The forming of intensive metal ion flows in plasma beam discharge

摘要

Summary form only given. The process of dense metal ion flows withenergy in the range 10²-10³ eV in a plasma beamdischarge in the plasma break-down of disruptive distance is studied.The creation of metal vapor was possible at the expense of heating ofthe metal test piece, inserted into a primary gas discharge plasma bymeans of supplying of voltage up to 10³ V as to plasmapotential and forming the ion flows on the test piece. After attainmentof boiling temperature we can see the sudden increase at metal atomsnear the test piece and the creation of a dense metal plasma due tovapor ionization by accelerated electrons. With the occurence of a densesurface secondary plasma `pushing away' the electric field from theevaporating test piece, a double electric layer of space charge occurson the interface between these two plasmas. It forms the primary plasmaelectron flows and secondary plasma ion flows. The energy of the chargedparticles is regulated by changing the voltage on the evaporatingtest-piece. The metal ion current value and electron current value areregulated by changing the concentration of primary gas discharged plasma