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Understanding of neutralization phenomena is important to develop ion thrusters with higher efficiency and durability. A 2-D ion thruster with a miniature microwave neutralizer was visualized in this paper to investigate neutralization phenomena. The thruster can emit bright sheet-shaped ion beams. The neutralizer current can be controlled by the supplied microwave power. Observation of the downstream...
If a gas discharge device is connected to the circuit with inductive energy storage, the current interruption results in electrons acceleration towards the anode by the increasing field. That allows to use such a device for the purpose of electron beam generation. Studies were carried out up to the 90 kV voltage. The results of electron beam mathematical modeling under the conditions of the electric...
Mechanism of the collective acceleration of anomalous ions at the spark stage of a vacuum discharge is proposed. 2D electromagnetic particle-in-cell code was developed to study the mechanism. Computer simulation showed that ions are accelerated in the presence of a plasma cloud in the interelectrode gap, where the development of strong electron instability during the propagation of a cathode electron...
A new mechanism of the collective acceleration of ions at the spark stage of a vacuum discharge is proposed. It has been show n that this acceleration can take place in the presence of a plasma cloud in the electrode gap with strong electronic instability developing in the plasma. The appearance of accelerated ions of the interelectrode plasma is accompanied by a jump in the diode current.
A simple one-dimensional simulation code for IREB injection into neutral gas at low pressure was developed, mainly in order to study collective ion acceleration. The results obtained using various sets of parameters are in good agreement with the theory of Alexander et al /1, 2/. No "deep-well" acceleration was found. The maximum ion energy is four times the electron energy at low pressures...
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