What is the ATLAS detector? – Extreme Size Zone

Question: What is the ATLAS detector?
- Keywords:
  atlas,
  space,
  technology
Asked by g30rg1n4 to Deepak on 14 Mar 2014.
- Deepak Kar answered on 14 Mar 2014:
  
  Right, thats a great question. It is a huge machine built to detect everything (well pretty much everything we can detect) coming out of a particle collision. For more details, I refer you to this video:
  http://www.atlas.ch/multimedia/episode-2.html
  
  Except that fact that it is no longer under construction, and working great, everything there is accurate.

Question: What is the ATLAS detector?