Calorimetry at Colliders, HCPSS2012, Aug 15/16 2012 J. Proudfoot Calorimetry at Colliders I will give 2 lectures: Part 1 (yesterday): Calorimeter basic principals and general features Part 2 (today) : Precision measurement with calorimeters – turning them into scientific instruments => Focus today will be on photons and jets in collider detectors at the LHC (ATLAS and CMS)