4.応用 : 4.2負イオンの核融合への応用 : 負イオンを見直そう(<特集>負イオン特集)

概要

論文の詳細を見る
Negative ions in the nuclear fusion research draw attention because of their good efficiency to create high energy neutral beams that are required for heating and diagnostics. Examples of using neutral beams are, neutral beam injection (NBI) heating that is one of the most successful and reliable plasma heating methods, and charge exchange recombination spectroscopy (CXRS) using intense neutral beams, which is a powerful tool for ion diagnostics. Applying these techniques to a reactor relevant large experimental device needs high energy, and conventional positive ion systems become useless due to their low neutralization efficiency. However, a large current H^-/D^- source has been developed recently, and high power negative-ion-based neutral beam systems have come true. For some diagnostics, other species than hydrogen are required. An example is a heavy ion beam probe (HIBP) which uses Au^- to measures the electrostatic potential in the plasma. In this case, using negative ions have advantages to expect high yield for ions with negative charge, and to use a tandem acceleration system by converting Au^- to Au^+ at the maximum potential.
社団法人プラズマ・核融合学会の論文
1996-11-25