Recovery of the energy of non-neutralised ions on neutral particle injectors
Injection of high-energy neutral particles (50 to 100 keV per nucleon) is used as a means of heating the plasma in experiments in controlled thermonuclear fusion. The considerable electric power used by the neutral particle injectors makes it more difficult to obtain a net gain of electricity. The aim of this research project was to install an energy recovery system as part of an experiment on the prototype injector for Tore Supra: non-neutralised ions were electrostatically decelerated and collected at low energy on an electrode. In one experiment on the prototype injector, beams of neutral (deuterium) particles with a current strength of 20 A were accelerated to 100 kV, i.e. 2 MW power in each beam. It was shown that this system allows a power gain of around 20% at 100 keV. A theoretical study was made of neutral particle beams generated from positive ion sources. This was based essentially on calculations of the trajectory, and indicated a probable power gain of 10 to 20%.
Bibliographic Reference: Paper presented: 2ème Congrès de la Division de Plasma, Orsay (FR), Sept. 3-4, 1990
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Record Number: 199011506 / Last updated on: 1994-12-02
Original language: fr
Available languages: fr