As housing for the new Ift aerosol chamber a hall (Fig. 1) was completed in spring 2004. In this hall was built the new chamber facility LEAK (Leipziger Aerosolkammer). The chamber by itself is made of Teflon FEP film. The chamber has cylindrical geometry, a volume of 19.0 m3 and a surface/volume ratio of 2.0 m-1.
LEAK is equipped with a humidifier, an ozone and a particle generator. Fifty-six UV lamps (100W Eversun Super, Phillips) are used to illuminate the aerosol chamber (cf. Fig. 2). To maximize the light intensity in the chamber, reflective aluminum sheeting covers the walls of the enclosure. A 12 kW heat exchanger controls the temperature of the insulated enclosure housing the Teflon chamber.
Outlets of the chamber are connected with a condensation particle counter (CPC), a continuous monitoring ozone analyzer and a particle sampling filter device with a fixed integrated annular denuder to avoid gaseous contamination of the deposited particles during sampling. The size distributions of particles in the aerosol chamber as a function of time are measured by a differential mobility particle sizer (DMPS). An Agilent gas chromatograph (GC) with flame ionization detector and a PTR-MS (Ionicon) monitor gas-phase hydrocarbon concentrations in the chamber. Experiments in the new chamber will be the ozonolysis of terpenes (β-pinene, α-pinene, limonene). Aim is to study the influence of particles with different acidity on SOA yields and particle phase products. A second topic will be the study of the OH radical initiated reaction of (substituted) aromatic compounds with special attention to the analysis of particulate products.
Staff 
