A Numerical Simulation Of X-ray Emitted By A Compact Plasma Toroid Stagnating Against A Stationary Wall

The physical process of the CT collision with the ideal static wall is investigated in the paper by resolving the RHD equations numerically without consideration of the magnetic effects. The usage of the splitting technology to analysis the energy coupling item and the heat conduction item separately makes the numerical calculation much simpler. An iterative method is also introduced to resolve the energy equation of the RHD in this paper.The influence of the Al plasma density on the time step length is presented in the paper, which shows that the larger the density is, the smaller the time step length should be. Then, a detailed discussion of the aberrance of the electron temperature due to the higher radiation temperature, which makes the time step length enormously large, is studied, and an alternative time step length is introduced which shows a good result.The physics processes, including the time dependent electron temperature, ion temperature, radiation field temperature, density, velocity and radiation power in arbitrary location, are studied through a calculation example provided in the paper. The result shows an energy conservation of the calculation with an error of no more than 1%, which means a stability of the simulation.Finally, the relationship of the primary plasma mass and velocity with the radiation yield is presented in the paper. A radiation collapse will occur when plasma velocity is smaller than certain value, which means that the radiation shrinks instantly, thus can not be used as a radiation source; otherwise, when plasma velocity is higher than the exact velocity cut, the smaller the plasma velocity and the bigger density, the more the radiation yield.