Is the Rotational Temperature of OH(A-X) for Discharges in and in Contact with Liquids a Good Diagnostic for Determining the Gas Temperature?

2009 ◽  
Vol 6 (11) ◽  
pp. 751-762 ◽  
Author(s):  
Peter Bruggeman ◽  
Daan C. Schram ◽  
Michael G. Kong ◽  
Christophe Leys
Keyword(s):  
Rotational Temperature ◽  
Gas Temperature

In-Situ SubStrate Temperature Measurement During a-Sin Plasma CVD from N2 Rotational Temperature

1989 ◽  
Vol 165 ◽  
Author(s):  
Shin-Ichiro Ishihara ◽  
Akira Otsuka ◽  
Seiichi Nagata
Keyword(s):  
Substrate Temperature ◽  
Rotational Temperature ◽  
Etching Rate ◽  
Thermal Conductance ◽  
Ammonium Fluoride ◽  
Nitrogen Molecule ◽  
Gas Temperature ◽  
Rf Glow Discharge ◽  
Film Characteristics

AbstractRotational temperature (Tr) of nitrogen molecule, equivalent to the gas temperature (Tg), was used for monitoring silicon nitride (SiN) surface temperature during rf glow discharge processing. SiN film characteristics such as deposition rate and etching rate for mixture of hydro-fluoric acid (HF) and ammonium fluoride : (NH4F) were dependent on Tr near the substrate. The Tr increased not only with substrate temperature setting (To) but also with gas mixing ratio of H2/(H2+N2) due to improvement of thermal conductance from heater to substrate in the process chamber.

Experimental Study on the Effect of Different Noble Gas Admixtures on the Gas Temperature of Oxygen Plasma

2005 ◽  
Vol 8 (1) ◽  
Author(s):  
K. Naoi ◽  
T. Sakamoto ◽  
H. Matsuura ◽  
H. Akatsuka
Keyword(s):  
Oxygen Plasma ◽  
Rotational Temperature ◽  
Noble Gas ◽  
Optical Emission ◽  
Radiative Transition ◽  
Band Spectrum ◽  
Gas Temperature ◽  
Inner Diameter ◽  
Discharge Pressure ◽  
Gas Admixtures

AbstractWe measured rotational temperature of oxygen plasma by optical emission spectroscopy (OES) in order to examine approximate value of its gas temperature. We generated microwave discharge oxygen plasma in a cylindrical quartz tube whose inner diameter 26 mm with its discharge pressure 0.5 - 2.0 Torr. We measured the band spectrum of radiative transition A

scholarly journals Spatially-Resolved Spectroscopic Diagnostics of a Miniature RF Atmospheric Pressure Plasma Jet in Argon Open to Ambient Air

Plasma ◽  
2020 ◽  
Vol 3 (2) ◽  
pp. 38-53
Author(s):  
Florent P. Sainct ◽  
Antoine Durocher-Jean ◽  
Reetesh Kumar Gangwar ◽  
Norma Yadira Mendoza Gonzalez ◽  
Sylvain Coulombe ◽  
...  
Keyword(s):  
Electron Temperature ◽  
Atmospheric Pressure ◽  
Rotational Temperature ◽  
Atmospheric Pressure Plasma ◽  
Optical Emission ◽  
Ambient Air ◽  
Level Population ◽  
Optical Absorption Spectroscopy ◽  
Gas Temperature ◽  
Spatially Resolved

The spatially-resolved electron temperature, rotational temperature, and number density of the two metastable Ar 1 s levels were investigated in a miniature RF Ar glow discharge jet at atmospheric pressure. The 1 s level population densities were determined from optical absorption spectroscopy (OAS) measurements assuming a Voigt profile for the plasma emission and a Gaussian profile for the lamp emission. As for the electron temperature, it was deduced from the comparison of the measured Ar 2 p i → 1 s j emission lines with those simulated using a collisional-radiative model. The Ar 1 s level population higher than 10 18 m − 3 and electron temperature around 2.5 eV were obtained close to the nozzle exit. In addition, both values decreased steadily along the discharge axis. Rotational temperatures determined from OH(A) and N 2 (C) optical emission featured a large difference with the gas temperature found from a thermocouple; a feature ascribed to the population of emitting OH and N 2 states by energy transfer reactions involving the Ar 1 s levels.

scholarly journals Rotational and gas temperatures of molecular deuterium in a hollow cathode glow discharge

2015 ◽  
Vol 38-39 (1) ◽  
pp. 11-22 ◽  
Author(s):  
G. Lj. Majstorović ◽  
N. M. Šišović
Keyword(s):  
Glow Discharge ◽  
Hollow Cathode ◽  
Low Voltage ◽  
Rotational Temperature ◽  
Energy Levels ◽  
Optical Emission ◽  
Gas Temperature ◽  
Line Intensities ◽  
Relative Line ◽  
Deuterium Molecule

Abstract We report the results of optical emission spectroscopy measurements of rotational Trot and translational (gas) temperature of deuterium molecules. The light source was a low-voltage high-pressure hollow cathode (HC) glow discharge with titanium cathode operated in deuterium. The rotational temperature of excited electronic states of D2 was determined from the intensity distribution in the rotational structure of Q-branches of the two Fulcher-α diagonal bands: [ν′ = ν″ = 2] and [ν′ =ν″ = 3]. The population of the excited energy levels, determined from relative line intensities, was used to derive the radial distributions of the temperature of the excited and the ground state of the deuterium molecule.

scholarly journals Gas Temperature Distribution in Cathode Fall Region of Grimm Glow Discharge

2018 ◽  
Vol 5 (3) ◽  
pp. 122-124 ◽  
Author(s):  
G. Majstorovic ◽  
M. Vasiljevic ◽  
N. Šišovic
Keyword(s):  
Glow Discharge ◽  
Vibrational State ◽  
Cathode Surface ◽  
Rotational Temperature ◽  
Optical Emission ◽  
Cathode Fall ◽  
Gas Temperature ◽  
Excited Vibrational State ◽  
Boltzmann Plot ◽  
Argon Mixture

Optical emission spectroscopy technique was used to measure gas temperature along the axis of cylindrical abnormal glow discharge parallel to the copper cathode surface (side-on) in hydrogen-argon mixture at low pressure. The rotational temperature of excited state of H<sub>2</sub> was determined from the rotational structure of Q branch of Fulcher-α diagonal bands using Boltzmann plot technique while the obtained ground vibrational state temperature is assumed to be equal to gas temperature. The temperature T<sub>0</sub> determined from the rotational population density distribution in an excited vibrational state can be considered as a valid estimation of the ground state temperatutre i.e. H<sub>2</sub> gas temperature.

Effects of a large mesospheric temperature enhancement on the hydroxyl rotational temperature as observed from the ground

2001 ◽  
Vol 106 (A12) ◽  
pp. 30381-30388 ◽  
Author(s):  
Stella M. L. Melo ◽  
R. P. Lowe ◽  
W. R. Pendleton ◽  
M. J. Taylor ◽  
B. Williams ◽  
...  
Keyword(s):  
Rotational Temperature ◽  
Mesospheric Temperature ◽  
Temperature Enhancement

Recovering waste energy of the combined gas turbine system using paraffin melting

2020 ◽  
Vol 14 (4) ◽  
pp. 7481-7497
Author(s):  
Yousef Najjar ◽  
Abdelrahman Irbai
Keyword(s):  
Melting Process ◽  
Payback Period ◽  
Energy Utilization ◽  
Raw Material ◽  
Heat Transfer Fluid ◽  
Layered System ◽  
Exhaust Gas ◽  
Gas Temperature ◽  
Power Cycle ◽  
Waste Energy

This work covers waste energy utilization of the combined power cycle by using it in the candle raw material (paraffin) melting process and an economic study for this process. After a partial utilization of the burned fuel energy in a real bottoming steam power generation, the exhaust gas contains 0.033 of the initially burned energy. This tail energy with about 128 ºC is partly driven in the heat exchanger of the paraffin melting system. Ansys-Fluent Software was used to study the paraffin wax melting process by using a layered system that utilizes an increased interface area between the heat transfer fluid (HTF) and the phase change material (PCM) to improve the paraffin melting process. The results indicate that using 47.35 kg/s, which is 5% of the entire exhaust gas (881.33 kg/s) from the exit of the combined power cycle, would be enough for producing 1100 tons per month, which corresponds to the production quantity by real candle's factories. Also, 63% of the LPG cost will be saved, and the payback period of the melting system is 2.4 years. Moreover, as the exhaust gas temperature increases, the consumed power and the payback period will decrease.

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