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Interpretation and implementation of an ion sensitive probe as a plasma potential diagnostic
- Source :
- AIP
- Publication Year :
- 2011
-
Abstract
- An ion sensitive probe (ISP) is developed as a robust diagnostic for measuring plasma potentials (Φ[subscript P]) in magnetized plasmas. The ISP relies on the large difference between the ion and electron gyroradii (ρ[subscript i]/ρ[subscript e] ∼ 60) to reduce the electron collection at a collector recessed behind a separately biased wall distance ∼ ρ[subscript 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[subscript P] 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 Φ[subscript P] measured with an emissive probe over a wide range of plasma conditions in a small magnetized plasma.<br />United States. Dept. of Energy (Grant No. DE-FC02-99ER54512)
Details
- Database :
- OAIster
- Journal :
- AIP
- Notes :
- application/pdf, en_US
- Publication Type :
- Electronic Resource
- Accession number :
- edsoai.ocn796403400
- Document Type :
- Electronic Resource