Evaluation of spatial variation of nonlinear energy transfer by use of turbulence diagnostic simulator

Naohiro Kasuya, Satoru Sugita, Makoto Sasaki, Shigeru Inagaki, Masatoshi Yagi, Kimitaka Itoh, Sanae I. Itoh

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4 Citations (Scopus)

Abstract

Turbulence Diagnostic Simulator is an assembly of simulation codes to clarify the formation mechanism of turbulent structures by numerical diagnostics in magnetically confined plasmas. Global simulations are carried out using a reduced MHD model of drift-interchange mode in helical plasmas, and time series data of 3-D fluctuation fields are produced. It includes localized modes in their rational surfaces, and broad modes spread in the radial direction. Magnitudes of nonlinear couplings from the convective derivative are evaluated in the nonlinear saturated states. The radial profile shows that there exist strong mode excitation near the center, various modes and nonlinear couplings with higher m modes in the middle radius, small number of propagating modes near the edge, which contribute to the pressure profile modification. For the detection of the different features, combination of several diagnostics is necessary.

Original languageEnglish
Article number2403070
JournalPlasma and Fusion Research
Volume8
DOIs
Publication statusPublished - Jan 1 2013

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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