Determination of the electron density in a discharge with nonmetallic liquid electrodes in atmospheric-pressure air from the absorption of microwave probe radiation |
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Authors: | Yu A Barinov V B Kaplan V V Rozhdestvenskii S M Shkol’nik |
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Affiliation: | (1) A. F. Ioffe Physicotechnical Institute, Russian Academy of Sciences, St. Petersburg |
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Abstract: | Measurements were made of the absorption of microwave power in a discharge plasma generated using tapwater electrodes in atmospheric-pressure
air in order to determine the electron density. The high-voltage discharge burned in a bulk (diffuse) form with a lower current
density than an arc discharge. This type of discharge with nonmetallic liquid electrodes is extremely promising for various
technical applications. Regimes with I=50–60 mA and voltages U=2.9–3.1 kV were studied. The measurements were made at probe radiation frequencies F=29.6 and 35.2 GHz. A two-conductor transmission line was used to localize the microwave power in the plasma. An estimate
was obtained for the average electron density in the central part of the discharge (4×1011)<n
e
<,(7×1011)cm−3. This result shows good agreement with the results of earlier probe measurements.
Pis’ma Zh. Tekh. Fiz. 24, 52–57 (December 12, 1998) |
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