dorsal/arxiv
View SchemaThe Effect of Laser Focusing Conditions on Propagation and Monoenergetic Electron Production in Laser Wakefield Accelerators
| Authors | A. G. R. Thomas, Z. Najmudin, S. P. D. Mangles, C. D. Murphy, A. E. Dangor, C. Kamperidis, K. L. Lancaster, W. B. Mori, P. A. Norreys, W. Rozmus, K. Krushelnick |
|---|---|
| Categories | |
| ArXiv ID | physics/0701186 |
| URL | https://arxiv.org/abs/physics/0701186 |
| DOI | 10.1103/PhysRevLett.98.095004 |
| Journal | Phys.Rev.Lett.98:095004,2007 |
Abstract
The effect of laser focusing conditions on the evolution of relativistic plasma waves in laser wakefield accelerators is studied both experimentally and with particle-in-cell simulations. For short focal length ($w_0 < \lambda_p$) interactions, beam break-up prevents stable propagation of the pulse. High field gradients lead to non-localized phase injection of electrons, and thus broad energy spread beams. However for long focal length geometries ($w_0 > \lambda_p$), a single optical filament can capture the majority of the laser energy, and self-guide over distances comparable to the dephasing length, even for these short-pulses ($c\tau \approx \lambda_p$). This allows the wakefield to evolve to the correct shape for the production of the monoenergetic electron bunches, as measured in the experiment.
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"abstract": "The effect of laser focusing conditions on the evolution of relativistic\nplasma waves in laser wakefield accelerators is studied both experimentally and\nwith particle-in-cell simulations. For short focal length ($w_0 \u003c \\lambda_p$)\ninteractions, beam break-up prevents stable propagation of the pulse. High\nfield gradients lead to non-localized phase injection of electrons, and thus\nbroad energy spread beams. However for long focal length geometries ($w_0 \u003e\n\\lambda_p$), a single optical filament can capture the majority of the laser\nenergy, and self-guide over distances comparable to the dephasing length, even\nfor these short-pulses ($c\\tau \\approx \\lambda_p$). This allows the wakefield\nto evolve to the correct shape for the production of the monoenergetic electron\nbunches, as measured in the experiment.",
"arxiv_id": "physics/0701186",
"authors": [
"A. G. R. Thomas",
"Z. Najmudin",
"S. P. D. Mangles",
"C. D. Murphy",
"A. E. Dangor",
"C. Kamperidis",
"K. L. Lancaster",
"W. B. Mori",
"P. A. Norreys",
"W. Rozmus",
"K. Krushelnick"
],
"categories": [
"physics.plasm-ph",
"physics.acc-ph"
],
"doi": "10.1103/PhysRevLett.98.095004",
"journal_ref": "Phys.Rev.Lett.98:095004,2007",
"title": "The Effect of Laser Focusing Conditions on Propagation and Monoenergetic Electron Production in Laser Wakefield Accelerators",
"url": "https://arxiv.org/abs/physics/0701186"
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