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Performance of the radphi detector and trigger in a high rate tagged photon beam
Authors:R.T. Jones   T. Bogue   B.E. Evans   M. Kornicer   A.R. Dzierba   R. Gardner   J.L. Gunter   D. Krop   R. Lindenbusch   D.R. Rust   E. Scott   P. Smith   C. Steffen   S. Teige   D.S. Armstrong   J.H.D. Clark   L.J. Kaufman   D.J. Steiner   E. Frlez   D. Pocanic   J.J. Kolata   L.O. Lamm   G. Rogachev   C. Campbell   E. Collins   L. McGlinchey   P. Rubin   E. Walker   G.S. Adams   J. Napolitano   H. Crannell   D.I. Sober   R.R. Mammei  E.S. Smith
Affiliation:1. Faculty of Fundamental Sciences, Ho Chi Minh City University of Industry, 12 Nguyen Van Bao Street, Ward 4, Go Vap District, Ho Chi Minh City, Vietnam;2. Center for Nuclear Techniques Ho Chi Minh City, 217 Nguyen Trai Street, District 1, Ho Chi Minh City, Vietnam;1. Ernest Orlando Lawrence Berkeley National Laboratory, University of California, Berkeley, CA 94720, USA;2. Department of Nuclear Engineering, University of California, Berkeley, CA 94720, USA;1. Physics Department, University of Bucharest, P.O. Box MG-11, 077125 Magurele, Romania;2. Doctoral School of Physics, University of Bucharest, 077125 Magurele, Romania;3. Horia Hulubei National Institute for Physics and Nuclear Engineering, P.O. Box MG-6, 077125 Magurele, Romania;1. Nuclear Technique Laboratory, VNUHCM-University of Science, 227, Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam;2. Department of Nuclear Physics, Faculty of Physics and Engineering Physics, VNUHCM-University of Science, 227, Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam;1. Departamento de Física, Universidad de Las Palmas de Gran Canaria, 3501 Las Palmas de Gran Canaria, Spain;2. Instituto Universitario de Sistemas Inteligentes y Aplicaciones Numéricas en la Ingeniería, Universidad de Las Palmas de Gran Canaria, 3501 Las Palmas de Gran Canaria, Spain;3. Departamento de Física Aplicada, Universidad de Huelva, Campus de Excelencia Internacional del Mar (CEIMAR), 21071 Huelva, Spain;1. Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA;2. Department of Nuclear Engineering, University of California, Berkeley, CA 94720, USA;1. Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139.7), 2695-066 Bobadela, LRS, Portugal;2. Agência Portuguesa do Ambiente, Rua da Murgueira, 9/9ª-Zambujal, 2611-865 Amadora, Portugal
Abstract:
We describe the design and operation of a detector system for measuring all-photon decays of mesons photoproduced in a tagged photon beam with energies between 4.3 and 5.4 GeV and a flux of 5×107 tagged photons per second. Photons from meson decays were detected with a lead-glass calorimeter with an energy resolution of 11% at 1 GeV. Various veto and trigger components were also present. Final states with as many as six photons were successfully detected and reconstructed.
Keywords:Meson   Photoproduction   Radiative   Decay   Phi   radphi
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