dorsal/arxiv
View SchemaStudy of Coherent and Incoherent Plasma Emissions: Role of Plasma Wave Excitation and Breaking
| Authors | Arvinder S. Sandhu, G. Ravindra Kumar, S. Sengupta, A. Das, P. K. Kaw |
|---|---|
| Categories | |
| ArXiv ID | physics/0306197 |
| URL | https://arxiv.org/abs/physics/0306197 |
Abstract
Here we experimentally map the dynamics of electron plasma waves in laser solid interaction. We do time resolved measurements of second harmonic and hard X-ray generation from interaction of intense ($10^{16} W cm^{-2}$, 100 fs, 800nm) laser with a pre-plasma generated on a solid surface. The parameter space explored in this time resolved study includes variation of scale length, laser polarization and laser intensity in conjunction. These measurements done together brings novel features of strongly driven electron plasma wave behavior, which have not been explored experimentally so far. We model the results in terms of Resonance Absorption and Wave-Breaking mechanisms. The Harmonic and X-ray emission show contrasting behaviour, which indicates pitfalls in trying to increase harmonic efficiencies by brute force. However by simple adjustments, we observe that hard X-rays can be enhanced or controlled upto two orders of magnitude and second harmonic upto one order of magnitude under optimum conditions. These results should help us understand the governing mechanisms for short wavelength generation and fast particle generation to develop more efficient sources for application purposes.
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"date_created": "2026-03-02T18:00:46.659000Z",
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"abstract": "Here we experimentally map the dynamics of electron plasma waves in laser\nsolid interaction. We do time resolved measurements of second harmonic and hard\nX-ray generation from interaction of intense ($10^{16} W cm^{-2}$, 100 fs,\n800nm) laser with a pre-plasma generated on a solid surface. The parameter\nspace explored in this time resolved study includes variation of scale length,\nlaser polarization and laser intensity in conjunction. These measurements done\ntogether brings novel features of strongly driven electron plasma wave\nbehavior, which have not been explored experimentally so far. We model the\nresults in terms of Resonance Absorption and Wave-Breaking mechanisms. The\nHarmonic and X-ray emission show contrasting behaviour, which indicates\npitfalls in trying to increase harmonic efficiencies by brute force. However by\nsimple adjustments, we observe that hard X-rays can be enhanced or controlled\nupto two orders of magnitude and second harmonic upto one order of magnitude\nunder optimum conditions. These results should help us understand the governing\nmechanisms for short wavelength generation and fast particle generation to\ndevelop more efficient sources for application purposes.",
"arxiv_id": "physics/0306197",
"authors": [
"Arvinder S. Sandhu",
"G. Ravindra Kumar",
"S. Sengupta",
"A. Das",
"P. K. Kaw"
],
"categories": [
"physics.plasm-ph",
"physics.atom-ph"
],
"title": "Study of Coherent and Incoherent Plasma Emissions: Role of Plasma Wave Excitation and Breaking",
"url": "https://arxiv.org/abs/physics/0306197"
},
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