A Preliminary Study Load Of The Wire Array Load Impedance Characteristics Of The Optimal Design

Z-pinch is a very useful technology to convert electrical power into x-ray radiation power, which started in 1950s. Due to instability and driving ability of facility, it has not got improved for a long time, until 1990s with the help of scientists from all around the world, the Z-pinch technology got a great breakthrough, which obtained 300TW x-ray power using 200 tungsten wire array load. Z-pinch becomes one of the most important laboratory x-ray source presently available, playing an important role in many research areas.To make better understand of Z-pinch technology, one of the key factors is to know the implosion process of the facility. In this context, we choose the most useful wire array load in experiments for research object, and combined with the Yang accelerator, make numerical simulations of the wire array load, more attentions are paid to the resistance character and influence of load parameters towards the experiment results. The details are as follow:based on the ZORK model which describing the Saturn facility, a zero dimensional load model of the wire array Z pinch is designed using PSPICE to simulate the implosion statement. Comparisons are made between the calculation results and experimental data, factors influencing the simulation results are discussed, and comparison results are analyzed to give out appropriate model parameters, also the applicability and shortage of this load model is discussed and given out.With the obtained results from the Yang accelerator, we can evaluate driving ability and make optimal load design for the PTS facility, which is still in construction, giving out the appropriate load parameters used for experiments. The details are as follow:with the obtained zero dimensional load model, we calculate different load parameters and discuss factors influencing the driving current curve. With the appropriate driving current curves chosen out, further magneto-hydrodynamic calculations are carried out and discussed to give out the best results useful for experiments.The evaluated driving ability of PTS facility is as follow:the driving current of PTS is about 10MA, and rising time of current is about 90ns(10%～90%); the optimal load parameter range could be:load radius R chosen between 8.75mm～10mm, load mass chosen between 4mg～5mg, and load length set to be 2cm constant; the estimated implosion time is about 120ns, the output radiation power is about 70TW～100TW, radiation energy is about 700kJ and the energy transforming efficiency is around 10%. Generally speaking, the driving ability of PTS is at the same level with Saturn, but a little bit better, depending on the optimal load design.In summary, work of this context make better understand of the history and load model research about Z-pinch, doing pilot study of characteristic impendence in wire array z-pinch implosion and load optimal design, giving out the driving ability evaluation and appropriate parameters for experimental load, play an important role in building facility and experimental load design.