Investigation the effect of anode's insert material on spatial distribution of X-ray source in plasma focus device

‎In this paper‎, ‎the effect of anode's insert material on spatial distribution of X-ray emission zone of plasma focus device was studied‎. ‎Anode's insert materials were fabricated out of aluminum‎, ‎zinc‎, ‎tin‎, ‎tungsten and lead‎. ‎For each insert material at the constant operating voltage of 21 kV‎, ‎the image of pinhole camera which monitors the surface and the top of anode was recorded at the various pressures of 0.3‎, ‎0.6‎, ‎0.9 and 1.2 mbar‎. ‎The results indicated that the X-ray emission zone above the anode surface not only includes thermal radiation of plasma‎, ‎but also depends on anode's insert materials‎. ‎This zone could be due to the passage of high energy electrons from the vapor of anode's material above the anode's surface‎.