Large current negative hydrogen ion beam production

A. Ando, K. Tsumori, Y. Oka, O. Kaneko, Y. Takeiri, E. Asano, T. Kawamoto, R. Akiyama, T. Kuroda

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


Large current negative hydrogen ions are extracted from a multicusp ion source with an extraction area of 25X44 cm2. By seeding a small amount of cesium vapor into a source chamber, the H- current is enhanced to several times larger than that in a pure hydrogen discharge, accompanied by a reduction of the electron current and the filling gas pressure. A H- current up to 16 A is obtained with a beam energy of 40 keV from 560 extraction holes of 9 mm in diameter each, where the current density is 45 mA/cm2. The H- current increases linearly with the input arc power.

Original languageEnglish
Pages (from-to)2813-2815
Number of pages3
JournalPhysics of Plasmas
Issue number9
Publication statusPublished - 1994


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