A PLASMA BOX USING MAGNETIC MULTIPOLE CONFINEMENT

摘要

A plasma box using alternating magnetic multipole confinement is described. With disk shaped magnets a good confinement is achieved, the plasma lifetime being of the order of 200 us. Consequently, a very low electron emission cur¬rent (200 mA, heating power 250 VA) is required to maintain densities up to 2 x 109 cm -3 in Argon, with an electron temperature of 2,5 eV and an ion tem¬perature of 0,8 eV. The temperature ratio may be changed with a Maxwell demon between 2.0 and 5.3.