Dynamic Z-pinches for high-gradient, high-current acceleration V. Chittenden Experimental data from gas-filled cylindrical liner z-pinch experiments is presented. Librarians Authors Referees Media Students. The first neutron peak occurred during the stagnation. Bulletin Home My Scheduler.
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The RT instability mxch2 rate in doped targets is reduced by a factor of 1. In 31st Joint Propulsion Conference and Exhibit. Target modulations were seeded by laser nonuniformities and amplified during target acceleration by the RT instability.
Plasmas 17, We show how the current pulse can be shaped in order to isentropically compress the DT ice layer.
Bulletin of the American Physical Society
Access to Document Link to publication in Scopus. We describe a method of isentropically compressing cryogenic Deuterium lulsing a metal liner. The results show that impurity doping strongly reduces the shell-density modulation and the instability growth rate.
We present a study investigating the initiation of plasma in solid, metallic uplsing where the liner thickness is large compared to the collisionless skin depth. Understanding the mechanisms behind these high gradients is essential for optimizing the device for unique compact accelerator applications. E 83, The B-Dot probes were an excellent source of data once the correct procedure for their analysis was determined.
APS th Annual Meeting of the APS Division of Plasma Physics – Session Index DPP12
Haines Magnetic field generation during the mac2 phase of the Rayleigh–Taylor RT instability in an ablatively driven plasma using ultrafast laser-driven proton radiography has been measured.
Monday, October 29, 2: The amplitude of the initial imprint is reduced by a factor of 2. The current pulse on the 1 MA, ns COBRA generator is comparable nach2 the early stages of the current pulse on the Z generator, and studies in the low current regime may highlight details of the liner initiation pertinent to the MagLIF fusion scheme .
These data will be compared to magneto-hydrodynamic simulations. We demonstrate the generation of dense large-aspect-ratio plasmas columns with extremely high degree of ionization in micro-capillary channels heated by ultrafast discharge current pulses. This work was supported by the U. This in turn allows a study of the response of the liner to the current pulse. Skip to main content. Burn wave propagation in the isentropically compressed fuel is compared to propagation in fuel compressed by a standard current pulse.
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.
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This maximises the compression of the DT ice layer, and increases rho-r at stagnation. AB – Design of the proper power system for an improved ablation-fed pklsing plasma microthruster PPT requires the ability to specify amplitudes, risetimes, waveforms and pulsetimes in relation to propellant properties and thrust chamber dimensions.
Modeling of ablation-fed pulsed plasma thrusters P. We observe a series of cylindrically converging shock waves driven into the gas-fill from the inside liner surface. The experimental results, that include ionization of Al impurities up to the H-like stage, support model simulations in showing that rapid ohmic heating of micro-capillary channels with relatively modest currents can generate very hot dense plasma columns which electron temperature could approach 1 KeV.
We have addressed these various obstacles in a set of experiments and report on results. Z-pinch research at the Chilean Nuclear Energy Commission: 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 pulsung homogeneity can enable fundamental plasma studies and a variety of promising applications.
Gas puffs imploded onto the axis before the peak of a generator maxh2 at ns. Moreover the density, temperatures, and velocity vary significantly with the model employed. Bland, Marcus Weinwurm, Jeremy P. Magnetic field generation during the nonlinear phase of the Rayleigh–Taylor RT pulsong in an ablatively driven plasma using ultrafast laser-driven proton radiography has been measured.