H− measurement in the magnetically filtered region of the large negative ion source

摘要: H− ion density in the extraction region of a volume-production-type source is measured, using photodetachment method, and directly compared to beam extracted from order understand effective production ions. It observed that there qualitative similarity between current, as expected. Characteristics under two values magnetic strength are study effect filter field. was found weaker field 750 G cm not sufficient for since high energy electrons can come into across