demonstration of the quantum nature of DLA, and the post-processing of foundry chips for use as a DLA platform.
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 | Broaddus, Payton Nash |
|---|---|
| Degree supervisor | Solgaard, Olav |
| Thesis advisor | Solgaard, Olav |
| Thesis advisor | Harris, J. S. (James Stewart), 1942- |
| Thesis advisor | Howe, Roger Thomas |
| Degree committee member | Harris, J. S. (James Stewart), 1942- |
| Degree committee member | Howe, Roger Thomas |
| Associated with | Stanford University, School of Engineering |
| Associated with | Stanford University, Department of Electrical Engineering |
Subjects
| Genre | Theses |
|---|---|
| Genre | Text |
Bibliographic information
| Statement of responsibility | Payton Broaddus. |
|---|---|
| Note | Submitted to the Department of Electrical Engineering. |
| Thesis | Thesis Ph.D. Stanford University 2023. |
| Location | https://purl.stanford.edu/hc095dz6607 |
Access conditions
- Copyright
- © 2023 by Payton Nash Broaddus
- License
- This work is licensed under a Creative Commons Attribution 3.0 Unported license (CC BY).
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