High-speed photography and numerical study of pinch structure in PF1000 plasma-focus device

摘要

The present paper presents a high-speed photography sub-system which allows recording of frame sequence and streak images of plasma in a narrow band of the visible spectrum with high temporal and spatial resolution. Two methods are proposed for determining the distribution of the electron temperature or electron density of the plasma sheath originating in the plasma-focus phenomenon. These methods are based on theoretical considerations and processing of the results of experiments using a high-speed photography sub-system. A comparison between an experimental study of the plasma sheath structure and calculations obtained using magnetohydrodynamic (MHD) code is presented. Detailed explanations and considerations are exemplified by a number of results obtained both in experimental investigations and in numerical calculations.