Influence of atomic species on laser pulse propagation in underdense plasmas
Anno: 2011
Autori: Pathak N. C., Cecchetti C.A., Gamucci A., Giulietti A., Giulietti D., Koester P., Labate L., Levato T., Nizzoli L., Piastra F., Gizzi LA.
Affiliazione autori: ILIL, Istituto Nazionale di Ottica, CNR, Via G. Moruzzi, 1-56124-Pisa, Italy; Dipartimento di Fisica, E.Fermi University of Pisa, Pisa, Italy; INFN, Sezione di Pisa, Largo B. Pontecorvo 3, Pisa, Italy
Abstract: A 65 fs, intense (similar to 10(18) Wcm(-2)) laser pulse incident on a supersonic, laminar gas-jet was investigated via 90 Thomson Scattering and interferometry diagnostics. In order to study the effect of atomic species on laser pulse propagation, the laser interaction with different gases (Nitrogen and Argon) was monitored. In the experimental conditions, both the atomic species resulted in similar electron densities, however, early diffraction of the laser pulse was observed in Argon gas, while, stable propagation of the pulse over several Rayleigh lengths was seen in the case of Nitrogen gas target. Features of the scattering region indicate a competition between optical diffraction and intensity dependent non-linear focusing of the pulse. The observations suggest that proper choice of the target is essential within the available laser pulse parameters, as it can enhance or spoil the propagation of laser pulse in plasmas. (C) 2011 Elsevier B.V. All rights reserved.
Giornale/Rivista: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Volume: 653 (1) Da Pagina: 126 A: 129
Parole chiavi: Laser plasma interaction; Self-focussing; InterferometryDOI: 10.1016/j.nima.2011.01.005Citazioni: 1dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-09-29Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui