Flow Reactor Study of Controlled Combustion Kinetics GCEP Global
Requirements for Combustion Kinetics Studies at JLab
description
Transcript of Requirements for Combustion Kinetics Studies at JLab
![Page 1: Requirements for Combustion Kinetics Studies at JLab](https://reader035.fdocuments.us/reader035/viewer/2022062222/568164f8550346895dd766a8/html5/thumbnails/1.jpg)
Requirements for Combustion Kinetics Studies at JLab
Craig A. Taatjes, David L. Osborn, Leonid Sheps
![Page 2: Requirements for Combustion Kinetics Studies at JLab](https://reader035.fdocuments.us/reader035/viewer/2022062222/568164f8550346895dd766a8/html5/thumbnails/2.jpg)
Photon Beam Requirements
• Tunability– Require photon energies from ~ 6 eV to ~16 eV, depending on
the specific target – Continuous tunability is important for species quantification– Piecewise-continuous or partial coverage is less desirable
• Energy bandwidth – Energy bandwidth of 25 meV is sufficient – Probably need to separate fundamental, higher harmonics out
• High average power, low peak intensity– Keep peak intensity less than ~ 500 kW / cm2 – Collimated beam, diameter <~ 2 mm if possible
![Page 3: Requirements for Combustion Kinetics Studies at JLab](https://reader035.fdocuments.us/reader035/viewer/2022062222/568164f8550346895dd766a8/html5/thumbnails/3.jpg)
Requirements for Experimental Hall
• Footprint of reaction chamber– Also need cart with excimer laser– Pumps with exhaust: scroll pumps backing turbos, roots blower
for reactor– Associated computer equipment
• Chemical handling – toxic gases – excimer gases, Cl2, NO2
– toxic liquids delivered from bubblers– flammable gases
• No extraordinary power and water requirements– Water cooling for turbos and excimer– 208 3-phase for excimer ?
![Page 4: Requirements for Combustion Kinetics Studies at JLab](https://reader035.fdocuments.us/reader035/viewer/2022062222/568164f8550346895dd766a8/html5/thumbnails/4.jpg)
Connection to Beamline
Laser cart is 34.5 x 49 inches, 100 inches high
![Page 5: Requirements for Combustion Kinetics Studies at JLab](https://reader035.fdocuments.us/reader035/viewer/2022062222/568164f8550346895dd766a8/html5/thumbnails/5.jpg)
Orthogonal Extraction Time-of-Flight
Coles and Guilhaus, Trends in Analytical Chemistry, 12, 203 (1993).
![Page 6: Requirements for Combustion Kinetics Studies at JLab](https://reader035.fdocuments.us/reader035/viewer/2022062222/568164f8550346895dd766a8/html5/thumbnails/6.jpg)
Sandia OA-TOF
continuous ion optics
differential-pumping wall
orthogonalextractor
![Page 7: Requirements for Combustion Kinetics Studies at JLab](https://reader035.fdocuments.us/reader035/viewer/2022062222/568164f8550346895dd766a8/html5/thumbnails/7.jpg)
Photon and Ion Beam Paths
0.25 inch between repeller and extractor
2 mm apertures in repeller and extractor
~2 mm is maximum useful photon beam diameter (smaller is better for mass resolution)