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Summary form only given. We have carried out 2D and 3D simulations of dense plasma focus (DPF) devices using the MHD code ALEGRA and the electromagnetic particle-in-cell (PIC) code LSP, for the purpose of optimizing neutron production. LSP modeled the initiation phase up to 30 ns in 2D, and the resulting data was imported to ALEGRA which modeled the lift-off, rundown and pinch phases, along with thermonuclear...
We have carried out 2D and 3D simulations of a dense plasma focus device using Sandia National Laboratories' ALEGRA-HEDP code. We model the setup, rundown and pinch phases of the device and obtain predictions of fusion neutron yield as a function of machine parameters. Due to particle effects not modeled the by the code, we expect simulations to predict lower fusion neutron yields than those seen...
Summary form only given. Since the final plasma-focus (PF) characteristics depend on the primary breakdown process, the influence of the initial gas distribution on the PF formation has been investigated. Use has been made of the modified MAJA-PF facility equipped with a tubular 72-mm-diameter inner electrode and a 124-mm-diameter squirrel-cage-type outer electrode. For the gas-puffed operation the...
Summary form only given. Experiments were conducted on a device consisting of a condenser bank with 81 μF at 20-30 kV. The propagation of the plasma sheath in the rundown phase and pinch phase was studied by laser interferometry. The di/dt signal and X-ray yield were measured at the same time. The velocity of the plasma sheath in the rundown phase reached 1.0×107 cm/s at <e1>p</e1>=0...
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