Numerical experiment of radiation self-absorption and radiation dynamics in the dense plasma focus using Lee model

摘要: Radial dynamics and plasma focus pinch were influenced in slow compression mode by optically thick due to radiation self-absorption. In this study, the role of self-absorption Mather type dense (DPF) device was investigated. The impact opacity phase behaviour towards emission explored. numerical modelling effect on dynamics, focusing, cooling, collapse influence performed. Lee Model used for simulation. model developed incorporating various energy balances including thermodynamics, kinematics, capable yielding structure trajectories. snowplow describes axial rundown slug radial pinch. Numerical simulations performed absorption within plasma. It found that a steady state with constant radius only possible at Pease–Braginskii (PB) current 1.2 1.6 MA hydrogen deuterium DPF. For lower higher values input as compared PB current, expands collapses respectively. This reduced heavier gases like Neon (Ne), Argon (Ar), Krypton (Kr) Xenon (Xe) significant amount line radiation. Ne, Ar, Kr Xe different DPF configurations more severe radiative observed without factor. Ar no self-absorption, boundary collapsed few nanoseconds 0.1 mm set cut-off model. does not attain case there factor but occurs A also both cases Xe. inferred less when taken into account. reduces loss. Thus, phenomenon during needs be considered design new device.