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Testing Of Nickel-Chrome Alloy As A Tip Material For Multi-Tip Langmuir Probes

Author

Listed:
  • MUHAMMAD YASIN NAZ

    (Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak, Malaysia)

  • SHAZIA SHUKRULLAH

    (Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak, Malaysia)

  • ABDUL GHAFFAR

    (Department of Physics, University of Agriculture, 38040 Faisalabad, Pakistan)

  • IMRAN SHAKIR

    (Deanship of Scientific Research, College of Engineering, King Saud University, 11451 Riyadh, Saudi Arabia)

  • SAMI ULLAH

    (Department of Chemical Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak, Malaysia)

  • MUHAMMAD SAGIR

    (Department of Chemical Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak, Malaysia)

Abstract

The electrostatic probes are considered to be the most powerful and experimentally simplest technique for plasma characterization. The objective of the work was to test the nickel-chrome alloy as probe tip material for characterization of RF discharge plasmas. In order to meet the objective, a triple Langmuir probe diagnostic system and associated driving circuit was designed and tested in inductively coupled plasma (ICP) generated by a 13.56 MHz radio frequency (RF) source. Using this probe diagnostic, the electron temperature, electron number density and ion saturation current were measured as a function of input RF power and filling gas pressure. An increasing trend was noticed in electron temperature and electron number density with input power whilst a decreasing trend was evident in these parameters for increasing nitrogen gas pressure. The overall variations in electron temperature and electron number density after repeated measurements were ranging from 5% to 12% and 3% to 13%, respectively.

Suggested Citation

  • Muhammad Yasin Naz & Shazia Shukrullah & Abdul Ghaffar & Imran Shakir & Sami Ullah & Muhammad Sagir, 2014. "Testing Of Nickel-Chrome Alloy As A Tip Material For Multi-Tip Langmuir Probes," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 21(04), pages 1-7.
    • Handle: RePEc:wsi:srlxxx:v:21:y:2014:i:04:n:s0218625x14500565
    DOI: 10.1142/S0218625X14500565
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