Transient Magnetic Field Reversal with a Rotating Proton Layer

This paper reports on the transient field reversal of the applied magnetic field with a proton pulse. The 400-500-kA (peak), 50-nsec-duration, 1.7-MeV peak-energy hollow proton pulse containing about 8×${10}^{16}$ protons is generated by an inverse reflex tetrode. After passing through a magnetic cusp, the pulse propagates in a 1.5-kG uniform field $B_0$ with a self-generated magnetic field $\Delta B_z\simeq 1.25B_0$.