The ion cyclotron resonance mechanism can play a crucial role in high-power electric propulsion of space vehicles. Compared with the existing high-power thruster design such as the single-pass configuration in Variable Specific Impulse Magnetoplasma Rocket, we propose a new ion cyclotron resonance configuration that is still efficient under high radio frequency power. A single-ion acceleration theory and particle-in-cell simulations reveal the mechanism of the new configuration by making the phases of the ion and the wave match to each other for more energy gain in the ion cyclotron resonance and a raise of the energy conversion efficiency. Thus, this new configuration can have important applications not only to electric propulsion but also to ion cyclotron resonance heating in nuclear fusion.

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