Author/Authors :
Amarian، نويسنده , , M. and Asryan، نويسنده , , Kenneth G. and Beard، نويسنده , , K. and Brooks، نويسنده , , W. and Burkert، نويسنده , , V. and Carstens، نويسنده , , T. and Coleman، نويسنده , , A. and Demirchyan، نويسنده , , R. and Efremenko، نويسنده , , Yu. and Egiyan، نويسنده , , H. and Egiyan، نويسنده , , K. and Funsten، نويسنده , , H. and Gavrilov، نويسنده , , V. and Giovanetti، نويسنده , , K. and Marshall، نويسنده , , R.M. and Mecking، نويسنده ,
Abstract :
The CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab utilizes six iron-free superconducting coils to provide an approximately toroidal magnetic field. The six sectors are instrumented individually to form six independent spectrometers. The forward region (8°<θ<45°) of each sector is equipped with a lead–scintillator electromagnetic sampling calorimeter (EC), 16 radiation lengths thick, using a novel triangular geometry with stereo readout. With its good energy and position resolution, the EC is used to provide the primary electron trigger for CLAS. It is also used to reject pions, reconstruct π° and η decays and detect neutrons. This paper treats the design, construction and performance of the calorimeter.
Keywords :
CLAS , Calibration , scintillator , Calorimeter
