Title :
Gamma ray large area space telescope balloon flight engineering model: overview
Author :
Thompson, D.J. ; Hartman, R.C. ; Kelly, H. ; Kotani, T. ; Krizmanic, J. ; Moiseev, A. ; Ormes, J.F. ; Ritz, S. ; Schaefer, R. ; Sheppard, D. ; Singh, S. ; Godfrey, G. ; Silva, E. Do Couto e ; Dubois, R. ; Giebels, B. ; Haller, G. ; Handa, T. ; Kamae, T. ;
Author_Institution :
NASA Goddard Space Flight Center, Greenbelt, MD, USA
Abstract :
The Gamma Ray Large Area Space Telescope (GLAST) Large Area Telescope (LAT) is a pair-production high-energy (>20 MeV) gamma-ray telescope being built by an international partnership of astrophysicists and particle physicists for a satellite launch in 2006, designed to study a wide variety of high-energy astrophysical phenomena. As part of the development effort, the collaboration has built a Balloon Flight Engineering Model (BFEM) for flight on a high-altitude scientific balloon. The BFEM is approximately the size of one of the 16 GLAST-LAT towers and contains all the components of the full instruments: plastic scintillator anticoincidence system (ACD), high-Z foil/Si strip pair-conversion tracker (TKR), CsI hodoscopic calorimeter (CAL), triggering and data acquisition electronics (DAQ), commanding system, power distribution, telemetry, real-time data display, and ground data processing system. The principal goal of the balloon flight was to demonstrate the performance of this instrument configuration under conditions similar to those expected in orbit. Results from a balloon flight from Palestine, Texas, on August 4, 2001, show that the BFEM successfully obtained gamma-ray data in this high-background environment.
Keywords :
astronomical telescopes; coincidence circuits; cosmic ray apparatus; data acquisition; gamma-ray detection; nuclear electronics; particle calorimetry; power amplifiers; silicon radiation detectors; solid scintillation detectors; BFEM; CsI; GLAST; Si; commanding system; data acquisition electronics; gamma ray large area space telescope balloon flight engineering model; ground data processing system; high-altitude scientific balloon; high-background environment; high-energy astrophysical phenomena; hodoscopic calorimeter; instrument configuration; plastic scintillator anticoincidence system; power distribution; real-time data display; satellite launch; silicon strip pair-conversion tracker; telemetry; triggering electronics; Aerospace engineering; Collaboration; Data acquisition; Extraterrestrial phenomena; Instruments; Optical design; Plastics; Poles and towers; Satellites; Telescopes;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2001 IEEE
Print_ISBN :
0-7803-7324-3
DOI :
10.1109/NSSMIC.2001.1008496
