Parametric study on excitation temperature and electron temperature in low pressure plasmas

2010 ◽  
Vol 10 (6) ◽  
pp. 1456-1460 ◽  
Author(s):  
Hoyong Park ◽  
Wonho Choe
Keyword(s):  
Electron Temperature ◽  
Parametric Study ◽  
Low Pressure ◽  
Excitation Temperature

Parametric study of zirconia nanoparticle synthesis in low pressure flames

2001 ◽  
Vol 44 (8-9) ◽  
pp. 2259-2262 ◽  
Author(s):  
A Colibaba-Evulet ◽  
V Shukla ◽  
N.G Glumac ◽  
B Kear ◽  
F Cosandey
Keyword(s):  
Parametric Study ◽  
Nanoparticle Synthesis ◽  
Low Pressure ◽  
Zirconia Nanoparticle

scholarly journals Diagnostics of low-pressure capacitively coupled RF discharge argon plasma

2019 ◽  
Vol 13 (27) ◽  
pp. 76-82
Author(s):  
Kadhim A. Aadim
Keyword(s):  
Electron Temperature ◽  
Electron Density ◽  
Langmuir Probe ◽  
Gas Flow ◽  
Low Pressure ◽  
Gas Pressure ◽  
Rf Discharge ◽  
Electrode Gap ◽  
Probe Characteristic ◽  
Capacitively Coupled

Low-pressure capacitively coupled RF discharge Ar plasma has been studied using Langmuir probe. The electron temperature, electron density and Debay length were calculated under different pressures and electrode gap. In this work the RF Langmuir probe is designed using 4MHz filter as compensation circuit and I-V probe characteristic have been investigated. The pressure varied from 0.07 mbar to 0.1 mbar while electrode gap varied from 2-5 cm. The plasma was generated using power supply at 4MHz frequency with power 300 W. The flowmeter is used to control Argon gas flow in the range of 600 standard cubic centimeters per minute (sccm). The electron temperature drops slowly with pressure and it's gradually decreased when expanding the electrode gap. As the gas pressure increases, the plasma density rises slightly at low gas pressure while it drops little at higher gas pressure. The electron density decreases rapidly with expand distances between electrodes.

scholarly journals Magnetic field effect on laser-induced breakdown spectroscopy and surface modifications of germanium at various fluences

2017 ◽  
Vol 35 (1) ◽  
pp. 159-169 ◽  
Author(s):  
H. Iftikhar ◽  
S. Bashir ◽  
A. Dawood ◽  
M. Akram ◽  
A. Hayat ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Electron Temperature ◽  
Surface Modifications ◽  
Laser Induced Breakdown Spectroscopy ◽  
Excitation Temperature ◽  
Number Density ◽  
Plasma Parameters ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
The Magnetic Field

AbstractThe effect of the transverse magnetic field on laser-induced breakdown spectroscopy and surface modifications of germanium (Ge) has been investigated at various fluences. Ge targets were exposed to Nd: YAG laser pulses (1064 nm, 10 ns, 1 Hz) at different fluences ranging from 3 to 25.6 J/cm2 to generate Ge plasma under argon environment at a pressure of 50 Torr. The magnetic field of strength 0.45 Tesla perpendicular to the direction of plasma expansion was employed by using two permanent magnets. The emission spectra of laser-induced Ge plasma was detected by the laser-induced breakdown spectroscopy system. The electron temperature and number density of Ge plasma are evaluated by using the Boltzmann plot and stark broadening methods, respectively. The variations in emission intensity, electron temperature (Te), and number density (ne) of Germanium plasma are explored at various fluences, with and without employment of the magnetic field. It is observed that the magnetic field is responsible for significant enhancement of both excitation temperature and number density at all fluences. It is revealed that an excitation temperature increases from Te,max,without B = 16,190 to Te,max,with B = 20,123 K. Similarly, the two times enhancement in the electron density is observed from ne,max,without B = 2 × 1018 to ne,max,with B = 4 × 1018 cm−3. The overall enhancement in Ge plasma parameters in the presence of the magnetic field is attributed to the Joule heating effect and adiabatic compression. With increasing fluence both plasma parameters increase and achieve their maxima at a fluence of 12.8 J/cm2 and then decrease. In order to correlate the plasma parameters with surface modification, scanning electron microscope analysis of irradiated Ge was performed. Droplets and cones are formed for both cases. However, the growth of ridges and distinctness of features is more pronounced in case of the absence of the magnetic field; whereas surface structures become more diffusive in the presence of the magnetic field.

Parametric Study of a Low-Pressure Theta-Pinch Discharge in Argon for Preliminary Analytical Optimization

1989 ◽  
Vol 43 (6) ◽  
pp. 991-997 ◽  
Author(s):  
Jeffrey S. White ◽  
Gae Ho Lee ◽  
Alexander Scheeline
Keyword(s):  
Discharge Current ◽  
Parametric Study ◽  
Low Pressure ◽  
Gas Pressure ◽  
Discharge Energy ◽  
Current Waveform ◽  
Theta Pinch ◽  
Discharge Gas

The qualitative dependence of spectrochemical performance of a thetapinch discharge on a variety of experimental variables including discharge gas pressure, sample positioning, discharge energy, and discharge current waveform is reported.

Electron Temperature Evolution in a Low-Pressure Dusty RF Nitrogen-Rich Methane Plasma

2013 ◽  
Vol 41 (4) ◽  
pp. 816-821 ◽  
Author(s):  
V. Massereau-Guilbaud ◽  
I. Geraud-Grenier ◽  
J. Lagrange ◽  
H. Tawidian ◽  
M. Mikikian
Keyword(s):  
Electron Temperature ◽  
Low Pressure ◽  
Temperature Evolution
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