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Suanpoot, Pradoong,Gook-Hee Han,Sornsakdanuphap, Jirapong,Han Sup Uhm,Guangsup Cho,Eun Ha Choi Institute of Electrical and Electronics Engineers 2015 IEEE transactions on plasma science Vol. No.
<P>Space- and time-resolved discharge-images from a nonthermal atmospheric-pressure indirect-plasma jet have been observed using a high-speed single-frame camera to investigate the electron temperature. The propagation velocity of the indirect Ar-plasma along the plasma column has been shown to be on the order of 10<SUP>4</SUP> m/s, and that corresponds to an ion acoustic velocity on the order of 10<SUP>2</SUP> m/s. Plasma has been generated by varying input discharge voltages from 2.0 to 4.0 kV at a driving frequency of 40 kHz. Particularly, the average electron temperature in slow electron energy nonthermal atmospheric-pressure indirect-plasma jet has been found to be about 0.3 eV.</P>
Sornsakdanuphap, J.,Suanpoot, P.,Hong, Y. J.,Ghimire, B.,Cho, G.,Uhm, H. S.,Kim, D.,Kim, Y. J.,Choi, E. H. 한국물리학회 2017 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol. No.
<P>The propagation velocities (u(g) ) of argon plasma jet are obtained by intensified charge coupled device (ICCD) camera images at fixed gate width time of 5 ns. The propagation velocities in upstream and downstream regions are in the order of 10(4) - 10(5) m/s. The plasma ambipolar diffusion velocities are measured to be in the order of 10 - 10(2) m/s. Plasma jet discharges are generated by sinusoidal power supply in varying voltages from 2 to 4 kV at repetition frequency of about 40 kHz. By employing convective wave packet model, the electron temperature (T-e ) inside plasma bullet for argon non-thermal atmospheric pressure plasma jet is estimated to be about 1.18 eV. Also, the electron density (n(e) ) is found to be 8.0 x 10(14) - 2.5 x 10(15) cm(-3).</P>
Jirapong Sornsakdanuphap,Pradoong Suanpoot,홍영준,Bhagirath Ghimire,조광섭,엄환섭,김도영,김윤지,최은하 한국물리학회 2017 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.70 No.11
The propagation velocities (ug) of argon plasma jet are obtained by intensified charge coupled device (ICCD) camera images at fixed gate width time of 5 ns. The propagation velocities in upstream and downstream regions are in the order of 104 - 105 m/s. The plasma ambipolar diffusion velocities are measured to be in the order of 10 - 102 m/s. Plasma jet discharges are generated by sinusoidal power supply in varying voltages from 2 to 4 kV at repetition frequency of about 40 kHz. By employing convective wave packet model, the electron temperature (Te) inside plasma bullet for argon non-thermal atmospheric pressure plasma jet is estimated to be about 1.18 eV. Also, the electron density (ne) is found to be 8.0 × 1014 - 2.5 × 1015 cm−3.