X-Y position readout of a YAP:Ce crystal matrix using wavelength-shifting fibers

Author

Del Guerra, A. ; Damiani, C. ; Zavattini, G. ; Di Domenico, G. ; Belcari, N. ; Vaiano, A.

Author_Institution

Dipartimento di Fisica, Pisa Univ., Italy

Volume

48

Issue

4

fYear

2001

fDate

8/1/2001 12:00:00 AM

Firstpage

1108

Lastpage

1113

Abstract

A set of preliminary test results of a detector prototype for positron emission tomography applications is presented. The detector is made of a YAP:Ce finger crystal (2×2×30 mm³ each) matrix coupled to a set of square section wavelength-shifting fibers (one fiber for each matrix row and one fiber for each matrix column) read by a position-sensitive detector. The recognition of each fiber allows the determination of the x-y position of the scintillation event. The light yield of the system has been investigated: all possible light loss factors have been taken into account to evaluate the expected signal. Experimental measurements with a single-pixel hybrid photodiodes have been performed. We have measured about ten photoelectrons for a deposit of 511 keV in the scintillator for each coordinate. Preliminary position measurements with a small 5×5 matrix are presented

Keywords

cerium; position sensitive particle detectors; positron emission tomography; solid scintillation detectors; yttrium compounds; X-Y position readout; YAP:Ce; YAP:Ce crystal matrix; YAP:Ce finger crystal; YAlO3:Ce; light loss factors; positron emission tomography applications; scintillation event; single-pixel hybrid photodiodes; wavelength-shifting fibers; Coordinate measuring machines; Fingers; Optical fiber testing; Performance evaluation; Photodiodes; Position measurement; Position sensitive particle detectors; Positron emission tomography; Prototypes; Solid scintillation detectors;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.958732

Filename

958732