The CLAS forward electromagnetic calorimeter

Authors
Amarian, M Asryan, G Beard, K Brooks, W Burkert, V Carstens, T Coleman, A Demirchyan, R Efremenko, Y Egiyan, H Egiyan, K Funsten, H Gavrilov, V Giovanetti, K Marshall, RM Mecking, B Minehart, RC Mkrtchan, H Ohandjanyan, M Sharabian, Y Smith, LC Stepanyan, S Stephens, WA Tung, TY Zorn, C
Citation
M. Amarian et al., The CLAS forward electromagnetic calorimeter, NUCL INST A, 460(2-3), 2001, pp. 239-265
Citations number
17
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
01689002 → ACNP
Volume
460
Issue
2-3
Year of publication
2001
Pages
239 - 265
Database
ISI
SICI code
0168-9002(20010321)460:2-3<239:TCFEC>2.0.ZU;2-C
Abstract
The CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab utilizes si x iron-free superconducting coils to provide an approximately toroidal magn etic field. The six sectors are instrumented individually to form six indep endent spectrometers. The forward region (8 degrees < <theta> < 45<degrees> ) of each sector is equipped with a lead-scintillator electromagnetic sampl ing 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 als o used to reject pions, reconstruct pi degrees and eta decays and detect ne utrons. This paper treats the design, construction and performance of the c alorimeter. (C) 2001 Elsevier Science B.V. Ail rights reserved.