Title :
Status of the High Efficiency Multimode Imager
Author :
Galloway, Michelle L. ; Amman, Mark ; Awadalla, Salah ; Bindley, Glenn ; Boggs, Steven E. ; Chen, Henry ; Chivers, Dan ; Lee, Julie S. ; Luke, Paul N. ; Marthandam, Pramodha ; Mihailescu, Lucian ; Negut, Victor ; Priest, Anders ; Taherion, Saeid ; Vetter,
Author_Institution :
Space Sci. Lab., Univ. of California at Berkeley, Berkeley, CA, USA
Abstract :
The High Efficiency Multimode Imager (HEMI) is an instrument to detect, locate, and spectroscopically characterize radioactive sources with gamma-ray emissions at long-range standoff distances. HEMI consists of modular cubic-centimeter coplanar-grid CdZnTe detector elements configured in a two-plane array that allows for both Compton scattering and coded aperture imaging. Measurements and simulations have been performed using a variety of radioactive sources at different positions with respect to a prototype HEMI array in order to demonstrate the source identification and localization capabilities of the system. This paper will provide an overview of the HEMI instrument as well as present results from simulations and measurements using the completed detector array.
Keywords :
Compton effect; gamma-ray detection; gamma-ray production; high energy physics instrumentation computing; image reconstruction; radioactive sources; semiconductor counters; Compton scattering; coded aperture imaging method; gamma-ray emissions; high efficiency multimode imager; image reconstruction; long-range standoff distance; modular cubic-centimeter coplanar-grid CdZnTe detector; prototype HEMI array; spectroscopically radioactive source characterization; two-plane array; Application specific integrated circuits; Detectors; Energy measurement; Q measurement;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2011 IEEE
Conference_Location :
Valencia
Print_ISBN :
978-1-4673-0118-3
DOI :
10.1109/NSSMIC.2011.6154328
