Single-wire explosion experiments relevant to the initial stages of wire array z pinches
نویسندگان
چکیده
منابع مشابه
Magnetic Field Measurements in Wire-Array Z- Pinches and X Pinches
We are investigating novel techniques to obtain time-dependent magnetic field measurements in wire-array Z-pinches and X-pinches. An ideal method would be emission spectroscopy (Zeeman splitting of lines, for example, in the visible or VUV spectrum), as it would be entirely passive and non-perturbing. However, a spectroscopic method to determine the high magnetic fields present in megampere lev...
متن کاملAxial x-ray backlighting of wire-array Z-pinches using X pinches.
For the first time, a geometry has been developed to allow for an axial imaging system for wire-array Z-pinch experiments that produce high-resolution x-ray images. The new geometry required a significant redesign of the electrode hardware. Calibrated areal density measurements of the Z-pinch plasma including wire cores, coronal plasma, streaming plasma, and the precursor were obtained. The sys...
متن کاملSuppression of the ablation phase in wire array Z pinches using a tailored current prepulse.
A new wire array configuration has been used to create thin shell-like implosions in a cylindrical array. The setup introduces a ~5 kA, ~25 ns current prepulse followed by a ~140 ns current-free interval before the application of the main (~1 MA) current pulse. The prepulse volumetrically heats the wires which expand to ~1 mm diameter leaving no dense wire core and without development of instab...
متن کاملOptical Thomson scattering measurements of plasma parameters in the ablation stage of wire array Z pinches.
A Thomson scattering diagnostic has been used to measure the parameters of cylindrical wire array Z pinch plasmas during the ablation phase. The scattering operates in the collective regime (α>1) allowing spatially localized measurements of the ion or electron plasma temperatures and of the plasma bulk velocity. The ablation flow is found to accelerate towards the axis reaching peak velocities ...
متن کاملImplosion dynamics and x-ray generation in small-diameter wire-array Z pinches.
It is known from experiments that the radiated x-ray energy appears to exceed the calculated implosion kinetic energy and Spitzer resistive heating [C. Deeney, Phys. Rev. A 44, 6762 (1991)] but possible mechanisms of the enhanced x-ray production are still being discussed. Enhanced plasma heating in small-diameter wire arrays with decreased calculated kinetic energy was investigated, and a revi...
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ژورنال
عنوان ژورنال: Laser and Particle Beams
سال: 2001
ISSN: 0263-0346
DOI: 10.1017/s0263034601193109