| Dual Quantum Cascade Laser Trace
Gas Detector MODEL QCL-76-D |
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Gas analysis system for continuous, accurate and
simultaneous measurement of concentrations and fluxes of multiple
atmospheric trace gases The Dual Quantum Cascade Laser Trace
Gas Detector MODEL QCL-76-D, is based on the extensive experience at
Aerodyne Research, Inc. of providing high precision trace species
measurement instruments to researchers in the atmospheric measurements
community. Applications : Infrared absorption
measurement of multiple trace gases such as: CH4, N2O, CH2O, CO2, NO, NO2,
C2H6, NH3, O3, SO2, H2O2, and HNO3. Atmospheric research requiring a
high fidelity instrument flexible and rugged enough to operate in field
experiments. Remote sensing of emissions over swamps or bogs not
readily accessible from conventional ground based platforms. |
| Astigmatic Multi- pass Absorption
Cell (AMAC) |
 |
Long path length - low volume fast response
absorption cell for tunable laser spectroscopy and atmospheric trace gas
detection.
| Optical Design |
Astigmatic two-mirror system with central
coupling hole. |
| Mirrors |
Nickel plated aluminum with broad-band dielectric
coating. |
| Wavelength range |
3 to 11 µm (actual range may be broader). |
| Reflectivity |
99.2 % |
| Window material |
BaF2 |
| Body materials |
Nickel plated aluminum, stainless steel end flanges,
Pyrex tube. | |
Aerosol Mass Spectrometer
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The Aerodyne AMS provides quantitative real-time
Size-resolved composition analysis of nonrefractory particulate matter.
Aerosol particles in the size range 0.04 to ~1.0 micrometers are
sampled into a high vacuum system where they are aerodynamically focused
into a narrow beam (~1 mm diameter). The particle beam is directed onto a
resistively heated surface where volatile and semi volatile chemical
components are thermally vaporized and detected via standard 70 eV
electron impact ionization quadrupole mass spectrometry. Particle
aerodynamic diameter is determined from particle time of- flight
(velocity) measurements using a beam chopping technique. |