Plasma Potential Measurements Using an Ion Beam Probe

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Abstract
The space potential of the plasma contained in the DCX‐1 has been investigated using a beam of lithium ions. The ions were accelerated through a variable potential from a thermionic source and directed toward the plasma. The beam energy at which the transmission became significant was defined as the plasma space potential. The potentials obtained in this way have shown an increase with plasma density but have only a weak dependence on the background gas pressure.

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