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Author Tanışlı, Murat ♦ Şahin, Neslihan
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PLASMA PHYSICS AND FUSION TECHNOLOGY ♦ ATOMS ♦ BOLTZMANN EQUATION ♦ ELECTRON TEMPERATURE ♦ EMISSION SPECTROSCOPY ♦ ENERGY-LEVEL TRANSITIONS ♦ GLOW DISCHARGES ♦ HELIUM ♦ MHZ RANGE ♦ MOLECULES ♦ OPTICAL PROPERTIES ♦ OPTICAL SPECTROMETERS ♦ PLASMA ♦ PLASMA DIAGNOSTICS ♦ PRESSURE RANGE KILO PA ♦ RADIOWAVE RADIATION ♦ WAVELENGTHS
Abstract The optical properties for radiofrequency (RF) post-discharge of pure helium (He) with two different methods as capacitively and inductively have been presented using the modified Boltzmann method in comparison. Optical emission spectroscopy (OES) is often used in the diagnosis of laboratory plasma, such as gas discharge plasma. OES is a very useful method for calculating of the electron temperature in the plasma and the determination of different atoms and molecules. In this study, OES is applied for characterizations of capacitively and inductively RF He plasma at pressures between 0.62 and 2.2 mbar for newly reactor type. Plasmas are generated with an RF power generator at a frequency of 13.56 MHz and output powers of 100, 160, and 200 W. Spectra have been evaluated in the range 200–1200 nm by an optical spectrometer. At low pressure, the main spectral features reported are the wavelengths of the atomic He transitions at 388.87 and 728.13 nm. The atomic emission intensities showed a maximum in inductive system when the pressure is about 0.62 mbar. OES of capacitive discharge and inductive discharge is compared in detail. The transition for 587.56 nm is shown to be increased in time.
ISSN 1070664X
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-01-15
Publisher Place United States
Journal Physics of Plasmas
Volume Number 23
Issue Number 1


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