Leak Width in a Multicusp Field Configuration: A Revisit with a Versatile Experimental Device

Full text: The cusp configuration reduces the plasma losses to boundary by diverging plasma to the narrow regions where the magnetic field lines intersect the wall. The efficiency of multidipole cusp confinement depends on the plasma losses through cusp loss area, widely known as leak width. The multiline cusp plasma device (MPD) used electromagnets for plasma confinement and gives an opportunity to vary the magnetic field strength which controls the plasma loss area. We discuss the scaling of leak width with different magnetic field strength to understand its role in the particle confinement for such configurations. (author)