dorsal/arxiv
View SchemaLaser Shaping and Optimization of the Laser-Plasma Interaction
| Authors | Anatoly Spitkovsky, Pisin Chen |
|---|---|
| Categories | |
| ArXiv ID | physics/0008027 |
| URL | https://arxiv.org/abs/physics/0008027 |
| DOI | 10.1063/1.1384349 |
| Journal | AIP Conf.Proc.569:183-194,2000 |
Abstract
The physics of energy transfer between the laser and the plasma in laser wakefield accelerators is studied. We find that wake excitation by arbitrary laser shapes can be parameterized using the total pulse energy and pulse depletion length. A technique for determining laser profiles that produce the required plasma excitation is developed. We show that by properly shaping the longitudinal profile of the driving laser pulse, it is possible to maximize both the transformer ratio and the wake amplitude, achieving optimal laser-plasma coupling. The corresponding family of laser pulse shapes is derived in the nonlinear regime of laser-plasma interaction. Such shapes provide theoretical upper limit on the magnitude of the wakefield and efficiency of the accelerating stage by allowing for uniform photon deceleration inside the laser pulse. We also construct realistic optimal pulse shapes that can be produced in finite-bandwidth laser systems and propose a two-pulse wake amplification scheme using the optimal solution.
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"abstract": "The physics of energy transfer between the laser and the plasma in laser\nwakefield accelerators is studied. We find that wake excitation by arbitrary\nlaser shapes can be parameterized using the total pulse energy and pulse\ndepletion length. A technique for determining laser profiles that produce the\nrequired plasma excitation is developed. We show that by properly shaping the\nlongitudinal profile of the driving laser pulse, it is possible to maximize\nboth the transformer ratio and the wake amplitude, achieving optimal\nlaser-plasma coupling. The corresponding family of laser pulse shapes is\nderived in the nonlinear regime of laser-plasma interaction. Such shapes\nprovide theoretical upper limit on the magnitude of the wakefield and\nefficiency of the accelerating stage by allowing for uniform photon\ndeceleration inside the laser pulse. We also construct realistic optimal pulse\nshapes that can be produced in finite-bandwidth laser systems and propose a\ntwo-pulse wake amplification scheme using the optimal solution.",
"arxiv_id": "physics/0008027",
"authors": [
"Anatoly Spitkovsky",
"Pisin Chen"
],
"categories": [
"physics.acc-ph",
"physics.plasm-ph"
],
"doi": "10.1063/1.1384349",
"journal_ref": "AIP Conf.Proc.569:183-194,2000",
"title": "Laser Shaping and Optimization of the Laser-Plasma Interaction",
"url": "https://arxiv.org/abs/physics/0008027"
},
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