Langmuir probe data analysis including the multi-component multiply charged nature of electron cyclotron resonance ion source plasma

L. Kenéz, S. Biri, J. Karácsony, A. Valek

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Though Langmuir probes have already proved useful in the field of local plasma diagnostics, the electron cyclotron resonance (ECR) plasma, which is still poorly understood, remained an unexplored one from this point of view. To do the first step, a diagnostics setup (controlled Langmuir probe, bipolar power supply) has been built at the 14.5 GHz ATOMKI-electron cyclotron resonance ion source (ECRIS). Measurements of the cold plasma regions are reported. A modified version of the original methods for characteristics analysis, is also reported. This takes into account the complex nature of the plasma ion component. Depending on the charge state which is optimized for extraction, differences of the calculated electron densities yielded by the two compared theoretical models up to a factor of three were observed which obviously shows the necessary consideration of this effect. The presented work prepares the way for hot plasma region measurements.

Original languageEnglish
Pages (from-to)249-258
Number of pages10
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume187
Issue number2
DOIs
Publication statusPublished - Feb 2002

Fingerprint

Langmuir probes
Electron cyclotron resonance
Ion sources
electrostatic probes
electron cyclotron resonance
ion sources
Plasmas
plasma diagnostics
high temperature plasmas
cold plasmas
power supplies
Plasma Gases
Plasma diagnostics
Carrier concentration
Ions
ions

Keywords

  • ECR
  • ECRIS
  • Langmuir probe
  • Multiply charged ions
  • Plasma diagnostics

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Instrumentation
  • Surfaces and Interfaces

Cite this

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abstract = "Though Langmuir probes have already proved useful in the field of local plasma diagnostics, the electron cyclotron resonance (ECR) plasma, which is still poorly understood, remained an unexplored one from this point of view. To do the first step, a diagnostics setup (controlled Langmuir probe, bipolar power supply) has been built at the 14.5 GHz ATOMKI-electron cyclotron resonance ion source (ECRIS). Measurements of the cold plasma regions are reported. A modified version of the original methods for characteristics analysis, is also reported. This takes into account the complex nature of the plasma ion component. Depending on the charge state which is optimized for extraction, differences of the calculated electron densities yielded by the two compared theoretical models up to a factor of three were observed which obviously shows the necessary consideration of this effect. The presented work prepares the way for hot plasma region measurements.",
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AU - Biri, S.

AU - Karácsony, J.

AU - Valek, A.

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AB - Though Langmuir probes have already proved useful in the field of local plasma diagnostics, the electron cyclotron resonance (ECR) plasma, which is still poorly understood, remained an unexplored one from this point of view. To do the first step, a diagnostics setup (controlled Langmuir probe, bipolar power supply) has been built at the 14.5 GHz ATOMKI-electron cyclotron resonance ion source (ECRIS). Measurements of the cold plasma regions are reported. A modified version of the original methods for characteristics analysis, is also reported. This takes into account the complex nature of the plasma ion component. Depending on the charge state which is optimized for extraction, differences of the calculated electron densities yielded by the two compared theoretical models up to a factor of three were observed which obviously shows the necessary consideration of this effect. The presented work prepares the way for hot plasma region measurements.

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