C2 Radical (C2) - LIF:

Transitions: Swan bands: d 3Pg <--> a 3Pu (0,1), (1,2), (2,3), (3,4) bands (excitation wavelength: about 563,0 nm to 520,0 nm)

Appearance of the C2 transitions: Swan bands: Degraded to the violet

Excitation wavelength: 565,0 to 520,0 nm (VIS) and 282,5 to 260,0 nm (UV)

Flame/Burner: acetylene/oxygen (C2H2/O2) flame of a welding torch

Grating of the spectrograph: 100 l/mm

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Grating: 100 lines/mm, only VIS excitation, Emissions: 290 to 710 nm

EES, point of measurement:

   center (inner cone of the flame)

Excitation wavelength:

   UV:  no UV excitation

   VIS: 566,00 nm to 520,00 nm

Emission wavelength:

   290 nm to 710 nm

EES, point of measurement:

    off-center  (outer range of the flame)

Excitation wavelength:

   UV: no UV excitation

   VIS: 566,00 nm to 520,00 nm

Emission wavelength:

   290 nm to710 nm

Single Image:

   local distribution of signals inside the flame

Excitation wavelength:

   UV: no UV excitation

   VIS: 558,32 nm

Detected signals:

   Rayleigh scattering: VIS

   C2-LIF d-a / from d-a (0,1), (1,2), (2,3) ... excitations:

      (Swan bands, starting at 563,0 nm)

   C2-LIF / Swan band emissions:

      (438 nm, 473 nm, 516 nm, 563 nm, 619 nm, 685 nm)

   C2-LIF / Deslandres d'Azambuja band emissions:

      (385 nm)

   broadband fluorescence of hydrocarbon species:

      (about 300 nm to 450 nm)

Detected signals:

   Rayleigh scattering: VIS

   C2-LIF d-a, no others

Download common measurement report for detailed informations about flame, laser beam position, pulse energy, ICCD gain, etc: 

Download MS Word file:

Download Davis file:

Download ASCII file:

Download Davis file:

Download ASCII file:

CCD dynamic: 12 bit / ICCD gain: 8,52 / entrance slit: 50 mm / sum of pulses: 50 /

VIS pulse energy: about 14,9 to 20,0 mJ/pulse

   

Grating: 100 lines/mm, only UV excitation, Emissions: 190 to 605 nm

EES, point of measurement:

   center (inner cone of the flame)

Excitation wavelength:

   UV:  274,50 nm to 258,00

   VIS: no UV excitation

Emission wavelength:

   190 nm to 605 nm

EES, point of measurement:

    off-center  (outer range of the flame)

Excitation wavelength:

   UV: 274,50 nm to 258,00

   VIS: no UV excitation

Emission wavelength:

  190 nm to 605 nm

Single Image:

   local distribution of signals inside the flame

Excitation wavelength:

   UV: 262,26 nm

   VIS: no UV excitation

Detected signals:

   Rayleigh scattering: UV (+ 2nd order)

      C2-LIF / Swan band emissions:

      (438 nm, 473 nm, 516 nm, 563 nm)

   C2-LIF / Deslandres d'Azambuja band emissions:

      (360 nm, 385 nm, 410nm, 438 nm)

   broadband fluorescence of hydrocarbon species:

      (about 300 nm to 450 nm)

   OH-LIF A-X / from A-X (2,0) excitation (weak)

   (laser intensity fluctuations during the measurement!)

Detected signals:

   Rayleigh scattering: UV

   NO-LIF A-X / from A-X (0,4) and (1,5) excitations:

(starting at 272,0 nm (0,4) and 267,9 nm (1,5))

   NO-LIF A-X emissions:

(286 nm, 272 nm, 260 nm, 248 nm, 237 nm, 227 nm, 215 nm)

   NO-LIF A-X / from A-X (0,3) excitation:

(starting at 259,5 nm (0,3))

   NO-LIF A-X emissions:

(301 nm, 286 nm, 272 nm, 260 nm, 248 nm, 237 nm, 227 nm)

   OH-LIF A-X / from A-X (2,0) excitation:

(starting at: 259,2 nm (2,0))

   OH-LIF A-X emissions:

(259 - 275 nm, 278 - 302 nm, 302 - 335 nm, 405 nm)

   hot O2-LIF (see also chapter O2)

   Rayleigh, NO-LIF and OH-LIF in 2nd order

Download common measurement report for detailed informations about flame, laser beam position, pulse energy, ICCD gain, etc: 

Download MS Word file:

Download Davis file:

Download ASCII file:

Download Davis file:

Download ASCII file:

CCD dynamic: 12 bit / ICCD gain: 9,9 / entrance slit:100 mm / sum of pulses: 50 /

UV pulse energy: not measured

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