Empirical Similarity of Frequency Spectra of the Edge-Plasma Fluctuations in Toroidal Magnetic-Confinement Systems

M. A. Pedrosa; C. Hidalgo; B. A. Carreras; R. Balbín; I. García-Cortés; D. Newman; B. van Milligen; E. Sánchez; J. Bleuel; M. Endler; S. Davies; G. F. Matthews

doi:10.1103/PhysRevLett.82.3621

Empirical Similarity of Frequency Spectra of the Edge-Plasma Fluctuations in Toroidal Magnetic-Confinement Systems

M. A. Pedrosa, C. Hidalgo, B. A. Carreras, R. Balbín, I. García-Cortés, D. Newman, B. van Milligen, E. Sánchez, J. Bleuel, M. Endler, S. Davies, and G. F. Matthews

Phys. Rev. Lett. 82, 3621 – Published 3 May 1999

Abstract

Frequency spectra of fluctuations of the ion saturation current, floating potential, and turbulent transport measured in the plasma edge of different fusion devices (tokamaks and stellarators) have been compared. All of the spectra show the same behavior over the whole frequency range investigated, which supports universality of plasma turbulence or turbulent transport. The results obtained are an indication of edge-plasma turbulence evolving into a critical state, independent of the size and plasma characteristics of the device.

Received 15 October 1998

DOI:https://doi.org/10.1103/PhysRevLett.82.3621

Authors & Affiliations

M. A. Pedrosa¹, C. Hidalgo¹, B. A. Carreras², R. Balbín¹, I. García-Cortés¹, D. Newman², B. van Milligen¹, E. Sánchez¹, J. Bleuel³, M. Endler³, S. Davies⁴, and G. F. Matthews⁴

¹Asociación EURATOM-CIEMAT, 28040Madrid, Spain
²Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-8070
³Max-Planck-Institut für Plasmaphysik, EURATOM Association, 85740 Garching, Germany
⁴JET Joint Undertaking, Abingdon, Oxon, OX14 3EA, United Kingdom