Experimental study of the modified Paschen's law: glow discharge of Ethanol (CH3CH2OH), Methanol (CH3OH) and its mixture
DOI:
https://doi.org/10.31349/RevMexFis.68.041502Keywords:
Plasma; Paschen’s Law, breakdown; ethanol; methanolAbstract
A low-pressure ethanol and methanol discharge produced by a DC electric field was studied experimentally, analyzing the disruptive voltage between parallel electrodes with a circular geometry as function of pressure and distance according with the Paschen’s law, this states that the breakdown voltage is a function of the product of gas pressure and distance following the relationship: VB = f(pd). Detailed knowledge of the minimum breakdown voltage required to initiate the ethanol–methanol discharge will be useful to providing important information for future experiments and applications. In this experiment, a cylindrical chamber was used to generate a glow discharge of the ethanol (CH3CH2OH), methanol (CH3OH), and 50% mixture, over a pressure range of 0.07–5.00 Torr. Optical emission spectroscopy was performed in the wavelength range of 200–900 nm. The Paschen curves, measured experimentally for ethanol and methanol are presented, taking in account the coefficient obtained using the variation in Paschen’s law as a function of the distance and radius of the electrodes (d/r).
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