Plasma of capillary discharge of low pressure
1 Joint Institute for High Temperatures of RAS - 13, bldg. 2 Izhorskaya str., Moscow, 125412, Russia
2 Moscow Institute of Physics and Technology - 9, Institutskiy per., Dolgoprudny, Moscow Region, 141700, Russia
Received: 12 November 2013
Accepted: 24 January 2014
Ionization equilibrium is considered for a capillary plasma of low pressure within a scheme where a tail of the energy distribution function of electrons at energies above the atom excitation energy includes a small portion of electrons. The kinetics of a gas discharge plasma in strong fields is developed and allows one to determine the drift velocity of electrons and other parameters of a capillary plasma. The results are applied to a capillary plasma of helium and argon. The analysis leads to the optimal shape of the gas discharge chamber for the formation of a plasma torch with fast electrons.
PACS: 52.20.-j – Elementary processes in plasmas / 52.25.Dg – Plasma kinetic equations / 52.80.Tn – Other gas discharges
© EPLA, 2014