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Auxiliary Laboratories and Facilities Equipment

5. PULSED VISIBLE/UV SPECTROSCOPY AND COMBUSTION KINETICS
(6-031, Prof. W.H. Green, Department of Chemical Engineering, and Prof. R.W. Field)

Experiments in this laboratory focus on investigating hydrocarbon radical reactions relevant in combustion processes. Radicals are generated via photolysis using either the excimer laser or the 10 Hz Nd:YAG 266 nm output. The spectra are recorded in the UV region by direct absorption (Herriott cell/Cavity RingDown Spectroscopy), where the UV is generated by the doubled output of a ND:YAG (50 Hz) pumped dye laser.

Spectra Physics Quanta-Ray GCR-3 Nd:YAG Laser
300 mJ (532 nm) 70 mJ (266 nm); pulse duration 12 ns; rep rate 1-20 Hz.

Spectra Physics 270-50 Pro Series Nd:YAG
410 mJ (532 nm) 240 mJ (355 nm); pulse duration 12 ns; rep rate 50Hz.

Lambda Physik FL 3002E Dye Laser
Pulse energy 0.1-15 mJ; computer controlled tuning range (330-860nm); bandwidth ~1cm-1 (grating) and 0.01cm-1 (etalon).

Lambda Physik Compex 102 Excimer Laser (fluorine gases)
220 mJ (248 nm); pulse duration ~20 ns; rep rate up to 20 Hz.

Leybold RUVAC WSU251 Roots Blower
Nominal pumping speed: 253 m3h-1.

Doubling Crystals
KDP- pulse energy: 1-5 mJ (260-360nm); BBO- pulse energy 0.1-1mJ (220-340 nm).