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Page 69
November 13-14, 2017 Paris, France
5th International Conference on
PLASMA CHEMISTRY AND
PLASMA PROCESSING
Journal of Biotechnology and Phytochemistry
Volume 1, Issue 2 Plasma Chemistry 2017
Experimental study of the characterization of
the main properties of DC- Glow discharge
plasma experiment in ASU
Ashraf Yahia1, A A Talab2, M A Saudy1 and M E Ali1
1Ain Sham University, Egypt
2Atomic Energy Authority-Nuclear Research Center, Egypt
The (DC-GDPAU) is a DC glow discharge plasma
experiment which was built and operated in Ain Shams
University. It consists of discharge chamber, vacuum system,
DC electrical circuit and digital storage oscilloscope. The
cylindrical discharge chamber is made of stainless steel inside
it there are two movable parallel circular copper electrodes
(cathode and anode). The working data measured at (d) from
3 to 7 cm respectively. The minimum breakdown voltage () for
each gap length from Paschen curves occurred at the pressure
P of Ar gas 0.3 Torr. So, this is the operating pressure which
used to get plasma at V in the range from 400 to 1800 volts.
The plasma electrical parameters (Ip, Vp, Rp and Wp) are
measured and calculated toproduce complete characterization
to the plasma. The and are measured by using double electric
probe at radial distances r = 2, 4, 6, 8 cm to each gap length
while the operating plasma current was 20 mA. The electron
temperatures were in range from 7.96 eV to 10.44 eV at d = 3
cm, 6.58 eV to 7.65 eV at d = 5 cm and 7.33 eV to 7.99 eV at d
= 7 cm. The ion density was in range from 0.91 × 1010 cm-3
to 1.79 × 1010 cm-3. From these results, it is clear that at gap
length 7 cm the plasma temperature was almost constant at all
radial distances. While at 3 cm this difference was bigger. So,
as application, the samples which exposed to the plasma put
at d = 7 cm. After studying the characterization of the plasma
in this system, a PCB (printed circuit board) samples exposed
to this plasma to study improving some properties of it.
Digital optical microscope was used to show the changing in
the shaping of the samples surfaces. From the images, there is
change in the surfaces. It was studied in this paper to explain
it. This is as part of the collaboration between EAEA and ASU.
Also, the conductivity of the samples studied as collaboration
between electronic unit and central physics laboratory unit
in ASU, and the results showed that the resistance of copper
decreased from Ω to Ω, this means that the conductivity of
the samples increased. The hardness of this sample will study
in the collaboration between Central Metallurgical Research
& Development Institute and ASU.
J Biot Phyt 2017