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APS » Journals » Phys. Rev. Lett. » Volume 95 » Issue 3
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Phys. Rev. Lett. 95, 034801 (2005) [4 pages]

Advection-Induced Spectrotemporal Defects in a Free-Electron Laser

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S. Bielawski and C. Szwaj
Laboratoire de Physique des Lasers, Atomes et Molécules, UMR CNRS 8523, Centre d’Études et de Recherches Lasers et Applications, FR CNRS 2416, Université des Sciences et Technologies de Lille, F-59655 Villeneuve d’Ascq Cedex, France

C. Bruni, D. Garzella, G. L. Orlandi, and M. E. Couprie
CEA/DSM/DRECAM/SPAM, Bâtiment 522, 91191 Gif-sur-Yvette, France and Laboratoire pour l’utilisation du rayonnement électromagnétique, Bâtiment 209D, Université Paris Sud, BP34, 91898 Orsay Cedex, France

Received 30 November 2004; published 14 July 2005

We evidence numerically and experimentally that advection can induce spectrotemporal defects in a system presenting a localized structure. Those defects in the spectrum are associated with the breakings induced by the drift of the localized solution. The results are based on simulations and experiments performed on the super-ACO free-electron laser. However, we show that this instability can be generalized using a real Ginzburg-Landau equation with (i) advection and (ii) a finite-size supercritical region.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.034801
DOI:
10.1103/PhysRevLett.95.034801
PACS:
41.60.Cr, 05.45.−a, 42.65.Sf
 
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