Abstract
Multi-charged helium ion beam He2+ is useful for helium accelerator to obtain a higher energy with lower cost and for deuterium accelerator to avoid neutron activation during machine commissioning. An attempt to generate milliampere multi-charged helium He2+ ion beam with a 2.45 GHz electron cyclotron resonance ion source (ECRIS) was tested recently. A design using a specfic permanent magnet 2.45 GHz ECRIS (PMECRIS) source (ERCIS) is reported and the He2+ beam production ability is described. With this source, we produced a total helium beam of 40 mA at 40 kV with 180 W of net microwave power and a gas flow of less than 0.5 sccm. At steady state the He2+ beam intensity is 4.4 mA, that being the fraction of multi-charged helium ion beam is at approximately 11%.
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References
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Ren, H., Peng, S., Xu, Y. et al. Milliampere He2+ beam generator using a compact GHz ECRIS. Sci. China Phys. Mech. Astron. 56, 2016–2018 (2013). https://doi.org/10.1007/s11433-013-5281-4
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DOI: https://doi.org/10.1007/s11433-013-5281-4