The CLAS12 forward electromagnetic calorimeter Article

Asryan, G, Chandavar, S, Chetry, T et al. (2020). The CLAS12 forward electromagnetic calorimeter . NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 959 10.1016/j.nima.2020.163425

cited authors

  • Asryan, G; Chandavar, S; Chetry, T; Compton, N; Daniel, A; Dashyan, N; Gevorgyan, N; Ghandilyan, Y; Giovanetti, K; Griffioen, K; Hicks, K; Kashy, D; Khachatryan, G; Khandaker, M; Phelps, W; Riso, J; Simonyan, A; Salgado, C; Smith, C; Stepanyan, S; Tang, W; Voskanyan, H; Yurov, M



  • The CLAS12 Forward Detector includes six independent lead-scintillator electromagnetic sampling calorimeters to provide the primary electron trigger and extend the CLAS12 detection capability to photons and neutrons. Each calorimeter package consists of two modules, the legacy Electromagnetic Calorimeter (EC) previously used in the CLAS detector, and a new pre-shower calorimeter (PCAL) located in front of the EC to extend the total detector radiation length, in order to fully absorb the electromagnetic showers induced by electrons with energies up to 12 GeV. Both calorimeters use a novel triangular hodoscope geometry with stereo readout. The PCAL uses an upgraded design to provide the high spatial resolution necessary for reconstructing π0 and η decays, and neutrons with high efficiency. This paper treats the design, construction, and calibration of the PCAL and the preliminary combined performance of both detectors.

publication date

  • April 11, 2020

Digital Object Identifier (DOI)


  • 959