Carbon Monoxide Analyzer (CO-ANALYZER) Instrument Handbook

Technical Report · Fri Aug 14 04:00:00 EDT 2015

DOI:https://doi.org/10.2172/1495422· OSTI ID:1495422

Springston, Stephen ^[1]

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1. Brookhaven National Lab. (BNL), Upton, NY (United States)

The N₂O/CO analyzer uses LGR’s patented Off-axis ICOS technology, which employs a high-finesse optical cavity as the measurement cell. LGR’s technology has many proven advantages over conventional first-generation cavity ringdown spectroscopy (CRDS) techniques. In brief, since the laser beam does not have to be resonantly coupled to the measurement cell, precise beam alignment is not critical. Mentors can disassemble the cell for cleaning (CAREFULLY) the front surface mirrors. Analyzers are relatively inexpensive and inherently robust thermally and mechanically. In addition, since LGR’s technology can record reliable absorption spectra over a far wider range of optical depths (absorbance values) than CRDS, LGR analyzers provide measurements over a much wider range of mixing ratios (gas concentrations). The N₂O/CO analyzer includes an internal computer that sends real-time data to the local instrument computer through its digital (RS-232) output.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States). Atmospheric Radiation Measurement (ARM) Program
• Sponsoring Organization: USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
• OSTI ID: 1495422
• Report Number(s): DOE/SC-ARM-TR--159
• Country of Publication: United States
• Language: English

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