Generation of Field-ReversingELayers with Millisecond Lifetimes

Field-reversing electron rings, exhibiting initial axial field changes $\frac{\delta B}{B_{z0\mathrm{}}}<~170\%$, and having overall lifetimes of greater than 1300 μ sec, have been generated by injection of 2.1-MeV, 30-kA electron-beam pulses into the relativistic-electron-coil-experiment (RECE)-Christa mirror field, $B_{z0\mathrm{}}\mathrm{}\left(z\right)\mathrm{}$. These lifetimes, which are comparable with those expected from collisional diffusion of the fast electrons, constitute an improvement of more than a factor of 40 over the earlier results from RECE-Berta.