Application of Orthogonal Wavelet Decomposition to Plasma Fluctuation Study
Leonid G. Bruskin, A. Mase, Yasuyuki Yagi Yasuyuki Yagi, T. Tamano · Japanese Journal of Applied Physics · 1999
Multi-scale analysis of plasma fluctuations in fusion devices is performed using wavelet decomposition over the orthogonal compactly supported basis of wavelets. The discrete wavelet analysis allowed us to monitor separately the turbulence properties in different frequency bands during the RF heating on the tandem mirror GAMMA 10 and discrete event on the reversed-field pinch TPE-1RM20 fusion devices. Orthogonal discrete wavelet transform can be considered to be complementary to Fourier and continuous wavelet transforms, better suited for the study of wide-spectrum transitional events.