Production of negative ion plasmas in a Q machine
- 1 August 1994
- journal article
- Published by IOP Publishing in Plasma Sources Science and Technology
- Vol. 3 (3) , 395-399
- https://doi.org/10.1088/0963-0252/3/3/024
Abstract
A negative ion plasma is produced by introducing a small amount of SF6 gas into a low-temperature ( approximately=0.2 eV) potassium plasma produced in a Q machine. The density ratio of negative to positive ions is continuously varied in the range up to more than 0.9999, where there appears a remarkable decrease in electron shielding for potential variations, yielding a clear effect on plasma collective phenomena. By introducing fullerene (C60)particles into the Q-machine plasma, we can produce a plasma including large negative C60 ions. This ultrafine particle plasma might prove very attractive in fields of materials science.Keywords
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