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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2015-09-18
Experimental and Numerical Investigations of Line-Shaped Microwave Argon Plasma Source
By
Essam Abdel-Fattah,

    Dr. Essam Abdel-Fattah

    Department of Physics

    Salman bin AbdulAzi Saud University

    Saudi Arabia

    Homepage

Haru Shindo,

    Dr. Haru Shindo

    Tokai Univ

    Japan

    Homepage

Refat Sabry,

    Prof. Refat Sabry

    Physics Department, College of Science

    Prince Sattam Bin Abdul-Aziz University

    Saudi Arabia

    Homepage

Alla El Kotp

    Dr. Alla El Kotp

    Physics Department, College of Science

    Prince Sattam Bin Abdul-Aziz University

    Saudi Arabia

    Homepage

Progress In Electromagnetics Research M, Vol. 43, 183-192, 2015
doi:10.2528/PIERM15071004 | Google Scholar

Abstract
In the following, numerical and experimental results for a line-shaped argon plasma source over a wide range of gas pressure (2 Torr-50 Torr) and microwave power (200-800 W) are presented. The line-shaped plasmas have been generated in a rectangular Pyrex tube, 15 mm in height and 5 mm inner width, placed-in a linear slot made in the upper wide wall of a custom-made narrow rectangular waveguide. The microwave power is coupled to the discharge gas via the slot. The effects of the waveguide width, power level (electron density, and discharge tube insertion depth on the excited axial (along x) electric field profile and hence the uniformity of the produced plasmas are investigated numerically using commercial software CST Microwave Studio®, and charge coupled device (CCD) camera. Results showed that, a uniform line-shaped plasma is generated as waveguide width decreased to 58 mm, plasma density value <<nres = 3.7 × 1011 cm-3, and discharge tube insertion depth = 0 mm. An optical emission spectroscopy study was also realized to deduce the relative density of argon species and electron excitation temperature Texc. In general, argon spectral lines intensity was increased enhanced markedly when microwave power increased, while the different lines showed different behavior as argon pressure increased. The electron excitation temperature Texc decreases with increasing argon pressure, but almost constant overall the whole plasma length.
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Citation
Essam Abdel-Fattah, Haru Shindo, Refat Sabry, and Alla El Kotp, "Experimental and Numerical Investigations of Line-Shaped Microwave Argon Plasma Source," Progress In Electromagnetics Research M, Vol. 43, 183-192, 2015.
doi:10.2528/PIERM15071004
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