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On diagnostics of an annular-shape radio-frequency plasma jet operating in argon at atmospheric conditions

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Abstract
One of the driving forces behind the development of cold plasma sources at atmospheric pressure is their application in the biomedical field. In this respect, radio-frequency (RF) plasma jets are of particular importance due to their possible safe operation on humans and the generation of the high amount of reactive species. For this reason, we designed an RF plasma jet in co-axial geometry with the possibility of aerosol introduction, where its characteristics were evaluated by electrical diagnostics, optical emission and laser scattering spectroscopy. The RF plasma jet operation and stability of diffuse mode were analysed based on energy balance. It was observed that alpha-mode diffuse discharge characterised by an effluent length up to 5 mm was sustained at a power density below 30 W cm(-3). The gas and rotational temperature were determined by means of spectroscopy methods and compared with the results of direct laser scattering. It was established that the gas temperature obtained from N-2 emission of transition C(3)n(u) -> B(3)n(g) (0, 2) is highly overestimated whereas the gas temperature estimated from OH transition A(2)sigma+ -> X(2)n(i) (0, 0) gave a reasonable agreement with both Rayleigh and Raman spectroscopy. Based on the Rayleigh scattering method, uniform gas temperature distribution in the discharge effluent was found at a power below 15 W with the average temperature below 340 15 K. The low gas temperature of argon plasma jets would allow use of this source in temperature-sensitive material applications including skin treatments.
Keywords
radio-frequency plasma jet, cold plasma, plasma diagnostics, laser scattering, Rayleigh spectroscopy, Raman spectroscopy, PRESSURE, RAMAN, SPECTROSCOPY

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MLA
Sremački, Ivana, et al. “On Diagnostics of an Annular-Shape Radio-Frequency Plasma Jet Operating in Argon at Atmospheric Conditions.” PLASMA SOURCES SCIENCE & TECHNOLOGY, vol. 29, no. 3, 2020, doi:10.1088/1361-6595/ab71f7.
APA
Sremački, I., Jurov, A., Modic, M., Cvelbar, U., Wang, L., Leys, C., & Nikiforov, A. (2020). On diagnostics of an annular-shape radio-frequency plasma jet operating in argon at atmospheric conditions. PLASMA SOURCES SCIENCE & TECHNOLOGY, 29(3). https://doi.org/10.1088/1361-6595/ab71f7
Chicago author-date
Sremački, Ivana, Andrea Jurov, Martina Modic, Uros Cvelbar, Lei Wang, Christophe Leys, and Anton Nikiforov. 2020. “On Diagnostics of an Annular-Shape Radio-Frequency Plasma Jet Operating in Argon at Atmospheric Conditions.” PLASMA SOURCES SCIENCE & TECHNOLOGY 29 (3). https://doi.org/10.1088/1361-6595/ab71f7.
Chicago author-date (all authors)
Sremački, Ivana, Andrea Jurov, Martina Modic, Uros Cvelbar, Lei Wang, Christophe Leys, and Anton Nikiforov. 2020. “On Diagnostics of an Annular-Shape Radio-Frequency Plasma Jet Operating in Argon at Atmospheric Conditions.” PLASMA SOURCES SCIENCE & TECHNOLOGY 29 (3). doi:10.1088/1361-6595/ab71f7.
Vancouver
1.
Sremački I, Jurov A, Modic M, Cvelbar U, Wang L, Leys C, et al. On diagnostics of an annular-shape radio-frequency plasma jet operating in argon at atmospheric conditions. PLASMA SOURCES SCIENCE & TECHNOLOGY. 2020;29(3).
IEEE
[1]
I. Sremački et al., “On diagnostics of an annular-shape radio-frequency plasma jet operating in argon at atmospheric conditions,” PLASMA SOURCES SCIENCE & TECHNOLOGY, vol. 29, no. 3, 2020.
@article{8667110,
  abstract     = {One of the driving forces behind the development of cold plasma sources at atmospheric pressure is their application in the biomedical field. In this respect, radio-frequency (RF) plasma jets are of particular importance due to their possible safe operation on humans and the generation of the high amount of reactive species. For this reason, we designed an RF plasma jet in co-axial geometry with the possibility of aerosol introduction, where its characteristics were evaluated by electrical diagnostics, optical emission and laser scattering spectroscopy. The RF plasma jet operation and stability of diffuse mode were analysed based on energy balance. It was observed that alpha-mode diffuse discharge characterised by an effluent length up to 5 mm was sustained at a power density below 30 W cm(-3). The gas and rotational temperature were determined by means of spectroscopy methods and compared with the results of direct laser scattering. It was established that the gas temperature obtained from N-2 emission of transition C(3)n(u) -> B(3)n(g) (0, 2) is highly overestimated whereas the gas temperature estimated from OH transition A(2)sigma+ -> X(2)n(i) (0, 0) gave a reasonable agreement with both Rayleigh and Raman spectroscopy. Based on the Rayleigh scattering method, uniform gas temperature distribution in the discharge effluent was found at a power below 15 W with the average temperature below 340 15 K. The low gas temperature of argon plasma jets would allow use of this source in temperature-sensitive material applications including skin treatments.},
  articleno    = {035027},
  author       = {Sremački, Ivana and Jurov, Andrea and Modic, Martina and Cvelbar, Uros and Wang, Lei and Leys, Christophe and Nikiforov, Anton},
  issn         = {0963-0252},
  journal      = {PLASMA SOURCES SCIENCE & TECHNOLOGY},
  keywords     = {radio-frequency plasma jet,cold plasma,plasma diagnostics,laser scattering,Rayleigh spectroscopy,Raman spectroscopy,PRESSURE,RAMAN,SPECTROSCOPY},
  language     = {eng},
  number       = {3},
  pages        = {14},
  title        = {On diagnostics of an annular-shape radio-frequency plasma jet operating in argon at atmospheric conditions},
  url          = {http://dx.doi.org/10.1088/1361-6595/ab71f7},
  volume       = {29},
  year         = {2020},
}

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