Design of Compact Table-top X-pinch Device

A dense hot X-pinch plasma,as a pointlike subnanosecond x-ray source with high brightness,is quite suitable for phase-contrast imaging including x-ray microscopy for biology and medicine.We designed a compact table-top x-pinch device including the construction,calculation and emulation.The generator consists of a Marx generator,pulse-forming coaxial water lines,switch blocks and the load section.The Marx generator is composed of four 67 nF/80 kV capacitors and two triple-electrode switching circuits with both positive and negative charging.When working,each capacitor in the Marx generator is charged with 60 kV,and discharges to PFL(pulse forming line),then to the load section through N2 spark gap.The PFL,with the output impendence of 1.5 Ω,is 84cm long corresponding to the output pulse of 50 ns.The original target was to develop a 100 kV,50 kA system with 50 ns pulse rise time in order to satisfy a load of fine wire x-pinch with a few microns.The whole apparatus is placed in a flat worktable of 1.8 m 0.8 m with four wheels and can move everywhere conveniently.