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Recently attention was paid to produce high current high fraction DC H2+, H3+ generation with PKU (Peking University) Type Miniaturized 2.45 GHz Microwave Driven Ion Source (MMDIS) atour ion source group. A 22 mA DC H2+ ion beam with its fraction of 70% was obtained last year [1]. This data was updated to 24 mA newly. To overcome space charge effect, activation and Lorentz stripping limits within the Superconducting Ring Cyclotron and other accelerators like TRIUMF 520 MeV cyclotron, SCENT project, IsoDAR etc., H3+ becomes the key support for those high intensity proton facilities. At PKU, with the same MMDIS a 7.6 mA DC H3+ ion beam was generated later this year. Its H3+ fraction can reach up to 68.5%. This will offer practical benefits, particularly in cancer treatment and astronomy.
[1] Cui B, Peng S, Zhu J, Dong Y, Guo Z, Chen, New progress on DC H2+ beam generation: Tens of mA output and 70% fraction from a 2.45 GHz microwave driven ion source. Letter, Chin. Phys. B 34, 085203 (2025)
| Classification | MC1: New developments and status reports |
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