PROCESS OF FORMATION OF CURRENT INHOMOGENEITY IN PLASMA Russian patent published in 1995 - IPC

FIELD: electrical physics. SUBSTANCE: process includes formation of plasma between electrodes and formation of current inhomogeneity. Potential difference V_b.d./2<V<Vb.d. is applied tp electrodes where V_b.d. is voltage of break-down of gas where plasma is formed. Laser radiation with wave length equal to wave length of transition of one of plasma components is focused into region of formation of current inhomogeneity. Power P and pulse duration t_p of laser radiation are chosen from condition P>8πhc²λ⁵ΔλQ₂₁/(2A₂₁),t_p>t_st where S is section of laser beam in point of focusing, Δλ is width of generation line of laser over wave length l, h is Planck constant, c is velocity of light, Q₂₁,A₂₁ are correspondingly coefficients of quenching and Einstein for spontaneous emission for excited transition of selected component of plasma, t_st is time of setting of stationary values of concentrations under action of laser radiation. Atoms of alkali metals with concentration N > 10¹²cm³ are selected as component of plasma. EFFECT: improved efficiency and reliability of process. 2 cl, 1 dwg, 1 tbl