Electron properties in an atmospheric helium plasma jet determined by Thomson scattering. Hübner, S., Sousa, J., S., Puech, V., Kroesen, G., M., & Sadeghi, N. Journal of Physics D: Applied Physics, 2014. abstract bibtex In this work we present Thomson scattering measurements on a nanosecond pulsed high voltage\ndielectric barrier discharge (DBD)-like helium plasma jet, operated in ambient air. With the low\ndetection limit offered by a triple grating spectrograph equipped with a high quantum efficiency\nintensified charge-coupled device (ICCD) camera, temporally and spatially resolved electron\ndensities and mean energies have been mapped. 7 kV peak with 250 ns width pulses at 20 kHz are\napplied to the inner cylindrical shaped electrode of a DBD. This results in a peculiar hollow\nelectron density profile in the vicinity of the jet nozzle with maximum values of n e = 5 × 10 18 m\n−3 and mean energies of up to 2.5 eV. Further downstream, the profile collapses radially and\ncontracts. A much higher electron density is found (2 × 10 19 m −3 ) while the mean energy is lower\n(0.5 eV).
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title = {Electron properties in an atmospheric helium plasma jet determined by Thomson scattering},
type = {article},
year = {2014},
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abstract = {In this work we present Thomson scattering measurements on a nanosecond pulsed high voltage\ndielectric barrier discharge (DBD)-like helium plasma jet, operated in ambient air. With the low\ndetection limit offered by a triple grating spectrograph equipped with a high quantum efficiency\nintensified charge-coupled device (ICCD) camera, temporally and spatially resolved electron\ndensities and mean energies have been mapped. 7 kV peak with 250 ns width pulses at 20 kHz are\napplied to the inner cylindrical shaped electrode of a DBD. This results in a peculiar hollow\nelectron density profile in the vicinity of the jet nozzle with maximum values of n e = 5 × 10 18 m\n−3 and mean energies of up to 2.5 eV. Further downstream, the profile collapses radially and\ncontracts. A much higher electron density is found (2 × 10 19 m −3 ) while the mean energy is lower\n(0.5 eV).},
bibtype = {article},
author = {Hübner, S. and Sousa, J. Santos and Puech, V. and Kroesen, G. M.W. and Sadeghi, N.},
journal = {Journal of Physics D: Applied Physics},
number = {43}
}
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