TY - JOUR
T1 - Characterization of plasma in micro-EDM discharge using optical spectroscopy
AU - Nagahanumaiah,
AU - Ramkumar, Janakarajan
AU - Glumac, Nick
AU - Kapoor, Shiv G.
AU - Devor, Richard E.
N1 - Funding Information:
The authors gratefully acknowledge the support of the BOYSCAST fellowship program under the Department of Science and Technology, Government of India, and the support of the Grayce Wicall Gauthier Chair in the Department Mechanical Science and Engineering at the University of Illinois at Urbana-Champaign during the conduct of this collaborative research. The authors thank Kevin Calzada for helping with some experimental work.
PY - 2009/7
Y1 - 2009/7
N2 - 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.
AB - 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.
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U2 - 10.1016/j.jmapro.2009.10.002
DO - 10.1016/j.jmapro.2009.10.002
M3 - Article
AN - SCOPUS:77649193410
SN - 1526-6125
VL - 11
SP - 82
EP - 87
JO - Journal of Manufacturing Processes
JF - Journal of Manufacturing Processes
IS - 2
ER -