Multicusp ion source with external rf antenna for production of protons
Rev. Sci. Instrum. 75, 355 (2004); doi:10.1063/1.1642744
Issue Date: February 2004
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Proton beams are needed in neutral-beam injection for diagnostic development of an internal magnetic field measurement. High proton fraction, low axial energy spread, current density in excess of 30 mA/cm2, and a parallel ion beam with cw operation are the requirements for the ion source/extraction system. A multicusp-type ion source with an external rf antenna was constructed at Lawrence Berkeley National Laboratory. A proton fraction of 85% and proton current density of 32 mA/cm2 were achieved at 1.8 kW of rf power. Plasma parameters were measured with a rf compensated Langmuir probe. ©2004 American Institute of Physics.
| History: | Received 3 September 2003; accepted 26 October 2003 |
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0034-6748 (print)
1089-7623 (online)
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