Speaker
Description
The ElectroMagnetic Flux Compression (EMFC) has important applications in solid-state physics (ultrahigh magnetic field physics, high pressure science), and is also likely to find applications in fusion and high-energy density researches.
In the Institute of Fluid Physics (IFP), Chinese Academy of Engineering Physics (CAEP), a medium-sized EMFC device has being developed to carry out some extreme physics researches. The device includes a 1 MJ main capacitor bank (20×40 uF, 50 kV) and a 200 kJ initial field capacitor bank (4×830 uF, 11 kV). The capacitors of the main bank are connected to a flat parallel-plate transmission line and then to the load via explosive closing switches. At present, we have finished a detailed design of the device, and a prototype has been fabricated to verify key technologies.
Meanwhile, a 2D numerical model is developed to estimate the performance of the device. In the model, the filamentary method was employed to solve the electromagnetic problem of the EMFC process, while the mechanical part was calculated by the commercial software. The numerical simulation estimated that the peak current of main bank is over 3 MA, and the peak field is about 350 T (Φ11mm) and 550 T (Φ6mm) respectively.
In addition, a novel driving coil based on a unique multi-layer solenoid of close-packed thin wires is introduced to fully avoid the ‘feed gap’ problem of the common single-turn driving coil. The analysis shows that the coil is able to drastically improve implosion stability of the liner and generate higher magnetic field under the same energy.
Due to the space limitation, the above-mentioned aspects was only shortly presented here, however the oral presentation will give more details.
