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We present a scheme to generate a steady-state large-volume plasma, which is uniform in both the radial and the axial directions. The weakly magnetized plasma is created by direct ionization of the background gas by low-energy electrons generated from thermionic laments, which are annularly arranged at one end of a cylindrical chamber. A bulk plasma experiment is conducted in a cylindrical stainless-steel chamber with a radius of 0.5 m and a length of 3 m. The radial and the axial pro les of the plasma density are measured in terms of di erent discharge currents by making use of a single Langmuir probe.


We present a scheme to generate a steady-state large-volume plasma, which is uniform in both the radial and the axial directions. The weakly magnetized plasma is created by direct ionization of the background gas by low-energy electrons generated from thermionic laments, which are annularly arranged at one end of a cylindrical chamber. A bulk plasma experiment is conducted in a cylindrical stainless-steel chamber with a radius of 0.5 m and a length of 3 m. The radial and the axial pro les of the plasma density are measured in terms of di erent discharge currents by making use of a single Langmuir probe.