PKENefedov Symposium 2004

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PKE-Nefedov Symposium - 2004
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Objectives
1. Diagnostics of concentrations of excited neon
atoms. 2. Developing of combined diagnostic
probe-optic methods. 3. Control of plasma
impurities.
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Optical Diagnostics of Plasma in PK-4 Project
Spectral Diagnostics
Glow Image Diagnostics
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Glow Image Diagnostics
Phantom-5 ? 1
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The spectral transmittance of the PK4-chamber
glass.
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Emission Intensity of Ne
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Intensity vs Electron Density in DC-mode
Ne 50 Pa
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Intensity vs Electron Density in DC/RF(i)-mode
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Intensity Distribution in 2RF(i)-mode
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Temporal Behavior of DC Discharge 20000 fps ? 20
fps
10 Pa
50 Pa
300 Pa
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Spectral Diagnostics
1. Emission spectroscopy measurements of
concentration of highly excited neon atoms. 2.
Absorption spectroscopy measurements of
concentration of metastable and resonance neon
atoms. 3. Emission spectroscopy control of
plasma impurities.
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Emission spectroscopy measurements of
concentration of highly excited neon atoms by the
method of absolute intensities
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Emissive spectrum of Ne in DC discharge 3 mA 50
Pa.
2p ? 1s
3p ? 1s
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Emission spectroscopy measurements of
concentration of highly excited neon atoms by the
method of absolute intensities
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Absolute concentrations of 2p and 3p levels of
neon in RF(i) discharge at 10, 100 and 1000 Pa.
1000 Pa
100 Pa
10 Pa
2p-levels
3p-levels
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Local Thermal Equilibrium of 2p-levels of Neon in
RF(i) discharge at 10, 100 and 1000 Pa
p1000 Pa
p100 Pa
p10 Pa
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Absorption spectroscopy measurements of
concentration of metastable and resonance neon
atoms by the method of one mirror.
Mirror
Chopper
PK4 chamber
Lens
C
Spectrometer translation
CM
High voltage
PMT
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Measurements of concentration of metastable and
resonance neon atoms by the method of one mirror.
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Typical Spectrogram.
R0.92
For Doppler shape of line
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Population of 1s-Levels vs Direct Current (at
50 Pa)
IDC 5 mA
IDC 15 mA
IDC 1 mA
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Total Density of Ne-3S Atoms vs Direct Current
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Population of 1s Levels vs Ne Pressure
p 50 Pa
p 12 Pa
p 25 Pa
p 100 Pa
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Emission spectroscopy - Diagnostics of Gas
Mixtures
1. Ne 2Xe. 2. Ne O2. 3. Ne Air Leakage.
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Emission Spectra of pure Ne and Ne2Xe-mixture
50 Pa of Ne, 3 mA_433V
Ne(2p ? 1s)
50 Pa of Ne2Xe, 3 mA_400V
Xe(2p ? 1s)
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Reference Spectra of Pollutants O2 and N2
O2
H?
N2
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UV Reference Spectra of Pollutants O2 and N2
O2
Used O2-band
N2
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OH Spectra of Pollutant H2O
Old Ne balloon
N2
OH
New Ne balloon
N2
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Emission Spectra of pure Ne and Ne0.05O2,
Ne0.15O2 -mixtures
N2-band
N2-band
N2-band
O2-band
O2-band
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Comparison of Spectroscopic and Probe Data for
Ne, Ne0.05O2 and Ne0.15O2 -mixtures
ne
INe
E
IO2
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Spectral Intensities of Ne, N2 and O2 vs Air
Addition
Ne
Ne
Ne
N2
N2
N2
N2
N2
N2
Ne
Ne
Ne
O2
O2
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Comparison of Spectral and Probe Data Drifts at
Air Leakage
N2
Ne
O2?10
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Conclusion
1.. 2.. 3..
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Thank you for your attention