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

R. Ochoukov; D.G. Whyte; B. Lipschultz; B. Labombard; S. Wukitch

doi:10.1063/1.3483192

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

R. Ochoukov, D.G. Whyte, B. Lipschultz, B. Labombard, S. Wukitch

Physics

Research output: Contribution to journal › Article › peer-review

Abstract

An ion sensitive probe (ISP) is developed as a robust diagnostic for measuring plasma potentials () in magnetized plasmas. The ISP relies on the large difference between the ion and electron gyroradii (ρ / ρ ∼60) to reduce the electron collection at a collector recessed behind a separately biased wall distance ∼ ρ . We develop a new ISP method to measure the plasma potential that is independent of the precise position and shape of the collector. is found as the wall potential when charged current to the probe collector vanishes during the voltage sweep. The plasma potentials obtained from the ISP match measured with an emissive probe over a wide range of plasma conditions in a small magnetized plasma.

Original language	English
Journal	Review of Scientific Instruments
Volume	81
Issue number	10
DOIs	https://doi.org/10.1063/1.3483192
Publication status	Published - 1 Oct 2010

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10.1063/1.3483192

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abstract = "An ion sensitive probe (ISP) is developed as a robust diagnostic for measuring plasma potentials () in magnetized plasmas. The ISP relies on the large difference between the ion and electron gyroradii (ρ / ρ ∼60) to reduce the electron collection at a collector recessed behind a separately biased wall distance ∼ ρ . We develop a new ISP method to measure the plasma potential that is independent of the precise position and shape of the collector. is found as the wall potential when charged current to the probe collector vanishes during the voltage sweep. The plasma potentials obtained from the ISP match measured with an emissive probe over a wide range of plasma conditions in a small magnetized plasma.",

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T1 - Interpretation and implementation of an ion sensitive probe as a plasma potential diagnostic

AU - Ochoukov, R.

AU - Whyte, D.G.

AU - Lipschultz, B.

AU - Labombard, B.

AU - Wukitch, S.

PY - 2010/10/1

Y1 - 2010/10/1

N2 - An ion sensitive probe (ISP) is developed as a robust diagnostic for measuring plasma potentials () in magnetized plasmas. The ISP relies on the large difference between the ion and electron gyroradii (ρ / ρ ∼60) to reduce the electron collection at a collector recessed behind a separately biased wall distance ∼ ρ . We develop a new ISP method to measure the plasma potential that is independent of the precise position and shape of the collector. is found as the wall potential when charged current to the probe collector vanishes during the voltage sweep. The plasma potentials obtained from the ISP match measured with an emissive probe over a wide range of plasma conditions in a small magnetized plasma.

AB - An ion sensitive probe (ISP) is developed as a robust diagnostic for measuring plasma potentials () in magnetized plasmas. The ISP relies on the large difference between the ion and electron gyroradii (ρ / ρ ∼60) to reduce the electron collection at a collector recessed behind a separately biased wall distance ∼ ρ . We develop a new ISP method to measure the plasma potential that is independent of the precise position and shape of the collector. is found as the wall potential when charged current to the probe collector vanishes during the voltage sweep. The plasma potentials obtained from the ISP match measured with an emissive probe over a wide range of plasma conditions in a small magnetized plasma.

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M3 - Article

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SN - 0034-6748

VL - 81

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

IS - 10

ER -

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

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