ATLAS observes cosmic-ray events underground!
Very good news – according to Travis Stewart the ATLAS tile calorimeter has recorded clean cosmic-ray events in the underground cavern. Here is the picture he posted:
Please visit his blog in order to see more information about this.While people are not interested in using ATLAS to do comic-ray physics, this accomplishment is important because it shows an expected signal successfully recorded and understood – the hits are in the right place, there are no garbage hits, the event has the right features, etc. Progress over the next year or two will consist of moving from one modest success (like this one) to the next one, which will be slightly less trivial. So, after a year of comic rays, we will hope to count the number of tracks in minimum-bias events…
(A disclosure: while I am happy about this success, it also makes me slightly nervous and envious, since I am a member of the competing CMS collaboration…)
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