强流高电荷态Pb离子束的产生与优化研究(英文)

Study on High Intensity High Charge State Lead Ion Beam Production and Optimize

随着原子物理及表面物理研究的发展,高电荷态金属离子束的需求日益增多.近来,在中国科学院近代物理研究所14.5GHzLECR3离子源实验平台上,以炉子法产生的铅离子束作为研究对象,进行了一系列ECR离子源关键参数(如:磁场、炉子功率、掺气等)影响高电荷态铅离子束产额的实验研究,在此基础上,调整优化了LECR3离子源的状态参数,从而获得了强流高电荷态铅离子束18eμA207pb30+和6.7eμA207pb37+.

High charge state metal ion beam is quite effective and essential for new investigations on atomic physics and surface physics. Recently, The high intensity high charge state lead ion beams have been produced with IMP 14.5GHz LECR3, we investigated experimentally influences of some key parameters, such as magnetic field, electrical power on oven, gas mixing etc., on lead ion beam production. Through optimization of the ion source conditions, stable ^207pb^30＋ beam of 18eμA and ^207pb^37＋ beam of 6.7eμA have been obtained with oven method at 20kV extraction voltage.