Observation of Axial and Radial Variation of x-ray Radiation Process in Gas-Puff and Wire-Array Implosions

Summary form only given. A sensitive time-resolved one-dimensional X-ray imaging system with linear energy response to 100 eV-2 keV X-rays is developed and applied in Z-Pinch experiments to investigate axial or radial variation characteristics of time dependent X-ray radiation with spatial resolution of 0.1 mm-0.4 mm and temporal resolution of 3 ns. In gas-puff experiment on Qiang-Guang-1 facility, zipper effect investigation is demonstrated and the obtained zipper velocity is typically 5 times 10 cm/s. Zipper-like effect in conical wire-array implosion is also observed. In cylindrical wire-array implosions, observations suggest that X-ray radiation process is basically not simultaneous along the axis of wire-array. Experimental results indicate a much better simultaneousness and uniformity of axial distribution of X-ray radiation process in nested wire-array implosions than in single wire-array implosions, which provides an interpretation of the radiation power increase observed in nested wire-array implosions. Results of radial variation diagnostics of X-ray radiation process suggest similar imploding velocity to that suggested by laser probing multi-frame shadowgraphs.