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The CLAS Forward Electromagnetic Calorimeter

By M. Amarian, Geram Asryan, Kevin Beard, Will Brooks, Volker Burkert, Tom Carstens, Alan Coleman, Raphael Demirchyan, Yuri Efremenko, Hovanes Egiyan, Kim Egiyan, Herb Funsten, Vladimir Gavrilov, Kevin L. Giovanetti, R.M. Marshall, Berhard Mecking, R.C. Minehart, H. Mkrtchan, Mavrik Ohandjanyan, Youri Sharabian, L.C. Smith, Stepan Stepanyan, W.A. Stephens, T.Y. Tung and Carl Zorn

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 (8deg < (theta) < 45deg) 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 pi-0 and eta decays and detect neutrons, This paper treats the design, construction and performance of the calorimeter

Topics: Spectrometers, Magnetic Fields, Calorimeters, Geometry, Superconducting Coils, Sampling, Neutrons, Construction, Pions, 72 Physics Of Elementary Particles And Fields, Electrons, Resolution, Radiation Length
Publisher: Thomas Jefferson National Accelerator Facility (U.S.)
Year: 2001
DOI identifier: 10.1016/s0168-9002(00)00996-7
OAI identifier:
Provided by: UNT Digital Library
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