Title :
Imager prototype for gamma-ray astronomy: functional performance
Author :
Labanti, C. ; Rossi, E. ; Schiavone, F. ; Spizzichino, A. ; Traci, A. ; Corba, M. ; Quadrini, M.E. ; Bird, A.J. ; Carter, T. ; Gomm, A.J.M.
Author_Institution :
Istituto TESR, Bologna, Italy
Abstract :
A prototype module for the imager on INTEGRAL (International Gamma Ray Astrophysics Laboratory) has been constructed for laboratory and space tests by means of a balloon launch. The main detector is designed to operate in the energy range from 0.25 to 10 MeV and consists of 96 CsI(Tl) bars 15 cm in length. At 662 keV, the typical performance is 1.5 cm FWHM spatial resolution (1 σ) along the bar, and 15% energy resolution. The work carried out during instrument construction and calibration is described with emphasis on the simple method which has been implemented to normalize the nonuniformity of the performance of the bars. Measurements of energy threshold and energy and position resolution are discussed
Keywords :
astronomical instruments; caesium compounds; calibration; gamma-ray astronomy; scintillation counters; thallium; 0.25 to 10 MeV; CsI:Tl; INTEGRAL; International Gamma Ray Astrophysics Laboratory; calibration; energy threshold; gamma-ray astronomy; imager; position resolution; prototype module; spatial resolution; Astronomy; Astrophysics; Bars; Detectors; Energy resolution; Instruments; Laboratories; Prototypes; Spatial resolution; Testing;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1992., Conference Record of the 1992 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-0884-0
DOI :
10.1109/NSSMIC.1992.301369
