CLOUD aims to understand how cosmic rays may affect the nucleation of new aerosol particles from trace atmospheric vapours, which can eventually grow sufficiently to seed cloud droplets.
During the installation of the CLOUD experiment in the T11 experimental zone in the summer of 2009
3D drawings of the CLOUD facility on the wall of the T11 zone
Jasper Kirkby, CLOUD Spokesperson
Antti Onnela, CLOUD Technical Coordinator
Serge Mathot inside the CLOUD chamber
A panoramic view of the CERN East Hall and the CLOUD experiment during the CLOUD2 run, July 2010
Left-to-right: Jonathan Duplissy, Jasper Kirkby and Albin Wasem, discussing the CLOUD gas system.
Serge Mathot installing a transparent high-voltage electrode inside the CLOUD chamber.
The CLOUD experiment in the T11 beamline at the CERN PS during the CLOUD4 run, July 2011
Fish-eye view looking vertically up into the CLOUD chamber from the lower manhole. A high-voltage electrode is visible in the foreground and the UV fibre optic system is seen in the background.
Standing on top of the thermal-housing, Jasper Kirkby points out a few of the 30 mass-spectrometers and other instruments that continuously extract samples of air from the chamber and analyze the contents. (Photo by Rae Ellen Bichell)
Experimental configuration during the CLOUD7 run, October 2012
A '3 o'clock meeting' in the T11 control room to discuss the previous day's findings and plan the next runs. L to R: Petri Vaattovaara/U Eastern Finland, Markus Leiminger/U Frankfurt, Jasmin Tröstl/PSI, Jaeseok Kim/U Eastern Finland, Jasper Kirkby/CERN.
The whiteboard in the T11 control room; planning the next CLOUD runs.
Participants at the CLOUD-ITN Conference, Koenigstein, Germany, 22–25 May 2012