Study on Reducing Divergence of the Beams Extracted from a PermanentMagnet Microwave Ion Source by Using Permanent Magnet Lens
QIAN Feng,XU Rong,GUO Zhiyu,SONG Zhizhong,YU Jinxiang,PENG Shixiang,YUAN Zhongxi,LU Yuanrong,ZHAO Jie
Acta Scientiarum Naturalium Universitatis Pekinensis . 2008, (1): 6 -10 .