Femtosecond x-rays from Thomson scattering using laser wakefield accelerators
Open accessAbstract
The possibility of producing femtosecond x-rays through Thomson scattering high power laser beams off laser wakefield generated relativistic electron beams is discussed. The electron beams are produced with either a self-modulated laser wakefield accelerator (SM-LWFA) or through a standard laser wakefield accelerator (LWFA) with optical injection. For an SM-LWFA (LWFA) produced electron beam, a broad (narrow) energy distribution is assumed, resulting in x-ray spectra that are broadband (monochromatic). Designs are presented for 3-100 fs x-ray pulses and the expected flux and brightness of these sources are compared.
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The peak current is on the order of 10 kA with emittance comparable to the best state of the art RF facilities.
“The peak current is on the order of 10 kA with emittance comparable to the best state of the art RF facilities 11 .”
From High-quality electron beams from a laser wakefield accelerator using plasma-channel guiding (2004) · cites this paper as [11]
In Section III, the paper reports at least 5 nC per bunch for the self-modulated laser wakefield accelerator; Table I gives a 100 fs bunch length, implying a peak current on the order of 10 kA. Table I also lists a normalized emittance of 1 mm-mrad, but the paper does not establish that this is comparable to the best state-of-the-art RF facilities. Page numbers were not available in our copy. (LLM, conf=0.82)
Experimental — accuracy not yet measuredMany applications including high energy physics and radiation sources require monoenergetic beams (percent energy spread or less) with at least 10^9 electrons.
“While these beams are useful for some users 9 , many applications including high energy physics and radiation sources require monoenergetic beams (percent energy spread or less) with at least 10 9 electrons [10][11][12][13] .”
From High-quality electron beams from a laser wakefield accelerator using plasma-channel guiding (2004) · cites this paper as [11]
Section II explains that a broad electron-energy distribution degrades the Thomson-scattered radiation spectrum, and the Conclusion says low energy spread enables greater peak brightness. But the paper does not state that high-energy physics and radiation-source applications require percent-level energy spread and at least 10^9 electrons together. Its narrow-spread injector example in Section III.B instead gives approximately 0.5–1.5 × 10^7 electrons. (LLM, conf=0.88)
Experimental — accuracy not yet measured
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High-quality electron beams from a laser wakefield accelerator using plasma-channel guiding
Geddes, C. G. R., Toth, C., van Tilborg, J., Esarey, E., Schroeder, C. B., Bruhwiler, D., Nieter, C., Cary, J., & Leemans, W. P. (2004) · Nature · doi:10.1038/nature02900 · Cited by 2,001 · see citing works
Self-citation
- Authors
- Catravas, P., Esarey, E., & Leemans, W. P.
- Affiliations
- Lawrence Berkeley National Laboratory (US)
- ORCID
- Leemans, W P
- Venue
- Measurement Science and Technology
- Publisher
- IOP Publishing
- Published
- 2001-10-09
- Volume
- 12
- Issue
- 11
- Pages
- 1828-1834
- ISSN
- 0957-0233 (ISSN-L)
- 1361-6501
- OpenAlex
- W1991294576
- Cited by
- 80
- References
- 37
- Citations by year
- 2026: 2 · 2025: 4 · 2022: 4 · 2020: 2 · 2019: 3 · 2018: 2 · 2017: 4 · 2016: 2 · 2015: 6 · 2014: 3 · 2013: 4 · 2012: 5
- FWCI
- 1.84
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Measurement Science and Technology (publishedVersion)
- OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
- University of North Texas Digital Library (University of North Texas) (submittedVersion)
- eScholarship (California Digital Library) (submittedVersion)
- Funders
- U.S. Department of Energy
- Topics
- Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Laser-Plasma Interactions and Diagnostics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Particle Accelerators and Free-Electron Lasers
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Laser-Matter Interactions and Applications
- Keywords
- Thomson scattering, laser wakefield acceleration, relativistic electron beams, optical injection, X-ray spectra, X-ray brightness, X-ray flux, laser-plasma interaction
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