A silicon Compton imager

Author

Wulf, Eric A. ; Phlips, Bernard F. ; Kurfess, James D. ; Novikova, Elena I. ; Fitzgerald, Carrie M.

Author_Institution

Naval Res. Lab., Washington, DC

Volume

1

fYear

2005

fDate

23-29 Oct. 2005

Firstpage

1

Lastpage

5

Abstract

A Compton imager has been constructed using arrays of detectors with active areas of 11.4 times 11.4 cm². These arrays are stacked 8 layers deep. 32-channel analog ASICs are used to read-out the arrays. This imager is a prototype for a large, high-efficiency Compton imager that will meet operational requirements of the Defense Threat Reduction Agency. The instrument created positron emission tomography (PET) images of multiple ²²Na sources within its field of view. The image of a 1 mm point source had a measured full width half maximum (FWHM) of 1.25 mm or an intrinsic resolution of 0.75 mm. Using a known source position and partial energy deposition in the Compton imager, the initial gamma-ray energy was reconstructed. The energy resolution was 43 keV FWHM at 662 keV and 83 keV FHWM at 1173 keV. The resolution is dominated by the readout electronics resolution and will be improved

Keywords

Compton effect; application specific integrated circuits; gamma-ray apparatus; gamma-ray detection; nuclear electronics; positron emission tomography; readout electronics; silicon radiation detectors; 1 mm; 11.4 cm; PET images; analog ASIC; high-efficiency Compton imager prototype; multiple ²²Na sources; partial energy deposition; positron emission tomography; readout electronics; silicon Compton imager; Detectors; Energy resolution; Image reconstruction; Image resolution; Instruments; Positron emission tomography; Prototypes; Readout electronics; Sensor arrays; Silicon;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium Conference Record, 2005 IEEE

Conference_Location

Fajardo

ISSN

1095-7863

Print_ISBN

0-7803-9221-3

Type

conf

DOI

10.1109/NSSMIC.2005.1596195

Filename

1596195