I have seen people using 1.39 µm, 2,5 µm respectively. Currently, I am working with 1,392 µm to measure H2O. Also, one can choose the appropriate wavelength from the 'spectraplot' as well. Can anyone really suggest or have worked with a shock tube using TDLAS to study Chemical Kinetics?
Your valuable feedback in this regard would be really helpful. Looking forward to a response.
Thank you.
Never worked with shock tubes experiment but will answer from the gas sensing perspective:
What sensitivity do you require for H2O?
What is the expected concentration ranges?
What pathlength will you have?
Temperature and pressure ranges expected?
Temporal resolution?
Dear Sumit.
I would recommend to get in touch with the Hanson lab in Stanford. They have done lots of laser spectrosopy in shock tubes, in paticular detection of H2O. On their website (hanson.stanford.edu) you will find the PhD thesis of Hejie Li from 2007 where you can find details on the 1392/1398 nm absorption lines. In a later paper (J. Phys. Chem A, 2010, 114, 18: 5718-27) they measured time histories of H2O in a shock tube using 2550.96 nm (this might tell you already something).
I hope that helps,
Wolfgang
Unfortunately, this field is not my research area so far I have no opinion on this field.
- Badges
- Science method
- Similar topics
- Methodology
- Absorption Spectroscopy