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0.65 m spectrometer: (View 1) Multi-Camera Raman/Rayleigh/LIPF 0.65 m spectrometer
designed at Vanderbilt University to make simultaneous, multi-point, single shot
measurements of the complex Raman spectra and OH LIPF in methane/air flames.
The spectrometer is also designed to measure the Rayleigh signal to determine temperature
in the flame.
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0.65 m spectrometer: (View 2) The spectrometer uses a Princeton Instruments
Liquid Nitrogen / Charge Coupled Device (LN/CCD) Camera to record CO2, O2, CO, N2 and CH4 Raman
signals. The LN/CCD is the leftmost camera in this view. |
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0.65 m spectrometer: (View 3) The Intensified Charge Coupled Device
(ICCD) camera measures H2O and H2 Raman signals, and a second ICCD measures the OH
Laser-Induced Predissociative Fluorescence (LIPF). The ICCD's are the two cameras on
top of the spectrometer.
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0.65 m spectrometer: (View 4) The Intensified Photo Diode Array (IPDA)
is used to measure the Rayleigh signal. The IPDA can be seen on the front door of the spectrometer
in this view. The large (12.5 in diameter) 0.65 m focal length focusing mirror can also be clearly seen
in this view. Located under the focusing mirror is the collimating mirror.
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0.65 m spectrometer: (View 5) Inside view of the spectrometer.
Both front doors are removed. |
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0.65 m spectrometer: (View 6) Close-up view of the spectrometer
with both front doors removed.
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0.65 m spectrometer: (View 7) Inside view of the spectrometer
with both front doors removed, as well as the IPDA. Plane mirrors are used to pick off
parts of the spectra to be directed into the two ICCD's and IPDA.
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0.65 m spectrometer: (View 8) Side view of the spectrometer
with both front doors removed, as well as the IPDA. Butyl Acetate cells are used
in front of the LN/CCD and ICCD cameras to block out the Rayleigh signal, which is
about 1000 times greater in intensity than the Raman siganls.
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