Self-guiding of 100TW femtosecond laser pulses in centimeter-scale underdense plasma
An experiment for studying laser self-guiding has been carried out for the high power ultrashort pulse laser interaction with an underdense plasma slab. Formation of an extremely long plasma channel and its bending are observed when the laser pulse power is much higher than the critical power for re...
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Veröffentlicht in: | Physics of plasmas 2007-04, Vol.14 (4) |
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Hauptverfasser: | , , , , , , , , , , , , , , , , , , , |
Format: | Artikel |
Sprache: | eng ; jpn |
Online-Zugang: | Volltext |
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Zusammenfassung: | An experiment for studying laser self-guiding has been carried out for the high power ultrashort pulse laser interaction with an underdense plasma slab. Formation of an extremely long plasma channel and its bending are observed when the laser pulse power is much higher than the critical power for relativistic self-focusing. The long self-guiding channel formation is accompanied by electron acceleration with a low transverse emittance and high electric current. Particle-in-cell simulations show that laser bending occurs when the accelerated electrons overtake the laser pulse and modify the refractive index in the region in front of the laser pulse. |
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ISSN: | 1070-664X 1089-7674 |
DOI: | 10.1063/1.2720374 |