中国物理B ›› 2025, Vol. 34 ›› Issue (8): 85203-085203.doi: 10.1088/1674-1056/adf1ec

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New progress on DC H2+ beam generation: Tens of mA output and 70% fraction from a 2.45 GHz microwave driven ion source

Bujian Cui(崔步坚), Shixiang Peng(彭士香)†, Jianbin Zhu(朱建斌), Yicheng Dong(董宜承), Zhiyu Guo(郭之虞), and Jiaer Chen(陈佳洱)   

  1. State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
  • 收稿日期:2025-07-14 修回日期:2025-07-18 接受日期:2025-07-19 出版日期:2025-07-17 发布日期:2025-07-21
  • 通讯作者: Shixiang Peng E-mail:sxpeng@pku.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11975036). We appreciate the support from the State Key Laboratory of Nuclear Physics and Technology at PKU.

New progress on DC H2+ beam generation: Tens of mA output and 70% fraction from a 2.45 GHz microwave driven ion source

Bujian Cui(崔步坚), Shixiang Peng(彭士香)†, Jianbin Zhu(朱建斌), Yicheng Dong(董宜承), Zhiyu Guo(郭之虞), and Jiaer Chen(陈佳洱)   

  1. State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
  • Received:2025-07-14 Revised:2025-07-18 Accepted:2025-07-19 Online:2025-07-17 Published:2025-07-21
  • Contact: Shixiang Peng E-mail:sxpeng@pku.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11975036). We appreciate the support from the State Key Laboratory of Nuclear Physics and Technology at PKU.

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摘要： Recently H$_{2}^{+}$ ion beam finds widespread use in many fields, and the demand of high-current H$_{2}^{+}$ ion sources is urgent for numerous applications. However, there are currently almost no reported ion sources capable of generating a direct-current (DC) H$_{2}^{+}$ beam with tens of mA current. In previous work at Peking University (PKU), H$_{2}^{+}$ ion beams with a current of over 40 mA have been obtained in pulse mode, and a current of 16 mA was achieved in DC mode. In this paper, we report the generation of a DC H$_{2}^{+}$ ion beam with a current of 22 mA extracted from an improved miniaturized microwave driven ion source (MMDIS). Beam analysis shows that the H$_{2}^{+}$ fraction in the extracted beam is about 70%. The emittance of the mixed hydrogen beam is about 0.12 $\pi \cdot {\rm mm}\cdot {\rm mrad}$. These results provide references for the applications of H$_{2}^{+}$ beam and the design of H$_{2}^{+}$ ion source.

关键词: H$_{2}^{+}$ ion beam, direct-current (DC) operation, 2.45 GHz microwave, high current

Abstract: Recently H$_{2}^{+}$ ion beam finds widespread use in many fields, and the demand of high-current H$_{2}^{+}$ ion sources is urgent for numerous applications. However, there are currently almost no reported ion sources capable of generating a direct-current (DC) H$_{2}^{+}$ beam with tens of mA current. In previous work at Peking University (PKU), H$_{2}^{+}$ ion beams with a current of over 40 mA have been obtained in pulse mode, and a current of 16 mA was achieved in DC mode. In this paper, we report the generation of a DC H$_{2}^{+}$ ion beam with a current of 22 mA extracted from an improved miniaturized microwave driven ion source (MMDIS). Beam analysis shows that the H$_{2}^{+}$ fraction in the extracted beam is about 70%. The emittance of the mixed hydrogen beam is about 0.12 $\pi \cdot {\rm mm}\cdot {\rm mrad}$. These results provide references for the applications of H$_{2}^{+}$ beam and the design of H$_{2}^{+}$ ion source.

Key words: H$_{2}^{+}$ ion beam, direct-current (DC) operation, 2.45 GHz microwave, high current

中图分类号:  (Plasma sources)

  • 52.50.Dg
52.50.Sw (Plasma heating by microwaves; ECR, LH, collisional heating) 52.59.-f (Intense particle beams and radiation sources)