Skip to Main content Skip to Navigation
Journal articles

The biorthogonal decomposition as a tool for investigating fluctuations in plasmas

Abstract : 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.
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-03388333
Contributor : Thierry Dudok de Wit Connect in order to contact the contributor
Submitted on : Wednesday, October 20, 2021 - 1:17:38 PM
Last modification on : Tuesday, May 10, 2022 - 3:24:57 PM
Long-term archiving on: : Friday, January 21, 2022 - 7:48:22 PM

File

DdW_BOD_PoP1994.pdf
Files produced by the author(s)

Identifiers

Collections

Citation

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, American Institute of Physics, 1994, 1 (10), pp.3288-3300. ⟨10.1063/1.870481⟩. ⟨insu-03388333⟩

Share

Metrics

Record views

19

Files downloads

20