Negative ion source for the tandem accelerator

Search for anomalously heavy hydrogen in deep sea water at 4000 m

“…The experiment was performed with the 1.5-MV tandem Van de Graaff [19] accelerator of Konan University. 1231 @ 1993 The American Physical Society depth of 4000 m near Japan was distilled into fresh water.…”

“…The generated hydrogen gas was collected into a glass bottle of 2.4 1. The hydrogen gas was fed into a Duoplasmatron ion source [19]. The extracted negative ions were injected into the Van de Graaff accelerator through an einzel lens and a pair of electrostatic deflectors.…”