Suppression of the pulsed regimes appearing in free-electron lasers using feedback control of an unstable stationary state.
Phys Rev E Stat Nonlin Soft Matter Phys
; 69(4 Pt 2): 045502, 2004 Apr.
Article
em En
| MEDLINE
| ID: mdl-15169061
ABSTRACT
We show that the pulsed regimes observed in free-electron lasers (FELs) can be suppressed using feedback control. By applying tiny parameter perturbations, the feedback allows to keep the systems onto a stationary state that is naturally existing in phase space, but is usually inaccessible because of its unstable nature. We test this method numerically on a master equation derived from the classical iterative model. Then we present the experimental results obtained on the super-ACO FEL. This method is in principle directly applicable to the other free-electron lasers, whose instabilities have a dynamical (deterministic) origin.
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Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2004
Tipo de documento:
Article