Effect of atomic number and pressure on plasma pinch properties and characteristic soft x-ray emission in PF1000

In this study, the Lee code is used to compute the characteristics soft x-ray yield (Y-sxr) production for nitrogen (N-2), oxygen (O-2), neon (Ne), and argon (Ar) and bremsstrahlung radiation for hydrogen (H-2), deuterium (D-2), and helium (He) with pressure variation in PF1000 of 2.5-2.6 MA for D-2. In the calculation of characteristic soft x-ray, the corresponding temperature windows of the said gases are set into the code at which they are ionized to their H-like and He-like levels. The focus pinch parameters such as radius ratio (minimum radius of plasma pinch column/anode radius), ion density, specific heat ratio, pinch energy density, self-absorption correction factor, and maximum induced voltage are computed at the optimum pressure of each gas. The obtained pinch plasma temperature range (1.2-2.2) x 10(6) K of H-2, D-2, and He is sufficiently high for fully ionized plasmas and the resulting bremsstrahlung radiation (14 J) for He is significantly larger than for H-2 (0.26 J) and D-2 (0.62 J). The optimum Y-sxr of Ne(similar to 9314 J) at 0.51 Torr with pinch energy density (PED) (similar to 26 x 10(8) Jm(-3)) is found to be the highest whilst for Ar(similar to 7 J) at 0.019 Torr with (similar to 1.2 x 10(8) Jm(-3)) is the lowest. It is found that the radius ratio (similar to 0.05) of Ne is 3-fold smaller than that (similar to 0.16) in Ar. This enhancement of compression in pinch of Ne increases the ion density significantly by a factor of 253 than in Ar gas. Thus, the results show a strong correlation of plasma pinch properties with Y-sxr for various gases.