dorsal/arxiv
View SchemaAsymmetric emission of high energy electrons in the two-dimensional hydrodynamic expansion of large xenon clusters irradiated by intense laser fields
| Authors | V. Kumarappan, M. Krishnamurthy, D. Mathur |
|---|---|
| Categories | |
| ArXiv ID | physics/0210042 |
| URL | https://arxiv.org/abs/physics/0210042 |
| DOI | 10.1103/PhysRevA.67.043204 |
Abstract
Energy spectra and angular distributions have been measured of electrons that are emitted upon disassembly of $Xe_{150000}$ following irradiation by intense (10$^{15}-10^{16}$ W cm$^{-2}$) laser pulses whose durations are varied over the 100-2200 fs range. The cluster explosion dynamics occur in the hydrodynamic regime. Electron emission is found to be unexpectedly asymmetric and exhibits a resonance when the laser pulse duration is $\sim$1 ps. These results are rationalized by extending the hydrodynamic model to also take into account the force that the light field exerts on the polarization charge that is induced on surface of the cluster. We show that the magnitude of this electrostrictive force is comparable to those of Coulombic and the hydrodynamic forces, and it exhibits resonance behavior. Contrary to earlier understanding, we find that low-energy electrons are connected to the resonance in energy absorption by the cluster. The high-energy electrons seem to be produced by a mechanism that is not so strongly influenced by the resonance.
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"abstract": "Energy spectra and angular distributions have been measured of electrons that\nare emitted upon disassembly of $Xe_{150000}$ following irradiation by intense\n(10$^{15}-10^{16}$ W cm$^{-2}$) laser pulses whose durations are varied over\nthe 100-2200 fs range. The cluster explosion dynamics occur in the hydrodynamic\nregime. Electron emission is found to be unexpectedly asymmetric and exhibits a\nresonance when the laser pulse duration is $\\sim$1 ps. These results are\nrationalized by extending the hydrodynamic model to also take into account the\nforce that the light field exerts on the polarization charge that is induced on\nsurface of the cluster. We show that the magnitude of this electrostrictive\nforce is comparable to those of Coulombic and the hydrodynamic forces, and it\nexhibits resonance behavior. Contrary to earlier understanding, we find that\nlow-energy electrons are connected to the resonance in energy absorption by the\ncluster. The high-energy electrons seem to be produced by a mechanism that is\nnot so strongly influenced by the resonance.",
"arxiv_id": "physics/0210042",
"authors": [
"V. Kumarappan",
"M. Krishnamurthy",
"D. Mathur"
],
"categories": [
"physics.atm-clus",
"physics.plasm-ph"
],
"doi": "10.1103/PhysRevA.67.043204",
"title": "Asymmetric emission of high energy electrons in the two-dimensional hydrodynamic expansion of large xenon clusters irradiated by intense laser fields",
"url": "https://arxiv.org/abs/physics/0210042"
},
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