Carbon isotopomers measurement using mid-IR tunable laser sources.
Recent developments of two mid-infrared tunable laser spectrometers dedicated to carbon isotope ratio determination are presented. First, a field deployable quantum cascade laser-based sensor is described, along with line selection strategy for (13/12)CO(2) ratio measurements. Secondly, an instrument architecture based on difference frequency generation is presented. The analyses of fundamental limitations, specifically temperature and pressure stability, and water vapor collision broadening, are detailed.
Space Science Department, CCLRC Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 0QX, UK. d.weidmann@rl.ac.uk
Damien
D
Weidmann
Chad B
CB
Roller
Clive
C
Oppenheimer
Alan
A
Fried
Frank K
FK
Tittel
D002245:Carbon Dioxide / Q000032:analysis* / Q000737:chemistry; D002247:Carbon Isotopes / Q000032:analysis*; D004784:Environmental Monitoring / Q000295:instrumentation / Q000379:methods*; D006813:Humidity; D007834:Lasers; D011312:Pressure; D013055:Spectrophotometry, Infrared / Q000295:instrumentation / Q000379:methods*; D013696:Temperature; D018707:Volcanic Eruptions / Q000032:analysis
D002247:Carbon Isotopes; D002245:Carbon Dioxide