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Title: Non-invasive probe diagnostic method for electron temperature and ion current density in atmospheric pressure plasma jet source

The electrical probe diagnostics are very hard to be applied to atmospheric plasmas due to severe perturbation by the electrical probes. To overcome this, the probe for measuring electron temperature and ion current density is indirectly contacted with an atmospheric jet source. The plasma parameters are obtained by using floating harmonic analysis. The probe is mounted on the quartz tube that surrounds plasma. When a sinusoidal voltage is applied to a probe contacting on a quartz tube, the electrons near the sheath at dielectric tube are collected and the probe current has harmonic components due to probe sheath nonlinearity. From the relation of the harmonic currents and amplitude of the sheath voltage, the electron temperature near the wall can be obtained with collisional sheath model. The electron temperatures and ion current densities measured at the discharge region are in the ranges of 2.7–3.4 eV and 1.7–5.2 mA/cm{sup 2} at various flow rates and input powers.
Authors:
 [1] ; ; ; ;  [2] ; ;  [3]
  1. Department of Nanoscale Semiconductor Engineering, Hanyang University, Seoul 133-791 (Korea, Republic of)
  2. Department of Electrical Engineering, Hanyang University, Seoul 133-791 (Korea, Republic of)
  3. Department of Electrophysics, Kwangwoon University, 447-1, Wallgye-Dong, Nowon-Gu, Seoul 139-701 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22490096
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 8; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ATMOSPHERIC PRESSURE; CURRENT DENSITY; DIELECTRIC MATERIALS; DISTURBANCES; ELECTRIC POTENTIAL; ELECTRON TEMPERATURE; EV RANGE; FLOW RATE; NONLINEAR PROBLEMS; PLASMA DIAGNOSTICS; PLASMA JETS; PROBES; QUARTZ; WALLS