Single-pulse gas thermometry at low temperatures using two-photon laser-induced fluorescence in NO–N_2 mixtures
Open Access
- 1 July 1983
- journal article
- Published by Optica Publishing Group in Optics Letters
- Vol. 8 (7) , 368-370
- https://doi.org/10.1364/ol.8.000368
Abstract
A technique suitable for measuring fluctuating temperatures in supersonic turbulent flows of N2 seeded with NO has been demonstrated in a nonflowing cell. The method relies on the two-photon excitation of two selected rovibronic transitions in the NO γ(A2∑+, υ′ = 0 ← X2Π, υ″ = 0) band. Measurements between 155 and 295 K in N2 mixtures containing 300 parts in 106 NO were obtained with single-pulse errors below 4% rms.Keywords
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