Direct Extracting Negative Ions From PIG Ion Sources with Permanent Magent

Key words: 
• permanent magner /
• neagtive ion /
• PIG ion source /
• side extraction /
• end extraction

Abstract:  Two kinds of permanent magnet PIG ion sources are introduced, which can be used for direct extracting negative ions of the elements with larger elctron affinity, such as H, C, O, F etc. By using LaB 6 cathodes and at saturation extraction voltage, 130 μA of O - and 75 μA of F - ions were extracted from the side extraction PIG ion source, its power consumption is 110 and 280W, respectively, and for end extraction PIG ion source, 50μA of H -, 1～2mA of O - and F - ion beam have been...