Single-shot multi-information diagnostic target

Abstract

The invention discloses a single-shot multi-information diagnostic target. The diagnostic target is characterized in that a positive plate impacts a substrate at a high speed, and enters a sample through the substrate to conduct shock compression; the shock wave is reflected back and forth between the substrate with high shock impedance and a composite window to compress the sample multiple times so as to generate a high-temperature and high-pressure plasma and send light radiation; the light radiation enters a multi-channel radiation pyrometer and a time-resolved spectrometer through the composite window and a fiber bundle to synchronously measure the shock luminous radiation history and the time-resolved transient spectra; the interface particle velocity of the shock wave changes when the shock wave is reflected between the sample and the window interface; and the particle velocity profile is measured by a Doppler probe system. The state parameters of the sample compressed for multiple times can be determined through correlation analysis of the particle velocity profile and the shock luminous radiation history in combination with the impedance matching method. The diagnostic target has a compact structure, and can achieve the synchronous measurement of multiple state parameters of the plasma in the same single-shot experiment, such as shock wave velocity, particle velocity, pressure, temperature, density and time-resolved transient spectra.

Description

technical field [0001] The invention belongs to the technical field of high-temperature plasma state equation and spectrum research, and specifically relates to a diagnostic target with multiple information amounts in a single shot. Background technique [0002] The high-temperature plasma state equation and spectrum research of impact compression liquid and dense gas and other fluids have important application background and scientific significance in the research of inertial confinement fusion (ICF), astrophysics and high-temperature and high-pressure plasma physics. Subcompression and diagnostics of its plasma parameters strongly depend on the design of the target device. The current target device is to diagnose the shock compression state of the initial transparent fluid sample through a single technical means of the radiation pyrometer (PMT), and only measure the state equation of the fluid. Radiation pyrometers can only determine the primary compression state of the f...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the existing target device cannot determine the pressure, temperature, and density of the multiple compression state after the wavefront compressed sample loses transparency with the increase of pressure, the test range of the fluid shock final state pressure is increased, and the time-resolved transient state is realized. Synchronous measurement of spectrum, the present invention provides a diagnostic target with multiple information in a single shot, which can simultaneously test multiple parameters such as shock wave velocity, particle velocity profile, pressure, temperature, density, and time-resolved transient spectrum in plasma

Images