The small angle tile calorimeter in the DELPHI experiment

The Small angle TIle Calorimeter (STIC) provides calorimetric coverage in t he very forward region of the DELPHI experiment at the CERN LEP collider. T he structure of the calorimeters, built with a so-called "shashlik" techniq ue, gives a perfectly hermetic calorimeter and still allows for the inserti on of tracking detectors within the sampling structure to measure the direc tion of the showering particle. A charged-particle veto system, composed of two scintillator layers, makes it possible to trigger on single photon eve nts and provides e-gamma separation. Results are presented from the extensi ve studies of these detectors in the CERN testbeams prior of installation a nd of the detector performance at LEP. (C) 1999 Elsevier Science B.V. All r ights reserved.