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Problems with Cusp Acceleration
We said that Cusp acceleration was continuous, given continuous injection. How then do we explain the abrupt injections observed in storms & McIlwain’s data?
The solution is topology. Abrupt changes in topology of the cusp also cause abrupt changes in output. The key is that the cusp is a POSITIVE feedback amplifier, and can be driven to the rails by appropriate input.
The plasma trapped in the cusp also contributes to the magnetic field topologymaking it stronger!