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First Results of CERN's CLOUD Experiment Published in NATURE

Published: Thursday, August 25, 2011
Last Updated: Thursday, August 25, 2011
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The CLOUD experiment has been designed to study the effect of cosmic rays on the formation of atmospheric aerosols under controlled laboratory conditions.

Atmospheric aerosols, tiny liquid or solid particles suspended in the atmosphere, are thought to be responsible for a large fraction of the seeds that form cloud droplets.

The CLOUD results show that trace vapors assumed until now to account for aerosol formation in the lower atmosphere can explain only a tiny fraction of the observed atmospheric aerosol production. The results also show that ionization from cosmic rays significantly enhances aerosol formation. Precise measurements such as these are important in achieving a quantitative understanding of cloud formation, an important contribution to climate models.

The prestigious NATURE journal has now published first results from the CLOUD experiment, where two PTR-MS instruments contributed to this cutting edge project. A quadrupole based PTR-MS was used to monitor trace concentrations of Ammonia and a PTR-TOF-MS system (based on time of flight technology) continuously scanned organic vapor concentrations in the CLOUD chamber.

IONICON Analytik is the world’s leading manufacturer of PTR-MS instruments and has developed the high-resolution PTR-TOF-MS technology together with the Institute for Ion Physics and Applied Physics of the University of Innsbruck. IONICON commercialized the PTR-TOFMS series very successfully in 2007 for the ultra-sensitive and high-resolution quantification of VOCs in real-time.

IONICON is a proud partner of the CLOUD Initial Training Network (CLOUD-ITN) project, a multi-site network of 8 Ph.D. students and 2 post-docs at 9 partner institutions across Europe.

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