dorsal/arxiv
View SchemaPlasma wake inhibition at the collision of two laser pulses in an underdense plasma
| Authors | C. Rechatin, J. Faure, A. Lifschitz, V. Malka, E. Lefebvre |
|---|---|
| Categories | |
| ArXiv ID | physics/0703047 |
| URL | https://arxiv.org/abs/physics/0703047 |
| DOI | 10.1063/1.2741387 |
Abstract
An electron injector concept for laser-plasma accelerator was developed in ref [1] and [2] ; it relies on the use of counter-propagating ultrashort laser pulses. In [2], the scheme is as follows: the pump laser pulse generates a large amplitude laser wakefield (plasma wave). The counter-propagating injection pulse interferes with the pump laser pulse to generate a beatwave pattern. The ponderomotive force of the beatwave is able to inject plasma electrons into the wakefield. We have studied this injection scheme using 1D Particle in Cell (PIC) simulations. The simulations reveal phenomena and important physical processes that were not taken into account in previous models. In particular, at the collision of the laser pulses, most plasma electrons are trapped in the beatwave pattern and cannot contribute to the collective oscillation supporting the plasma wave. At this point, the fluid approximation fails and the plasma wake is strongly inhibited. Consequently, the injected charge is reduced by one order of magnitude compared to the predictions from previous models.
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"date_created": "2026-03-02T18:01:17.762000Z",
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"abstract": "An electron injector concept for laser-plasma accelerator was developed in\nref [1] and [2] ; it relies on the use of counter-propagating ultrashort laser\npulses. In [2], the scheme is as follows: the pump laser pulse generates a\nlarge amplitude laser wakefield (plasma wave). The counter-propagating\ninjection pulse interferes with the pump laser pulse to generate a beatwave\npattern. The ponderomotive force of the beatwave is able to inject plasma\nelectrons into the wakefield. We have studied this injection scheme using 1D\nParticle in Cell (PIC) simulations. The simulations reveal phenomena and\nimportant physical processes that were not taken into account in previous\nmodels. In particular, at the collision of the laser pulses, most plasma\nelectrons are trapped in the beatwave pattern and cannot contribute to the\ncollective oscillation supporting the plasma wave. At this point, the fluid\napproximation fails and the plasma wake is strongly inhibited. Consequently,\nthe injected charge is reduced by one order of magnitude compared to the\npredictions from previous models.",
"arxiv_id": "physics/0703047",
"authors": [
"C. Rechatin",
"J. Faure",
"A. Lifschitz",
"V. Malka",
"E. Lefebvre"
],
"categories": [
"physics.plasm-ph",
"physics.acc-ph"
],
"doi": "10.1063/1.2741387",
"title": "Plasma wake inhibition at the collision of two laser pulses in an underdense plasma",
"url": "https://arxiv.org/abs/physics/0703047"
},
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