Investigation of high-temperature bright plasma X-ray sources produced in 5-MA X-pinch experiments

Investigation on the microstructure of as-deformed NiCr microwires using TEM

The deformed microstructures of Ni20Cr wires include amorphous GB, crystal GB, edge dislocations, and twins. Edge dislocations exist in GB and grain interiors. Twinning angles is approximately 141° and 146°, respectively.

Current redistribution and generation of kinetic energy in the stagnated Z pinch

The structure of magnetic fields was investigated in stagnated wire-array Z pinches using a Faraday rotation diagnostic at the wavelength of 266 nm. The distribution of current in the pinch and trailing material was reconstructed. A significant part of current can switch from the main pinch to the trailing plasma preheated by x-ray radiation of the pinch. Secondary implosions of trailing plasma generate kinetic energy and provide enhanced heating and radiation of plasma at stagnation. Hot spots in wire-array Z pinches also provide enhanced radiation of the Z pinch. A collapse of a single hot spot radiates 1%-3% of x-ray energy of the Z pinch with a total contribution of hot spots of 10%-30%.