Department of Nuclear Engineering, Faculty of Engineering, Osaka University Yamadakami, Suita-shi, Osaka, Japan
Research Reactor Institute, Kyoto University Kumatori-cho, Sennan-gun, Osaka, Japan
Abstract:
A new parameter is proposed as a statistical variable of multi-dimensional reactor noise analysis. It indicates circulation in a space of state variables, while the well-known variance σ represents the spread of distribution of fluctuations. The pair of quantities σ and are minimum necessary integral indices to characterize any power spectral density and are convenient for data retrieval. The is less sensitive to the effect of low-cut filter than σ. The analysis of experimental data by using is demonstrated and compared with the results of theoretical treatment.