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The electrothermal instability (ETI) arises whenever a current-carrying material has a resistivity that depends on temperature. When resistivity, η, increases with increasing temperature, ETI causes striations to form perpendicular to the direction of current. On pulsed-power-driven, ablating metallic loads, this process can cause sections of the target to ablate earlier than the bulk material, creating...
Experiments are underway to study the stabilizing effects of an axial magnetic field on the magneto Rayleigh-Taylor (MRT), sausage, and kink instabilities in imploding liner-plasmas at the Michigan Accelerator for Inductive Z-pinch Experiments (MAIZE) facility at the University of Michigan (UM). The liners were fabricated from ultrathin aluminum foils and had thicknesses of 400 nm and 6.55 mm diameters,...
The Recirculating Planar Magnetron (RPM) is a crossed-field device which presents numerous advantages in generating HPM. A 12-cavity, conventional-polarity, 1GHz model was designed and tested at a −300 kV, 0.3–0.5 microsecond pulselength and a 0.3 T axial magnetic field. The initial design and experimental results are discussed.
Summary form only given. Post-hole convolutes are used to combine the current from several magnetically insulated transmission lines into one anode-cathode gap. The post-hole convolute geometry produces a complex magnetic field, which can contain several magnetic nulls. Electron flow in the post-hole region can cross the anode-cathode gap, which can produce plasma and lead to further current losses...
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