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Numerical investigation of the radiation from an argon plasma generated by using a high explosive

Ultraviolet radiation from argon plasmas that are generated by using a high explosive were numerically investigated. The dynamics of the plasma was evaluated using a one-dimensional fluid code The chemical explosion was treated as an external ion-energy source in the region of the explosive, that generated a strong shock wave in the argon plasma with a peak pressure of 0.58 GPa. The population densities in the atomic levels of Ar I and Ar II were obtained in thermal equilibrium with the electron temperature of the plasma. Next, spectral data in the 200 nm to 800 nm wavelength range from the argon plasma were evaluated using a radiation transfer code. Atomic levels and transition lines were obtained from the database provided by the National Institute of Science and Technology. The total radiation intensity was estimated to be 4.1×102 J/cm2 with a conversion efficiency of 0.11%, from the chemical energy of the explosive for the case of a 1-cm-long high explosive and an initial pressure of 2.0 atm.