The mass ablated per shot then scales as the stored electrical energy, in agreement with experiments over a wide range of operations. N2 – Design of the proper power system for an improved ablation-fed pulsed plasma microthruster PPT requires the ability to specify amplitudes, risetimes, waveforms and pulsetimes in relation to propellant properties and thrust chamber dimensions. Chittenden Experimental data from gas-filled cylindrical liner z-pinch experiments is presented. In experiments with FF-1, a mega-amp PF facility, we have found that going beyond this plateau requires elimination or extreme minimization of erosion of metals into the plasma sheath. Numerical modeling techniques, such as the MACH2 code, along with analytical modeling, are needed to provide guidance. This work may also be relevant to the study of shocks in astrophysical plasmas.

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Modeling of ablation-fed pulsed plasma thrusters

This work was supported by the U. Z-pinch research at the Chilean Nuclear Energy Commission: Gas puffs imploded onto the axis before the peak of a generator current at ns.

The timing of the shocks and their trajectories provide information on the shock launching mechanisms. Extreme degree of ionization in micro-capillary plasma columns heated by ultrafast current pulses Jorge Rocca, Jing Li, Gonzalo Avaria, Michael Grisham, Fernando Tomasel, Vyacheslav Shlyaptsev The efficient generation of dense large-scale plasma columns with very high degree of ionization and high homogeneity can enable fundamental plasma studies and a variety of promising applications.

Cuneo We present a study investigating the initiation of plasma in solid, metallic liners where the liner thickness is large compared to the pulisng skin depth. Librarians Authors Referees Media Students.

Outer, middle, and inner nozzle diameters pu,sing mm, 80 mm and 30 mm, respectively. This maximises the compression of the DT ice layer, and increases rho-r at stagnation. Measurements of modulation growth due to ablative Richtmyer-Meshkov instability using 2D laser-imprinted modulations David Martinez, V. We show how the current pulse can be shaped in order to isentropically compress the DT ice layer. Direct comparisons between the experiment and simulations enhance our understanding of these madh2 and provide predictive design capability.


APS th Annual Meeting of the APS Division of Plasma Physics – Session Index DPP12

Monday, October 29, 3: Heat transfer to the surface occurs in a thinner layer within this discharge, and provides a mass flow rate proportional to the electrical power. We present optical emission data from aluminum liners using gated imaging and streak photography, which show a dependence of onset of emission with the size of a small power-feed gap introduced at the cathode. In the thin case the K-shell yield is about twice the 14 kJ yield seen for the non-local transport and the total peak power varies by an order of magnitude.

Consequently we extend the non-local transport model to a fifth one that is multi-frequency and can thereby, for the first time, account for Doppler shifts in an R-Z time-dependent simulation of a Z-pinch.

Files over 3MB may be slow to open. This paper concentrates on the effects of cylindrical geometry on the magneto-Rayleigh-Taylor instability MRTa major concern in mwch2 magnetized liner inertial fusion concept MagLIF [1]. Shock wave timing is compared to measurements of the liner resistance and optical images of the liner’s outside surface. We observe a series of cylindrically converging shock waves driven into the gas-fill from the inside liner surface.

Modeling of ablation-fed pulsed plasma thrusters — Arizona State University

This comparison will allow for further validation of these two computer simulations in order to more accurately model the laboratory thruster. In particular, the thin approach leads to large velocity gradients at implosion not found with the non-local model. Data was collected from three different instruments: Using this beam we can directly measure the gradients and demonstrate acceleration of an injected ion beam for the first time.


The mass ablated per shot then scales as the stored electrical energy, in agreement with experiments over a wide range of operations. Understanding the mechanisms behind these high gradients is essential for optimizing the device for unique compact accelerator applications. Turchi PJMikellides P. Therefore, isentropic liner implosions are a promising technique for recreating the conditions present in the interiors of gas giants.

This result suggests that the reduced line opacity due to the inclusion of Doppler shifts could significantly affect the plasma dynamics and Kr K-shell emission. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U. Analysis of an Experimental Pulsed Plasma Accelerator. Modeling of ablation-fed pulsed plasma thrusters P.

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Abstract The purpose of this study was to gather and analyze data taken from a laboratory Pulsed Plasma Accelerator to understand its operation, and also for future comparison of the experimental data with predictions made with computer simulations based on the codes named MACH2 and GEMS. Initial 2D modulations with spatial wavelengths of 30, 70, and um were imprinted on targets by laser beams using special 2D phase plates.

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