The biorthogonal decomposition as a tool for investigating fluctuations in plasmas - INSU - Institut national des sciences de l'Univers Accéder directement au contenu
Article Dans Une Revue Physics of Plasmas Année : 1994

The biorthogonal decomposition as a tool for investigating fluctuations in plasmas

A.‐l. Pecquet
  • Fonction : Auteur
J.‐c. Vallet
  • Fonction : Auteur
R. Lima
  • Fonction : Auteur
A.-L Pecquet
  • Fonction : Auteur
J.-C Valet
  • Fonction : Auteur

Résumé

The investigation of fluctuation phenomena in plasmas often necessitates the analysis of spatiotemporal signals. It is shown how such signals can be analyzed using the biorthogonal decomposition, which splits them into orthogonal spatial and temporal modes. The method, also referred to as the singular value decomposition, allows complex spatiotemporal patterns to be decomposed into a few coherent modes that are often easier to interpret. This is illustrated with two applications to fluctuating soft x-ray and magnetic signals, as measured in a tokamak. Emphasis is given to the physical interpretation of the biorthogonal components and their link with known physical models is discussed. It is shown how new insight can be gained in the interpretation of spatiotemporal plasma dynamics.
Fichier principal
Vignette du fichier
DdW_BOD_PoP1994.pdf (1.68 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

insu-03388333 , version 1 (20-10-2021)

Identifiants

Citer

Thierry Dudok de Wit, A.‐l. Pecquet, J.‐c. Vallet, R. Lima, A.-L Pecquet, et al.. The biorthogonal decomposition as a tool for investigating fluctuations in plasmas. Physics of Plasmas, 1994, 1 (10), pp.3288-3300. ⟨10.1063/1.870481⟩. ⟨insu-03388333⟩
35 Consultations
55 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More