Design considerations for a high spatial resolution positron camera with dense drift space MWPC's

Journal Article · Tue Feb 01 04:00:00 EST 1983 · IEEE Trans. Nucl. Sci.; (United States)

DOI:https://doi.org/10.1109/TNS.1983.4332348· OSTI ID:6155718

Del Guerra, A; Nelson, W R; Perez-Mendez, V; Schwartz, G

A multiplane positron camera is proposed, made of six MWPC modules arranged to form the lateral surface of a hexagonal prism. Each module (50x50 cm/sup 2/) has a 2 cm thick lead-glass tube converter on both sides of a MWPC pressurized to 2 atm. Experimental measurements are presented to show how to reduce the parallax error by determining in which of the two converter layers the photon has interacted. The results of a detailed Monte Carlo calculation for the efficiency of this type of converter are shown to be in excellent agreement with the experimental measurements. The expected performance of the positron camera is presented: a true coincidence rate of 56000 counts/s (with an equal accidental coincidence rate and a 30% Compton scatter contamination) and a spatial resolution better than 5.0 mm (FWHM) for a 400 ..mu.. Ci point-like source embedded in a 10 cm radius water phantom.

• Research Organization: Lawrence Berkeley Laboratory, Berkeley, CA 94720
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6155718
• Journal Information: IEEE Trans. Nucl. Sci.; (United States), Journal Name: IEEE Trans. Nucl. Sci.; (United States) Vol. 30:1; ISSN IETNA
• Country of Publication: United States
• Language: English

Related Subjects

440100* -- Radiation Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BASIC INTERACTIONS
CAMERAS
COMPTON EFFECT
DESIGN
EFFICIENCY
ELASTIC SCATTERING
ELECTROMAGNETIC INTERACTIONS
ERRORS
GAMMA CAMERAS
INTERACTIONS
MONTE CARLO METHOD
PERFORMANCE
POSITRON CAMERAS
RESOLUTION
SCATTERING
SPATIAL RESOLUTION