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ISAC

ISAC information

General information
Access mode Physical access
Infrastructure name and acronym Interfaces Simulation Atmospheric Chamber (ISAC)
Photos  


Location Lyon, France
Website and/or 360° tours
Legal name of organisation operating the infrastructure Centre National de la Recheche Scientifique - CNRS (IRCELyon)
Description of the infrastructure
Brief general description of the infrastructure to which access is offered

ISAC is a medium sized indoor simulation chamber which has been developed specifically to investigate interfaces processes such as air-water-air, air-sol,…, interfaces. It is made of a 2m3 Teflon envelop embedded in a structure containing the irradiation system UV and visible light sources. On the floor of the chamber sits a tank which can be filled with any liquid/material/chemicals. The liquid filling and emptying can be done without opening the chamber. The cuboid shape of the chamber allows people to enter by a door to manually scrub the walls and the tank allowing to minimize the memory effects of the chamber. 
Samples can be taken at 2 different heights to measure concentration gradients in the chamber. The analytical devices permanently connected to the chamber are gas phase monitors (O3, CO, NOx at pptv level), particle size distribution measured by SMPS and SRI-TOF-MS for VOC analysis. 
Water from the tank can be analysed by UPLC-HR-MS and by Ion Chromatography. A more advanced characterization of the particulate matter can be achieved online with AMS or offline by sampling and chemical analysis by UPLC-HR-MS and TEM/EDX measurements. 
Even more advanced analysis on particles can be conducted on the Ly-EtTEM microscope which allows to work under a controlled atmosphere until 20 mbar. 

Services currently offered by the infrastructure and its research environment

The chamber now well characterized allows the study of interfacial processes and especially liquid/gas interactions. It is equipped with the most advanced analytical equipment to investigate both gas and liquid phases. Morphological characterisation of the particulate matter formed in the chamber and its behaviour when exposed to gases can be studied with Environmental TEM. This instrument is quasi unique in Europe as it allows precise determination of exchanges at macroscopic interfaces.
The research engineer will teach how to use the chamber and will ensure that the experiments are run in an optimal way.

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

5 days allows to run a blank experiment, a “real” experiment and the collection of the particulate matter samples. These 5 days of experiment include half a day of work on the E-TEM. A study with variable parameters will require 4 weeks of experiments

Community/user type served

Users from academic sector (expert and young researchers), SMEs

Scientific and technical support offered
A research engineer will follow, support and monitor on-going activities.
Logistic and administrative support offered Local logistic support is currently offered to all visitors coming to IRCELyon
Person in charge of access provision at the infrastructure

Sébastien Perrier, research engineer, sebastien.perrier@ircelyon.univ-lyon1.fr

 Extended technical information
Physical description 

ISAC is a parallelepiped rectangle teflon chamber. The temperature is not controlled but regulated by the air of the laboratory which is air conditioned.

Mechanical description

1m side length and 2m height. Volume is 2 m3.

Irradiation spectra   
Size dependent aerosol loss/lifetime
Auxiliary mechanism
O3→ O3_Wall                                      kW,O3 = 5.5 ×10-6 s-1
Description paper

Alpert P, Ciuraru R, Rossignol S, Passananti M, Tinel L, Perrier S, Dupart Y, Steimer S, Ammann M, Donaldson D, George C : Fatty Acid Surfactant Photochemistry Results in New Particle Formation. Scientific reports 2017 n°7. DOI ref : 10.1038/s41598-017-12601-2. Hal ref : hal-01625639

Bernard, F., Ciuraru, R., Boréave, A. & George, C. Photosensitized Formation of Secondary Organic Aerosols Above the Air/Water 8 Interface. Environ. Sci. Technol. 50, 8678-8686, doi:10.1021/acs.est.6b03520 (2016)