Plasma Confinement in dc Octopole

Containment of a gun-injected hydrogen plasma in the dc octopole has been studied. The plasma parameters are $n={10}^8-{10}^{11}$ ${\mathrm{cm}}^{-3\mathrm{}}$, $T_e=1-5\mathrm{}$ eV. The confinement of 300 Bohm times is observed. The plasma losses across the magnetic field are comparable to the support loss. In high-density regimes the loss process is found to be due to classical diffusion.