Thinking for a moment, Lucien asked, "As the speed and energy of particles are improved, the radius of their tract will grow accordingly. However, the capacity of the cyclotron is limited. In order to break the boundary, you will have to either expand the capacity with space-related magics, or build a particularly huge cyclotron, setting a radius of ten kilometers."
If they were not clear about the problem, Lucien intended to fool them with this excuse for now.
