Feb 09

Science Alive! 2009 – Cloud Chamber

MVI_3624, originally uploaded by NDeRC2.

Lots of wonderful things happen at Science Alive!, the award-winning annual event held at the Saint Joseph County Public Library. A few highlights from the event are captured here.

In this video, cosmic rays leave vapor trails as they ionize ethanol in this supersaturated cloud chamber. For whatever reason, the basement of the SJCPL is especially active: the cloud chamber puts on a better show there than anywhere else we’ve seen, and that in spite of some degree of shielding of cosmic rays one would expect underneath a building of several stories. Any ideas as to why this might be the case?