Its the STAR detector at the Relativistic Heavy Ion Collider at Brookhaven National Laboratory and it came in news recently for detecting d heaviest antinucleus ever detected-anti-alpha..(antimatter partner of helium nucleus)
Looked at first sight like the large hadron collider@CERN....but cheating with tineye confirms that i'm wrong...making it the STAR detector(for Solenoidal Tracker at RHIC)at the Brookhaven national laboratory,United States.sorry!!:P
The STAR detector at the Brookhaven National Laboratory.It discovered the largest traces of antimatter (antihelium-4) yet,on april 24,2011.read more-http://www.physorg.com/news/2011-04-antihelium-physicists-nab-heaviest-antimatter.html
So what is it..?