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Electron Temperature and Density Measurement of Cylindrical Parallel MCS Discharge Plasma in Atmosphericpressure

We propose a cylindrical parallel microhollow cathode sustained (MCS) discharge plasma as a new large-area plasma source at atmospheric pressure. We measured the electron temperature and the density of this plasma source by using a Langmuir probe method and spectroscopy. The electron temperature at r=R/2 was measured to be 0.18 eV by using the Boltzmann plot method under the conditions that the inner radius of cylinder was R = 6.3 mm; MHCD supply voltage, –600 V at 50μs and 1 kHz; MHCD current, 10 mA for each electrode; the voltage of the third electrode, 1.5 kV; and pressure, 10 kPa. Furthermore, this temperature remained approximately constant irrespective of the pressure and the MHCD current.