Volume Produced H-, D- Ion Source for Proton Accelerator and Thermo-Nuclear Fusion Research by Sheet Plasma (2)

摘要

By increasing thicknesses of multi-aperture electrodes to extract volume produced H(-), D(-) ions from the sheet plasma, electron currents accelerated together with H(-), D(-) ions, are reduced to around 10% of the H(-), D(-) ion current with a current density of 20 to approx. 30 mA.sq cm over a large area. Accordingly, a total heat load of extraction electrodes is also reduced effectively: a power density of about 100 W/sq cm has been obtained for a H(-) ion current of 190 mA from an area of 13 sq cm with 6 mm phi x 25 apertures (54% transperency).