Motion image reconstruction of luminous intensity distribution of plasma using light emission computed tomography

Abstract

A novel method for imaging a temporally varying distribution of the luminous intensity radiated by the plasma in a discharge tube is proposed. In this method, the projection, i.e., the set of line integrals, of the temporally varying luminous intensity's distribution is measured using a photodetector with a collimator. The temporal variation of each projection is measured synchronously with the period of the temporal variation of the discharge phenomenon. From the projections at an arbitrary time of the temporal variation, the luminous intensity distribution at the time can be reconstructed using the computed tomography (CT) algorithm. For demonstrating the efficacy of the proposed method, the reconstructed images of the time-varying luminous intensity's distribution inside a mercury discharge tube are shown. >