Shun-ichi Himeno

A New Numerical Method for Asymmetrical Abel Inversion

A new asymmetrical Abel inversion is presented for application in asymmetrical data which is obtained from plasma diagnostics (for instance, interferometry or spectroscopy) on the toroidal plasma system, and in which asymmetry exists normal to the direction of observation. In this new numerical method a weight function, which was obtained by separating the integrated quantity into odd and even parts, was used for determination of the asymmetrical local value. To demonstrate the usefulness of this new method, we set up a hypothetical data set, which resulted in a valid local value.

Computer Method for New Elliptical Abel Inversion Applied to Holographic Plasma Diagnostics

A new and simple elliptical Abel inversion for calculating spatial distributions of electron density from elliptical shaped plasma is presented. In this numerical method inversion matrix elements were calculated analytically and examined using a test function. This method was applied to an end-on holographic interferogram of a θ-pinch plasma for the first time.

A Numerical Method For Holographic Optical Fiber Diagnostics

A new method of holographic interferometry and an accurate data processing for determination of refractive index profiles of optical fibers are presented in this paper.