THP041
ポスターセッション② 8月7日 6-1F 13:00-15:00
Recent Progress on Highly Charged Ion Production using the RIKEN 18GHz ECRIS
Recent Progress on Highly Charged Ion Production using the RIKEN 18GHz ECRIS
○Saquilayan Glynnis Mae, 日暮 祥英, 長友 傑, 森田 泰之, 上垣外 修一（理化学研究所 仁科加速器センター 加速器基盤研究部）
○Saquilayan Glynnis Mae, Yoshihide Higurashi, Takashi Nagatomo, Yasuyuki Morita, Osamu Kamigaito（RIKEN Nishina Center Accelerator Group）
The R-18GHz Electron Cyclotron Resonance Ion Source (ECRIS) has been providing stable medium to heavy ion beams for the Radioactive Isotope Beam Facility (RIBF) at RIKEN. Highly charged ions of 40Ar, 84Kr, and 129Xe have been produced and accelerated for various nuclear physics experiments. The ion source operational parameters such as the chamber gas pressure and injected RF power have been studied as it affects the charge state distribution in the ECR plasma. To yield higher beam intensities, an empirical technique involving gas mixing has also been used. With oxygen as the mixing gas, measurements of the charge state distribution have been performed for different gas mixing ratios. Calculated mean charge state in the ECR plasma was observed to increase which has also enhanced the beam intensity for higher charge state ions. In this systematic study, the dependence on the RF power, chamber gas pressure and gas mixing ratios were investigated to understand the influence of gas mixing on the ion charge state distribution in the ECR plasma.