Measurement of relative transition probabilities in Ar II

Campbell, H. D.; Barnard, Anneke

doi:10.1016/0022-4073(69)90039-9

Cited by 13 publications

(4 citation statements)

References 7 publications

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“…Assuming we have a homogeneous and optically thin plasma, the relative transition probabilities of two different lines (indicated by suffixes 1 and 2) may be determined from the following expression 12 :…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Spectral Diagnosis of Acetone Species Under Atmospheric Pressure Argon Plasma Condition

Tang¹,

Chen²,

Cheng³

et al. 2013

Asian J. Chem.

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Section: Resultsmentioning

confidence: 99%

“…And in eqn. 2, g, A, E were studied by literature [10][11][12] . A straight line of least squares fit about E/k and ln (Iλ/gA) can be achieved.…”

Section: Resultsmentioning

confidence: 99%

Spectral Diagnosis of Acetone Species Under Atmospheric Pressure Argon Plasma Condition

Tang¹,

Chen²,

Cheng³

et al. 2013

Asian J. Chem.

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Section: Principle: Qualitative and Quantitative Analysis Of Emimentioning

confidence: 99%

Spectral diagnosis of plasma jet at atmospheric pressure

Tang

Qiu

et al. 2009

2009 IEEE Pulsed Power Conference

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A new approach to surface modification of materials using dielectric barrier discharge (DBD) plasma jet at atmospheric pressure is presented in this paper. The emission spectral lines of argon plasma jet at atmospheric pressure were recorded by the grating spectrograph HR2000 and computer software. The argon plasma emission spectra, whose range is from 300nm to 1000nm, were measured at different applied voltage. Comparing to air plasma emission spectra under the same circumstance, it is shown that all of the spectral lines are attributed to neutral argon atoms. The spectral line 763.51mn and 772.42nm are chosen to estimate the electron excitation temperature. The purpose of the study is to research the relationship between the applied voltage and temperature to control the process of materials' surface modification promptly. The results show that electron excitation temperature is in the range of 0.1eV-0.5eV and it increases with increasing applied voltage. In the process of surface modification under the plasma jet, the infrared radiation thermometer was used to measure the material surface temperature under the plasma jet. The results show that the material surface temperature is in the range of 50~100 degrees centigrade and it also increases with increasing applied voltage. Because the material surface was under the plasma jet and its temperature was decided by the plasma, the material surface temperature increases with increasing the macro-temperature of plasma jet, the relationship of the surface temperature and applied voltage indicates the relationship of the macrotemperature of the plasma jet and the applied voltage approximately. The experimental results indicate that DBD plasma jet at atmospheric pressure is a new approach to improve the quality of materials' surface modification, and spectral diagnose is proved to be a kind of workable method by choosing suitable applied voltage.

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“…In order to evaluate the performance of the plasma, the excitation temperature of the plasma jet is estimated from the intensity of atomic emission lines of the jet provided the population in the levels of atom follows the Boltzmann distribution for plasma in the local thermodynamic equilibrium. The relative transition probabilities of two different lines can be expressed with the following relation [30] :…”

Section: Optical Diagnostics Of the Plasma Jetmentioning

confidence: 99%

Atmospheric Pressure Plasma Jet in Ar and O₂/Ar Mixtures: Properties and High Performance for Surface Cleaning

Jia¹,

Ren²,

Yang³

et al. 2013

Plasma Sci. Technol.

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An atmospheric pressure plasma jet generated in Ar and O2/Ar mixtures has been investigated by specially designed equipment with double power electrodes at 20∼32 kHz, and their effects on the cleaning of surfaces have been studied. Properties of the jet discharge are studied by electrical diagnostics, including the waveform of discharge voltage, discharge current and the Q-V Lissajous figures. The optical emission spectroscopy is used to measure the plasma parameters, such as the excitation temperature and the gas temperature. It is found that the consumed power and the excitation temperature increase with increase of the discharge frequency. On the other hand, at the same discharge frequency, these parameters in O2/Ar mixture plasma are found to be much larger. The effect on surface cleaning is studied from the changes in the contact angle. For Ar plasma jet, the contact angle decreases with increase of the discharge frequency. For O2/Ar mixture plasma jet, the contact angle decreases with increase of discharge frequency up to 26 kHz, however, further increase of discharge frequency does not show further decrease in the contact angle. At the same discharge frequency, the contact angle after O2/Ar mixture plasma cleaning is found to be much lower compared to the case of pure Ar. From the results of quadrupole mass-spectrum analysis, we can identify more fragment molecules of CO and H2O in the emitted gases after O2/Ar plasma jet treatment compared with Ar plasma jet treatment, which are produced by the decomposition of surface organic contaminants during the cleaning process.

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Measurement of relative transition probabilities in Ar II

Cited by 13 publications

References 7 publications

Spectral Diagnosis of Acetone Species Under Atmospheric Pressure Argon Plasma Condition

Spectral Diagnosis of Acetone Species Under Atmospheric Pressure Argon Plasma Condition

Spectral diagnosis of plasma jet at atmospheric pressure

Atmospheric Pressure Plasma Jet in Ar and O₂/Ar Mixtures: Properties and High Performance for Surface Cleaning

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Measurement of relative transition probabilities in Ar II

Cited by 13 publications

References 7 publications

Spectral Diagnosis of Acetone Species Under Atmospheric Pressure Argon Plasma Condition

Spectral Diagnosis of Acetone Species Under Atmospheric Pressure Argon Plasma Condition

Spectral diagnosis of plasma jet at atmospheric pressure

Atmospheric Pressure Plasma Jet in Ar and O2/Ar Mixtures: Properties and High Performance for Surface Cleaning

Contact Info

Product

Resources

About

Atmospheric Pressure Plasma Jet in Ar and O₂/Ar Mixtures: Properties and High Performance for Surface Cleaning