Interferometry of plasma focus discharge

Summary form only given. The plasma focus facilities are simple and effective sources of fast ions. At the usage of deuterium gas the fusion neurons from fusion D-D reactions are produced. The plasma produced in plasma focus facilities is convenient for interferometry diagnostics with impulse laser beam in visible wave range. We present the results of the diagnostics performed on the PF-1000 device operating in IPPLM Warsaw at the current of 1 MA in deuterium gas. The laser beam of YAG laser (second harmonic 532 nm, energy 1 J, pulse duration 1 ns) was split to 16 beams with time delay 0, 10, 30, 40, 60, 70, 90, 100, 120, 130, 150, 160, 180, 190, 210, and 220 ns. The space resolution is better than 0.1 mm. The interferometry in combination with X-ray and neutron diagnostics make possible to study correlation of a detail distribution of electron density with production of hard X-rays and neutrons. We obtained the detail evolution of pinch length and diameter, of the velocity of the current sheath, of the total number of particles in the pinch and of the spatial distribution of electron density. Especially, the evolution of the structures at the time of production of the first neutron pulse can give information about acceleration of fast deuterons. As well, the evolution of the dense structure, in which fusion processes dominated, is described.