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McNair Scholars Research Journal
Volume 3 | Issue 1 Article 4
January 2011
Comparing Langmuir Probe Traces of DierentDebye Length-to-Probe Radius Ratios
Mariano MarksEastern Michigan University, [email protected]
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Marks, Mariano (2011) "Comparing Langmuir Probe Traces of Dierent Debye Length-to-Probe Radius Ratios,"McNair ScholarsResearch Journal: Vol. 3: Iss. 1, Article 4.Available at: hp://commons.emich.edu/mcnair/vol3/iss1/4
http://commons.emich.edu/mcnairhttp://commons.emich.edu/mcnair/vol3http://commons.emich.edu/mcnair/vol3/iss1http://commons.emich.edu/mcnair/vol3/iss1/4mailto:[email protected]:[email protected]:[email protected]:[email protected]://commons.emich.edu/mcnair/vol3/iss1/4http://commons.emich.edu/mcnair/vol3/iss1http://commons.emich.edu/mcnair/vol3http://commons.emich.edu/mcnair8/3/2019 Comparing Langmuir Probe Traces
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CT
DD
Mariano Marks
Dr. James Carroll, Mentor
INTRODUCTION
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n
and its energy kTe
kTe
.
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Debye
sheath
D
C2
2)) and e
D
D
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Comparing Langmuir Probe Traces of Different Debye Length-to-Probe Radius Ratios
Probe wire radius Debye lengthProbe-radius-to-
Debye-length ratio (X)Alumina outer
diameter
.07 mm .1 mm 0.7 : 11.21 mm
(.3 mm bore dia.)
.11 mm .1 mm 1.1 : 11.61 mm
(.7 mm bore dia.)
.33 mm .1 mm 3.3 : 1 1.22 mm
.83 mm .1 mm 8.3 : 1 2.6 mm
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Comparing Langmuir Probe Traces of Different Debye Length-to-Probe Radius Ratios
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EXPERIMENT
Torr after a
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n
VpVfTesaturation current (Ie,sat
Ii,sat
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a) and b)
c)
neA
probe
2ve,th
ni Mi
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Comparing Langmuir Probe Traces of Different Debye Length-to-Probe Radius Ratios
Chen
Merlino
Probe
Vf
(V)
Vp
(V)
T
e
(eV
)
Ii,sat
(
A)
Ie,sat
(
A)
Rad
iu
s(mm
)
ni
(1012)
(part/m
3)
Debye
length
(mm)
X
ne
(1012)
(part/m
3
)
Debye
length
(mm)
X
1
-10
11.5
6.06
0.1
11
4.3
65
.83
46.3
0
2.6
9
0.3
09
4.2
4
8.8
8
0.0
934
2
-10.5
13.5
5.44
0.1
45
2.5
23
.33
86.9
0
1.8
6
0.1
78
6.5
2
6.7
9
0.0
486
3
-10.5
14.5
5.42
0.0
957
1.2
34
.11
152.0
0
1.4
0
0.0
78
9.4
3
5.6
3
0.0
195
4
-9
13
5.47
0.0
719
0.7
96
.07
220.0
0
1.1
7
0.0
60
9.7
9
5.5
5
0.0
126
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CONCLUSION
REFERENCES
source. Plasma Sources Science and Technology 4
Journal of Physics D: Applied
Physics, 42
Introduction to plasma physics and controlled fusion
theory. Plasma Sources Science and Technology, 18
characteristics.American Journal of Physics75
Plasma science: from fundamental research to
technological applications
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