A global model of 2.45 GHz ECR ion sources for high intensity H+, H2+ and H3+ beams
| Autor: | Wenbin Wu, Kai Li, Zhiyu Guo, Jiaer Chen, Ailin Zhang, Yaoxiang Jiang, Yuan Xu, Tenghao Ma, Jingfeng Zhang, Shixiang Peng, Jiamei Wen, Tao Zhang |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Cyclotron 02 engineering and technology Plasma Electron 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Ion source Electron cyclotron resonance Surfaces Coatings and Films Ion law.invention Physics::Plasma Physics law Magnet 0103 physical sciences Atomic physics 0210 nano-technology Instrumentation Beam (structure) |
| Zdroj: | Vacuum. 182:109744 |
| ISSN: | 0042-207X |
| DOI: | 10.1016/j.vacuum.2020.109744 |
| Popis: | The 2.45 GHz electron cyclotron resonance ion source (ECRIS) is recognized as one of the most efficient devices for the production of high intensity H+, H2+ and H3+ beams. To elucidate the mechanism of electron cyclotron heated (ECH) hydrogen plasma, a global model based on the energy and particle balance equations is developed at Peking University (PKU). This model is applied to a permanent magnet ECRIS named PMECR II at PKU to study the dependences of the H+, H2+, and H3+ ion fractions of the extracted beam on the gas pressure, microwave power, wall material and chamber diameter. The calculated results obtained with the global model are in good agreement with the experimental results. Moreover, a more compact 2.45 GHz ECR ion source is designed and operated under the guidance of the model for the generation of H+, H2+ and H3+ ion dominated beams. Beams with H+, H2+ and H3+ ion fractions greater than 80% were produced under optimized gas pressure and microwave power with this new ECR source. |
| Databáze: | OpenAIRE |
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