STUDIES OF A PERMANENT-MAGNET TYPE SHEET PLASMA SOURCE

A rectangular formed plasma (that is, a flat plasma sheet) has been developed by making use of a new arrangement of a permanent magnet to compact the source. The new arrangement of the magnet was found to be able to generate a quasi-uniform magnetic field approximately over a rectangular space. The size of the plasma sheet was ∼8 cm wide, and ∼1 cm thick. The plasma density was on the order of 1010 ions/cm3. The permanent magnet type sheet plasma source (PERMSPS) may be applicable to develop a compact sheet plasma source appropriate for a large area hydrogen/deuterium negative ion source.