scholarly journals Aircraft‐borne, laser‐induced fluorescence instrument for the in situ detection of hydroxyl and hydroperoxyl radicals

1994 ◽  
Vol 65 (6) ◽  
pp. 1858-1876 ◽  
Author(s):  
P. O. Wennberg ◽  
R. C. Cohen ◽  
N. L. Hazen ◽  
L. B. Lapson ◽  
N. T. Allen ◽  
...  
Keyword(s):  
Laser Induced Fluorescence ◽  
In Situ Detection

Prototype for In Situ Detection of Atmospheric NO3and N2O5via Laser-Induced Fluorescence

2003 ◽  
Vol 37 (24) ◽  
pp. 5732-5738 ◽  
Author(s):  
Ezra C. Wood ◽  
Paul J. Wooldridge ◽  
Jens H. Freese ◽  
Tim Albrecht ◽  
Ronald C. Cohen
Keyword(s):  
Laser Induced Fluorescence ◽  
In Situ Detection

Application of a compact all solid-state laser system to the in situ detection of atmospheric OH, HO2, NO and IO by laser-induced fluorescence

2002 ◽  
Vol 5 (1) ◽  
pp. 21-28 ◽  
Author(s):  
William J. Bloss ◽  
Thomas J. Gravestock ◽  
Dwayne E. Heard ◽  
Trevor Ingham ◽  
Gavin P. Johnson ◽  
...  
Keyword(s):  
Solid State ◽  
Laser System ◽  
Laser Induced Fluorescence ◽  
Solid State Laser ◽  
State Laser ◽  
In Situ Detection

scholarly journals A new airborne laser-induced fluorescence instrument for in situ detection of formaldehyde throughout the troposphere and lower stratosphere

2015 ◽  
Vol 8 (2) ◽  
pp. 541-552 ◽  
Author(s):  
M. Cazorla ◽  
G. M. Wolfe ◽  
S. A. Bailey ◽  
A. K. Swanson ◽  
H. L. Arkinson ◽  
...  
Keyword(s):  
High Performance ◽  
Laser Induced Fluorescence ◽  
Full Description ◽  
Mixing Ratios ◽  
Typical Sample ◽  
System A ◽  
In Situ Detection ◽  
Standard Precision ◽  
Stable Signal

Abstract. The NASA In Situ Airborne Formaldehyde (ISAF) instrument is a high-performance laser-based detector for gas-phase formaldehyde (HCHO). ISAF uses rotational-state specific laser excitation at 353 nm for laser-induced fluorescence (LIF) detection of HCHO. A number of features make ISAF ideal for airborne deployment, including (1) a compact, low-maintenance fiber laser, (2) a single-pass design for stable signal response, (3) a straightforward inlet design, and (4) a stand-alone data acquisition system. A full description of the instrument design is given, along with detailed performance characteristics. The accuracy of reported mixing ratios is ±10% based on calibration against IR and UV absorption of a primary HCHO standard. Precision at 1 Hz is typically better than 20% above 100 pptv, with uncertainty in the signal background contributing most to variability at low mixing ratios. The 1 Hz detection limit for a signal / noise ratio of 2 is 36 pptv for 10 mW of laser power, and the e fold time response at typical sample flow rates is 0.19 s. ISAF has already flown on several field missions and platforms with excellent results.

scholarly journals A new airborne laser-induced fluorescence instrument for in situ detection of Formaldehyde throughout the troposphere and lower stratosphere

2014 ◽  
Vol 7 (8) ◽  
pp. 8359-8391 ◽  
Author(s):  
M. Cazorla ◽  
G. M. Wolfe ◽  
S. A. Bailey ◽  
A. K. Swanson ◽  
H. L. Arkinson ◽  
...  
Keyword(s):  
High Performance ◽  
Laser Induced Fluorescence ◽  
Full Description ◽  
Mixing Ratios ◽  
Typical Sample ◽  
System A ◽  
In Situ Detection ◽  
Standard Precision ◽  
Stable Signal

Abstract. The NASA In Situ Airborne Formaldehyde (ISAF) instrument is a high-performance laser-based detector for gas phase formaldehyde (HCHO). ISAF uses rotational-state specific laser excitation at 353 nm for laser-induced fluorescence (LIF) detection of HCHO. A number of features make ISAF ideal for airborne deployment, including (1) a compact, low-maintenance fiber laser, (2) a single-pass design for stable signal response, (3) a straightforward inlet design, and (4) a standalone data acquisition system. A full description of the instrument design is given, along with detailed performance characteristics. The accuracy of reported mixing ratios is ±10% based on calibration against IR and UV absorption of a primary HCHO standard. Precision at 1 Hz is typically better than 20% above 100 pptv, with uncertainty in the signal background contributing most to variability at low mixing ratios. The 1 Hz detection limit for a signal/noise ratio of 2 is 36 pptv for 10 mW of laser power, and the e-fold time response at typical sample flow rates is 0.19 s. ISAF has already flown on several field missions and platforms with excellent results.

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