The CESAM chamber home page


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
Measurement Typical Det. limit
(time resolution)
Physical Temperature sensor
(Vaisala HMP 234)
Temperature +/-0.1°C Base
Physical Pressure gauge
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
(Kore ltd.)
VOC, OVOC,… 0.1 ppb (60 seconds) Base
Gas NOx Analyser
(Horiba APNA370)
1 ppb (120 seconds)
1 ppb (120 seconds)
Gas O3 Analyser
(Horiba APOA370)
O3 1 ppb (120 seconds) Base
Gas NO2 Analyser
(Teledyne T500U)
NO2 0.04 ppb (30 seconds) Base
CO2, CO 5ppm ; 10ppb (45 seconds) Base
Gas in-situ FTIR
(Bruker Tensor 37)
VOC, NOx, NOy, Ozone variable ~5 ppb
(5 minutes)
Gas/Aerosol in-situ UV-Visible
VOC, NOx, NOy, Ozone
Aerosol light Extinction
variable ~5 ppb
(5 minutes)
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
Organic, Sulfate, Nitrate, Ammonium, Chloride (10 minutes) Base
Aerosol Aerodynamic Aerosol Classifier
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)
Gas Automatic GC- FID
(Perkin Elmer Clarus 680)
VOC variable ~0.5 ppb
(30 minutes)
Gas NOyBOx
(Home made)
NO3, N2O5, HONO, NO, NO2, NOy variable ppt range
(2 minutes)
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
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)
Aerosol External CRDS
CAPS-Pmex Aerodyne
Aerosol light Extinction @ 630 nm 2 Mm-1
(2 seconds)
Aerosol External CRDS
CAPS-Pssa Aerodyne
Single Scattering Albedo @ 450 nm 3 Mm-1
(2 seconds)
Aerosol External CRDS
CAPS-Pssa Aerodyne
Single Scattering Albedo @ 630 nm 3 Mm-1
(2 seconds)
Aerosol Nephelometer
(TSI 3596)
3 Wavelength aerosol light scattering
(450, 550, 700 nm)
0.3 Mm-1
(30 seconds)
Aerosol Aethalometer
(AE-31 Magee Scientific)
7 Wavelength absorption
(370, 420, 470, 520, 660, 870, 950 nm)
X Mm-1
(2 min)
Physical Spectroradiometer
LiCOR 1800
Actinic Flux Optional