Jets as accelerators of ultrahigh-energy cosmic ray particles

The model of a cosmic jet that operates in the regimes of an MHD nozzle and a unipolar inductor is considered. It is shown that the "solid-body" rotation (according to Ferraro's law) of helical magnetic field lines should lead to an acceleration of a small fraction of the plasma particles to ultrarelativistic energies with a spectrum dq/dɛ ∼ ɛ^‑n and an index n close to its observed value of n ≈ 2.70–2.75.