Structure of ionization zone in crossed-field discharge

Summary form only given, as follows. The fine structure of ionisation zone in crossed-field discharge with anode layer using cylindrical analyser with high energy and time permission has been investigated in this work. It has been discovered that depending on discharge parameters, in particularly from magnetic field value, three characteristic views of space and time distribution of ion generation velocity in anode layer of crossed-field discharge was distinguished. In the range of weak magnetic fields (400/spl divide/1000 Oe) on the energy distribution function of ions the unstationary local zone of abnormal dense ionization moving to side of high energies is observed. Motion velocity of ionization zone corresponds to velocity of electrons motion across magnetic field. This velocity is reduced according to increase of magnetic field value. In the range of middle magnetic fields (1000/spl divide/2000 Oe) several (till four) space-divided stationary zones of ionisation are observed. In these zones the generation velocity of charged particles is more than two times higher than average ionization velocity in anode layer. A space size of these zones is several Larmor radii of electron. The order of magnitude of this size coincides with cross length of ionization. In the range of strong magnetic fields (more 2000 Oe) we have observed dynamic change of energy distribution function of ions and strong modulation of discharge characteristic. In this case we could not obtain reliable pattern of fine structure of the ionization zones because time permission of energy analyser is not sufficient. The theoretical analysis performed in this work allows interpretation observed structures of energy distribution function of ions like moving and standing waves in the anode layer of crossed-field discharge.