It is reported from the measurement of a negative ion beamlet emittance that the characteristic three-Gaussian components are observed in the emittance diagram. The negative ion trajectories are calculated using 3D PIC-MCC simulation in order to clarify the origin of this complicated phase space structure and underlying physical mechanism. The characteristic three-Gaussian components can be reproduced in the emittance diagram from the simulation result. It is verified that the Gaussian components are caused by the negative ions extracted from the different plasma meniscus region, that is, the central region or the region near the edges of the meniscus.
|ジャーナル||Journal of Physics: Conference Series|
|出版ステータス||Published - 2022 4月 25|
|イベント||19th International Conference on Ion Sources, ICIS 2021 - Virtual, Online|
継続期間: 2021 9月 20 → 2021 9月 24
ASJC Scopus subject areas