文章涉及用袖珍永磁潘宁源产生毫安级氧负离子束的实验研究。
The present work concerns in the experimental study on producing ma order of negative oxygen ions with a pocket permanent magnet Penning source.
实验中尝试使用不同的靶材料和辅助气体产生负离子，以提高负离子束的束流强度。
Different target materials and auxiliary gases were tried out in the experiment inorder to increase the beam intensity.
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