The CESAM chamber home page
Description
The CESAM chamber is a 4.2 m3 stainless steel atmospheric simulation chamber. It is evacuable down to a few 10-7 atm and is temperature controlled between +15°C and +60°C. It is equipped with high power xenon arc lamps which the artificial light source the more realistic to sun irradiation. Due to the very low level of electrostatic charges on its wall the aerosol lifetime in CESAM can be very long for submicron particle (up to 4 days) which enable the study of the ageing processes of secondary aerosol as well as their consequences on their properties.
The scientific spectrum of CESAM is nevertheless much larger than SOA studies as it is also possible to generate cloud events in CESAM, to inject desert dust, to seed with ionic aerosols, to inject soots, to perform photochemistry study.
The full description of CESAM has been published in Wang et al, 2011.
CESAM is equipped with a comprehensive sets of analytical instruments and benefit from the instrumental environment dedicated to atmospheric chemistry provided by provided by LISA.
| Instrument | Instruments (Type) |
Measurement | Typical Det. limit (time resolution) |
Status |
| Physical | Temperature sensor (Vaisala HMP 234) |
Temperature | +/-0.1°C | Base |
| Physical | Pressure gauge (Baratron) |
Pressure | 1.5 – 10-7 atm. | Base |
| Physical | Chilled Miroir (Michell Optidew 501) |
Dew point | +/-0.15°C | Base |
| Gas | Hygrometer (Vaisala HMP 234) |
Relative humidity | 2% | Base |
| Gas | PTR-ToF-MS (Kore ltd.) |
VOC, OVOC,… | 0.1 ppb (60 seconds) | Base |
| Gas | NOx Analyser (Horiba APNA370) |
NO NOX |
1 ppb (120 seconds) 1 ppb (120 seconds) |
Base |
| Gas | O3 Analyser (Horiba APOA370) |
O3 | 1 ppb (120 seconds) | Base |
| Gas | NO2 Analyser (Teledyne T500U) |
NO2 | 0.04 ppb (30 seconds) | Base |
| Gas | ProCEAS (APEE) |
CO2, CO | 5ppm ; 10ppb (45 seconds) | Base |
| Gas | in-situ FTIR (Bruker Tensor 37) |
VOC, NOx, NOy, Ozone | variable ~5 ppb (5 minutes) |
Base |
| Gas/Aerosol | in-situ UV-Visible (Home-Made) |
VOC, NOx, NOy, Ozone Aerosol light Extinction |
variable ~5 ppb (5 minutes) |
Base |
| Aerosol | SMPS (TSI 3080 + TSI3025) |
Aerosol size distribution (10 to 850 nm) | (2 minutes) | Base |
| Aerosol | Light-scattering aerosol (Palas Welas digital 2000) |
Aerosol size distribution (0.3 μm to 17 μm) | (10 seconds) | Base |
| Aerosol | Aerosol Chemical Speciation Monitor (Aerodyne) |
Organic, Sulfate, Nitrate, Ammonium, Chloride | (10 minutes) | Base |
| Aerosol | Aerodynamic Aerosol Classifier (Cambustion) |
Aerosol size distribution (25 nm to 5 μm) | (10 minutes) | Base |
| Gas | SO2 Analyser (Horiba APSA370) |
SO2 | 1 ppb (120 seconds) | Optional |
| Gas | Sorbent cartridges + GC-MS (Varian CP3800 – Saturn 2200) |
VOC | variable ~0.1 ppb (15 minutes) |
Optional |
| Gas | Automatic GC- FID (Perkin Elmer Clarus 680) |
VOC | variable ~0.5 ppb (30 minutes) |
Optional |
| Gas | NOyBOx (Home made) |
NO3, N2O5, HONO, NO, NO2, NOy | variable ppt range (2 minutes) |
Optional |
| Aerosol | Supercritical Fluid Extraction- GC-MS (Varian CP3800 – Q1200) |
Organic aerosols | 10 ng / compound/ filter | Optional |
| Aerosol | Particle Into Liquid Sampler (Metrohm ADI 2081) |
Soluble aerosols | Optional | |
| Aerosol | EC/OC (Sunset) |
Elemental carbon and organic fraction of particle | Optional | |
| Aerosol | Hygroscopy Tandem DMA (Home made) |
Particle hygroscopicity | see denjean et al, 2014 | Optional |
| Aerosol | Analytical Electron microscopes | Particle shape - Micro-elemental-analysis | Optional | |
| Aerosol | External CRDS CAPS-Pmex Aerodyne |
Aerosol light Extinction @ 450 nm | 2 Mm-1 (2 seconds) |
Optional |
| Aerosol | External CRDS CAPS-Pmex Aerodyne |
Aerosol light Extinction @ 630 nm | 2 Mm-1 (2 seconds) |
Optional |
| Aerosol | External CRDS CAPS-Pssa Aerodyne |
Single Scattering Albedo @ 450 nm | 3 Mm-1 (2 seconds) |
Optional |
| Aerosol | External CRDS CAPS-Pssa Aerodyne |
Single Scattering Albedo @ 630 nm | 3 Mm-1 (2 seconds) |
Optional |
| Aerosol | Nephelometer (TSI 3596) |
3 Wavelength aerosol light scattering (450, 550, 700 nm) |
0.3 Mm-1 (30 seconds) |
Optional |
| Aerosol | Aethalometer (AE-31 Magee Scientific) |
7 Wavelength absorption (370, 420, 470, 520, 660, 870, 950 nm) |
X Mm-1 (2 min) |
Optional |
| Physical | Spectroradiometer LiCOR 1800 |
Actinic Flux | Optional |
