<RESEARCH REPORT>High-Power Tritium Beam Propagation

概要

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In this paper an proposal is given for using tritium beam as the energy driver of ICF in order to reduce the beam number density during propagation in comparison with the proton beam. Propagation of the charge- and current-neutralized beam or propagation of the beam without charge is investigated. The z-discharge plasma channel is employed for propagation of the charge- and current-neutralized beam. Because the extracted ion beam has a large thermal velocity component v_r due to the large geometrical divergence angle, the electromagnetic force in the z-discharge plasma channel can confine the beam in a small radius. By using an electron beam which has the same parameters with those for ion beam, the way how the charge- and current-neutralization is realized is searched here. On the other hand, it is turned out that the conditions for plasma channel is very severe to be achieved. In the case that the plasma channel is not used, a propagation method that the beam extracted from the diode is injected into a high density plasma produced by a θ-pinch dischrge. In this case, the charge neutralization will be achieved almost completely so that the electrostatic field will be negligiblly small. The required plasma conditions for beam-neutralization will be reached rather easily by the θ-pinch coil discharge in comparison with the z-discharge.
核融合科学研究所の論文