Interpretation and implementation of an ion sensitive probe as a plasma potential diagnostic.

@article{Ochoukov2010InterpretationAI,
  title={Interpretation and implementation of an ion sensitive probe as a plasma potential diagnostic.},
  author={R. Ochoukov and Dennis G. Whyte and B Lipschultz and B. Labombard and Stephen Wukitch},
  journal={The Review of scientific instruments},
  year={2010},
  volume={81 10},
  pages={10E111}
}
An ion sensitive probe (ISP) is developed as a robust diagnostic for measuring plasma potentials (Φ(P)) in magnetized plasmas. The ISP relies on the large difference between the ion and electron gyroradii (ρ(i)/ρ(e)∼60) to reduce the electron collection at a collector recessed behind a separately biased wall distance ∼ρ(i). We develop a new ISP method to measure the plasma potential that is independent of the precise position and shape of the collector. Φ(P) is found as the wall potential when… CONTINUE READING

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FIG. 4. ͑Color online͒ ISP collector current as a function of the collector potential at four different constant wall potentials. P rf = 1600 W and h = −5 mm

FIG. 4. ͑Color online͒ ISP collector current as a function of the collector potential at four different constant wall potentials. P rf = 1600 W and h = −5 mm

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