CORRELATION BETWEEN SOFT-X-RAY EMISSION AND DYNAMICS OF FAST CAPILLARY DISCHARGES

A capillary discharge nas driven by a fast pulse power generator 'LIMA Y-I' (3 Omega-70 ns) to investigate plasma dynamics. A two-stage pre-i onization circuit was developed to obtain uniformly preionized plasma load as the initial condition. Time-resolved radiations from the plasm a column were observed by X-ray detectors and a fast streak camera. Ex perimental results indicated that the column can implode (rapidly cont ract) stably in an initial pressure range of 200-1000 ra of argon. The reproducibility of the signal was quite good and the behavior of plas ma column was well explained by one-dimensional magnetro-hydrodynamic (1D-MHD) simulation. These results suggest that the final plasma param eters satisfy tile lasing condition for collisionally pumped Ne-like A r with a sufficient margin of stability.