Title :
A pixelated BGO scintillator array for high energy ´flash´ radiography
Author :
Quillin, S. ; Aedy, C.
Author_Institution :
Adv. Radiography Group, Reading, UK
Abstract :
Transmission X-ray radiography of dense objects plays an important role in AWE hydrodynamics (hydro) experiments. The most challenging of these hydro experiments is a flash radiographic technique known as ´core-punching´. This technique utilises a 100 ns burst of MeV photons to image a dense, explosively driven object. MeV X-ray flash radiographic imaging is typically characterised by a low signal fluence of the most penetrating energies i.e. 2-5 MeV. X-ray converter (i.e. the scintillator) characteristics dominate the detector performance in terms of both quantum efficiency and resolution. Requirements are for a high (X-ray) quantum efficiency (>20%) together with ∼1 mm spatial resolution. The design and construction of a large format pixelated BGO scintillator array, to meet this stringent requirement, is described.
Keywords :
X-ray apparatus; X-ray imaging; position sensitive particle detectors; radiography; solid scintillation detectors; 100 ns; 2 to 5 MeV; AWE hydrodynamics experiments; X-ray converter; X-ray flash radiographic imaging; X-ray quantum efficiency; core-punching; explosively driven object; high energy flash radiography; hydro experiments; large format pixelated BGO scintillator array; signal fluence; spatial resolution; transmission X-ray radiography; Cameras; Charge coupled devices; Charge-coupled image sensors; Object detection; Optical imaging; Radiography; Spatial resolution; X-ray detection; X-ray detectors; X-ray imaging;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2004 IEEE
Print_ISBN :
0-7803-8700-7
Electronic_ISBN :
1082-3654
DOI :
10.1109/NSSMIC.2004.1462329
