At the core of the AGILE scientific instrument, designed to operate on a satellite, there is the Gamma Ray Imaging Detector (GRID) consisting of a Silicon Tracker (ST), a Cesium Iodide Mini-Calorimeter and an Anti-Coincidence system of plastic scintillator bars. The ST needs an on-ground calibration with a gamma-ray beam to validate the simulation used to calculate the energy response function and the effective area versus the energy and the direction of the gamma rays. A tagged gamma-ray beam line was designed at the Beam Test Facility (BTF) of the INFN Laboratori Nazionali of Frascati (LNF), based on an electron beam generating gamma-rays through bremsstrahlung in a position-sensitive target. The gamma-ray energy is deduced by difference with the post-bremsstrahlung electron energy [1,2]. The electron energy is measured by a spectrometer consisting of a dipole magnet and an array of position sensitive silicon strip detectors, the Photon Tagging System (PTS). The use of the combined BTF-FTS system as tagged photon beam requires understanding the efficiency of gamma-ray tagging, the probability of fake tagging, the energy resolution andthe relation of the PTS hit position versus the gamma-ray energy. This paper describes this study comparing data taken during the AGILE calibration occurred in 2005 with simulation. (C) 2012 Elsevier B.V. All rights reserved.
Characterization of a tagged gamma-ray beam line at the DA Phi NE Beam Test Facility / Cattaneo PW; Argan A; Boffelli F; Bulgarelli A; Buonomo B; Chen AW; DAmmando F; Foggetta L; Froysland T; Fuschino F; Galli M; Gianotti F; Giuliani A; Longo F; Marisaldi M; Mazzitelli G; Pellizzoni A; Prest M; Pucella G; Quintieri L; Rappoldi A; Tavani M; Trifoglio M; Trois A; Valente P; Vallazza E; Vercellone S; Zambra A; Barbiellini G; Caraveo P; Cocco V; Costa E; De Paris G; Del Monte E; Di Cocco G; Donnarumma I; Evangelista Y; Feroci M; Ferrari A; Fiorini M; Labanti C; Lapshov I; Lazzarotto F; Lipari P; Mastropietro M; Mereghetti S; Morelli E; Moretti E; Morselli A; Pacciani L; Perotti F; Piano G; Picozza P; Pilia M; Porrovecchio G; Rapisarda M; Rubini A; Sabatini S; Soffitta P; Striani E; Vittorini V; Zanello D; Colafrancesco S; Giommi P; Pittori C; Santolamazza P; Verrecchia F; Salotti L. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - STAMPA. - 674:(2012), pp. 55-66. [10.1016/j.nima.2012.01.049]
Characterization of a tagged gamma-ray beam line at the DA Phi NE Beam Test Facility
D'AMMANDO, FILIPPO;
2012
Abstract
At the core of the AGILE scientific instrument, designed to operate on a satellite, there is the Gamma Ray Imaging Detector (GRID) consisting of a Silicon Tracker (ST), a Cesium Iodide Mini-Calorimeter and an Anti-Coincidence system of plastic scintillator bars. The ST needs an on-ground calibration with a gamma-ray beam to validate the simulation used to calculate the energy response function and the effective area versus the energy and the direction of the gamma rays. A tagged gamma-ray beam line was designed at the Beam Test Facility (BTF) of the INFN Laboratori Nazionali of Frascati (LNF), based on an electron beam generating gamma-rays through bremsstrahlung in a position-sensitive target. The gamma-ray energy is deduced by difference with the post-bremsstrahlung electron energy [1,2]. The electron energy is measured by a spectrometer consisting of a dipole magnet and an array of position sensitive silicon strip detectors, the Photon Tagging System (PTS). The use of the combined BTF-FTS system as tagged photon beam requires understanding the efficiency of gamma-ray tagging, the probability of fake tagging, the energy resolution andthe relation of the PTS hit position versus the gamma-ray energy. This paper describes this study comparing data taken during the AGILE calibration occurred in 2005 with simulation. (C) 2012 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
