Dynamics of the ultrashort laser pulse in a capillary discharge-preformed argon plasma channel

Shohei Sakai; Jun Miyazawa; Takeshi Higashiguchi; Noboru Yugami; Nadezhda Bobrova; Pavel Sasorov

doi:10.1117/12.892512

5 October 2011 Dynamics of the ultrashort laser pulse in a capillary discharge-preformed argon plasma channel

Shohei Sakai, Jun Miyazawa, Takeshi Higashiguchi, Noboru Yugami, Nadezhda Bobrova, Pavel Sasorov

Proceedings Volume 8140, X-ray Lasers and Coherent X-ray Sources: Development and Applications IX; 814012 (2011) https://doi.org/10.1117/12.892512
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

Abstract

We have observed guiding of 10¹⁶-W/cm² ultrashort laser pulses in a discharge-produced plasma channel in an argon-gas-filled 1-cm long alumina (Al₂O₃) capillary. An optimum timing of the laser pulse injection was around 150 ns for the discharge with a peak current of 200 A at the discharge time 150 ns. One-dimensional magnetrohydrodynamic (MHD) code was used to evaluate the average degree of ionization of Ar in the preformed plasma channel. In the preformed plasma the averaged ion charge state of Ar³⁺ was obtained from the observed visible emission spectra and from the MHD simulation. The spectrum of the laser pulse in the preformed by the discharge argon plasma channel was not changed and was well reproduced in the particle-in-cell (PIC) simulation.

Citation Download Citation

Shohei Sakai, Jun Miyazawa, Takeshi Higashiguchi, Noboru Yugami, Nadezhda Bobrova, and Pavel Sasorov "Dynamics of the ultrashort laser pulse in a capillary discharge-preformed argon plasma channel", Proc. SPIE 8140, X-ray Lasers and Coherent X-ray Sources: Development and Applications IX, 814012 (5 October 2011); https://doi.org/10.1117/12.892512

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