CASTOR Detector Performance during the LHC Collision Runs at $\sqrt{s} = 0.9, 2.36$ and 7 TeV

Basic performance plots for the CASTOR calorimeter are provided on the signal timing, the effect of the CMS solenoid field on the PMT response, the description of the longitudinal shower profile and pi/e response in test beam data by Monte Carlo simulation and the total collected charge in $pp$ collisions at $\sqrt{s} = 0.9, 2.36$ and 7 TeV.