Characterization of plasma in micro-EDM discharge using optical spectroscopy

Nagahanumaiah; Janakarajan Ramkumar; Nick Glumac; Shiv G. Kapoor; Richard E. Devor

doi:10.1016/j.jmapro.2009.10.002

Characterization of plasma in micro-EDM discharge using optical spectroscopy

Nagahanumaiah, Janakarajan Ramkumar, Nick Glumac, Shiv G. Kapoor, Richard E. Devor

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

Abstract

This paper presents the spectroscopic measurement of temperature and electron density in the microEDM (micro electric discharge machining: μ-EDM) process. A systematic study using L-18 orthogonal array experiments based on theTaguchi method is conducted to understand the effect of varying process parameters including voltage, current, spark gap and electrode size on the plasma characteristics. The line pair method and the Stark broadening of the H_β spectral line are used to compute plasma temperature and electron density, respectively. The spark gap and electrode size are found to have a significant influence on the plasma characteristics. The plasma produced by low-energy discharge in μ-EDM is more non-ideal, denser, and colder than the high-energy discharge plasma produced in the conventional EDM process. The interparticle distance is roughly equal to the Debye length [λ _D), resulting in more electrostatic interactions between ions.

Original language	English (US)
Pages (from-to)	82-87
Number of pages	6
Journal	Journal of Manufacturing Processes
Volume	11
Issue number	2
DOIs	https://doi.org/10.1016/j.jmapro.2009.10.002
State	Published - Jul 2009

ASJC Scopus subject areas

Strategy and Management
Management Science and Operations Research
Industrial and Manufacturing Engineering

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title = "Characterization of plasma in micro-EDM discharge using optical spectroscopy",

abstract = "This paper presents the spectroscopic measurement of temperature and electron density in the microEDM (micro electric discharge machining: μ-EDM) process. A systematic study using L-18 orthogonal array experiments based on theTaguchi method is conducted to understand the effect of varying process parameters including voltage, current, spark gap and electrode size on the plasma characteristics. The line pair method and the Stark broadening of the Hβ spectral line are used to compute plasma temperature and electron density, respectively. The spark gap and electrode size are found to have a significant influence on the plasma characteristics. The plasma produced by low-energy discharge in μ-EDM is more non-ideal, denser, and colder than the high-energy discharge plasma produced in the conventional EDM process. The interparticle distance is roughly equal to the Debye length [λ D), resulting in more electrostatic interactions between ions.",

author = "Nagahanumaiah and Janakarajan Ramkumar and Nick Glumac and Kapoor, {Shiv G.} and Devor, {Richard E.}",

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AU - Nagahanumaiah,

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AU - Glumac, Nick

AU - Kapoor, Shiv G.

AU - Devor, Richard E.

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