Title :
Imaging performance of the Si/Ge hybrid Compton imager
Author :
Burks, Morgan ; Chivers, Dan ; Cork, Chris ; Cunningham, Mark ; Fabris, Lorenzo ; Gunter, Donald ; Hull, Ethan ; Lange, David ; Manini, Hugh ; Mihailescu, Lucian ; Nelson, Karl ; Niedermayr, Thomas ; Valentine, John ; Vetter, Kai ; Wright, Doug
Author_Institution :
Lawrence Livermore Nat. Lab., Berkeley, CA
Abstract :
The point spread function (PSF) of a fully-instrumented silicon/germanium Compton telescope has been measured as a function of energy and angle. Overall, the resolution was 3deg to 4deg FWHM over most of the energy range and field of view. The various contributions to the resolution have been quantified. These contributions include the energy and position uncertainty of the detector; source energy; Doppler broadening; and the 1/r broadening characteristic of Compton back-projection. Furthermore, a distortion of the PSF is observed for sources imaged off-axis from the detector. These contributions are discussed and compared to theory and simulations
Keywords :
Compton effect; germanium radiation detectors; imaging; position sensitive particle detectors; silicon radiation detectors; telescopes; Compton back-projection; Doppler broadening; Si/Ge hybrid Compton imager; fully-instrumented silicon/germanium Compton telescope; point spread function; source energy; Detectors; Energy resolution; Germanium; High-resolution imaging; Image resolution; Instruments; Scattering; Silicon; Strips; Telescopes;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2005 IEEE
Print_ISBN :
0-7803-9221-3
DOI :
10.1109/NSSMIC.2005.1596196
