Measurements of electron density and electron temperature of arc discharge plasmas containing metallic vapors using laser thomson scattering

Kentaro Tomita, Shinya Yoshitake, Kiichiro Uchino, Daigo Takenaka, Hiroaki Toda, Masayuki Hikita, Katsumi Suzuki

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Laser Thomson scattering (LTS) has been applied to arc discharges generated in the atmospheric air to measure electron density (n e ) and electron temperature (T e ). As electrode materials, tungsten and tungsten-copper (30%) were used. The electrode gap was 0.8 mm and its diameter was 1 mm. The applied voltage was 6 kV, the peak current was 600 A and the decay time of the voltage and the current was 25 μs. Spatiotemporal evolutions of n e and T e were measured at 10 μs, 30 μs and 50 μs after the discharge initiation. At these times, obtained values of n e and T e were estimated to be in the ranges of (0.8 -2.0)×10 23 m -3 and 1.0 -2.2 eV, respectively. These values were consistent with those evaluated from Saha's thermodynamic equation at 1 atm. It was also found that the decay of the arc discharge produced using the tungsten-copper electrodes was much faster than that produced using the tungsten electrodes.

Original languageEnglish
Pages (from-to)458-464
Number of pages7
JournalIEEJ Transactions on Fundamentals and Materials
Volume133
Issue number9
DOIs
Publication statusPublished - Oct 7 2013

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Electron temperature
Discharge (fluid mechanics)
Carrier concentration
Tungsten
Vapors
Scattering
Plasmas
Electrodes
Lasers
Copper
Electric potential
Thermodynamics
Temperature
Air

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

Measurements of electron density and electron temperature of arc discharge plasmas containing metallic vapors using laser thomson scattering. / Tomita, Kentaro; Yoshitake, Shinya; Uchino, Kiichiro; Takenaka, Daigo; Toda, Hiroaki; Hikita, Masayuki; Suzuki, Katsumi.

In: IEEJ Transactions on Fundamentals and Materials, Vol. 133, No. 9, 07.10.2013, p. 458-464.

Research output: Contribution to journalArticle

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AU - Tomita, Kentaro

AU - Yoshitake, Shinya

AU - Uchino, Kiichiro

AU - Takenaka, Daigo

AU - Toda, Hiroaki

AU - Hikita, Masayuki

AU - Suzuki, Katsumi

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