الفهرس 
Geometry of the GunOnly 14 pages are availabe for public view
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Abstract
Study of plasma dynamics in co-axial discharges is of great importance for the understanding of the behaviour of the plasma focus experiments and f o r the uses of the injectors i n the fusion reactors. The a i m of the experiment under consideration is t o study the behaviour of plasma i n a co-axial electrodes gun, plasma focus and plasma rotation. Several diagnostic techniques are used f o r these investigations, such as double electric probes, magnetic probes and miniature Rogovsk~ coils, The plasma inside the co-axial electrodes gun is obtained by discharging a 30.8 and 5 kV capacitor bank producing high discharge current which in turn passes t o the co-axial electrodes through. shielded co-axial cables. The length of the co-axial electrodes is 31.5 cm, the diameter of the outer electrode is 6,6 cm and the diameter of the inner electrode is 3.2 cm. The major investigations axe casried out with hydrogen gas at presswe of abou-t be dischaginag process of the capacitors is controlled by a spark gap tr%a%ron switche The duration of the disc-ge ed ad dwped $0 reach a negligible vahe a t %he forbfa. halft o t a l energy liber&eh i n the dischags -r_” 0,4 K, joule, The maximu i &u@ta nce is calcuha%e d experiment ally L = Q.27,uHs which is responsible f o r the decrease of %he rnejaswed umu power value The maximum resistance is calctaba%ed experimentally R = 36 mn, Theozetical cafcda%ions using one-dimension single fluid model, showed that the plasma travels from breech %o %he muzzle of the gun i n about 1,7 PSec which coincide with m the experimental work a% whioh the plasma starts t o leave the source a-’G about 1.5 psec. 1% is clear that t h e r e is a sligh* deviatiom between eqeziment al an& theoretical resuBt;s, probably due to viscosi%y and wall f nteractioara, The parameters of discharge showed that %he ma;riinm inductance takes place at a time corresponding $0 the - plasma focusing time (10 and 20.5 psec) near the gun muzzle. The energy flow shows a maximum at t -- 5, 13, 19, 24 and 34 psec., which does not represent the maximum d r i f t velocity, as the gas motion does not follow the current.