Single-pulse gas thermometry at low temperatures using two-photon laser-induced fluorescence in NO-N(2) mixtures.
A technique suitable for measuring fluctuating temperatures in supersonic turbulent flows of N(2) 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 gamma(A(2)Sigma+,'=0?X(2)II,''=0) band. Measurements between 155 and 295 K in N(2) mixtures containing 300 parts in 10(6) NO were obtained with single-pulse errors below 4% rms.
Gross
K P
KP
McKenzie
R L
RL