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 General informationAccess mode  Physical access    Infrastructure name and acronym  CESAM                          Photos        Location  Créteil, France   Website Click here   Legal name of organisation operating the infrastructure      Centre National de la Recherche Scientifique - Laboratoire Interuniversitaire des Systèmes Atmosphériques (CNRS-LISA) Description of the infrastructureBrief general description of the infrastructure to which access is offered                                                  

The CESAM chamber has been designed to perform in realistic conditions experiments involving several phases like organic particles, water droplets, mineral dust, soot, salts and gas phase.

It is an atmospheric simulation chamber dedicated to the study of multiphase atmospheric processes such as the formation of secondary aerosol or gaseous compounds in cloud-phase reactivity. 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. 

CESAM is equipped with a comprehensive set of analytical instruments and benefits from the instrumental environment dedicated to atmospheric chemistry provided by LISA: PTR-ToF-MS (Kore ltd.), NOx Analyser, O3 Analyser, SO2 Analyser, External CRDS (Picarro 2302), Sorbent cartridges + GC-MS, Automatic GC- FID, in-situ FTIR, Hygrometer, Supercritical Fluid Extraction- GC-MS, EC/OC (Sunset), Hygroscopy Tandem DMA, Analytical Electron microscopes, SMPS, Light-scattering aerosol, CAPS-Pmex Aerodyne, CAPS-Pmex Aerodyne, Nephelometre (TSI 3596), Aethalometer (AE-31 Magee Scientific), Spectroradiometer LiCOR 1800…

Features that make it rare in the world: 

- Very long submicronic aerosol lifetime

- Ability to produce clouds

- Protocol for mineral dust seeding

- Temperature control and highly realistic artificial solar irradiation - high cleanliness level

- Quality of the instrumentation    Services currently offered by the infrastructure and its research environment The service offered by the infrastructure include :

-  Access to the full equipment of the CESAM chamber to which can be added when possible the equipment of the Pegasus field facility as well as the clean rooms, two electron microscopes (TEM, SEM)

-  Technical assistance by a staff of highly trained engineers

-  Scientific assistance (including protocol definition and pre-modelling) by permanent researcher at LISA

-  Copy of all the level 0 data at the end of the campaign

-  Data treatment up to level 1 when requested

-  Data saving (>10 years) on the highly secured LISA computer facility

-  Guest office for up to 4 guests and internet access

-  150 m2 lab at ground floor allowing easy access to heavy guest instrument (travelling crane up to 2000 kg available)

-  24h access to the lab if requested support for ordering chemicals and consumables,...

 Modalities of access and support offered under EUROCHAMP-2020   Typical duration of work  

Between 1 and 3 weeks. A typical work includes 2-3 days to carefully prepare the experiments (latest protocol adjustment, connection of potential external instruments, and training on the use of the chamber and the main devices), then 10 days of experiments (1 experiments/day), then 1-2 days for debriefing and base data formatting, saving, and distributing among the users. 

   Community/user type served   

The CESAM chamber is mainly used for research project (so academic sector) nevertheless we have had experiment conducted with companies (self-cleaning material) and for protocol testing from governmental agency (INERIS).

We believe that we will increase our penetration of the sensors/instrumentation community.   Scientific and technical support offered
 Training for the use of the infrastructure and the data treatment is offered. Depending on the degree of expertise of the guest, a data analysis of level 1 (FTIR, PTR-ToF-MS, electronic microscopy and mass spectra) can be proposed to users. In addition, pre-modelling assistance for the definition of experimental conditions is offered to all groups.   Logistic and administrative support offered Administrative support for ordering chemicals and consumables, logistic support for the management of chemicals, including gases (ordering, conservation, provision), as well as centralised logistic support for liquid nitrogen provision.   Person in charge of access provision at the infrastructure 
 Dr. Mathieu Cazaunau, Research Engineer at CNRS,