Title :
Pulse processing for the PET liquid xenon multiwire ionisation chamber
Author :
Crespo, P. ; van der Marel, J. ; Chepel, V. ; Lopes, M.I. ; Santos, Dinis ; Janeiro, L. ; Solovov, V. ; Marques, R. Ferreira ; Policarpo, A.J.P.L.
Author_Institution :
Dept. of Phys., Coimbra Univ., Portugal
Abstract :
The readout and data acquisition systems designed for a first prototype of liquid xenon position sensitive gamma ray detector for Positron Emission Tomography is described, The problem of measurement of the gamma ray energy in the gridless multiwire ionisation chamber is considered. A previously suggested drift time based correction algorithm, allowing correction of the amplitude spectra for the contribution of positive ions, is experimentally tested. First ionisation spectra, with an energy resolution of 15-17%, are presented. A pulse shape discrimination method for rejecting the induction cross-talk between the wires, improving energy resolution and allowing the unambiguous identification of Compton scattered events in the detector, is described
Keywords :
biomedical electronics; data acquisition; multiwire ionisation chambers; nuclear electronics; positron emission tomography; pulse analysers; xenon; Compton scattered events; PET liquid xenon multiwire ionisation chamber; Xe; drift time based correction algorithm; energy resolution; gamma ray energy; gridless multiwire ionisation chamber; ionisation spectra; liquid xenon position sensitive gamma ray detector; pulse shape discrimination method; Data acquisition; Energy measurement; Energy resolution; Gamma ray detectors; Ionization chambers; Position measurement; Positron emission tomography; Prototypes; Testing; Xenon;
Conference_Titel :
Nuclear Science Symposium, 1998. Conference Record. 1998 IEEE
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-5021-9
DOI :
10.1109/NSSMIC.1998.774321
