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. de Fisica, Coimbra Univ., Portugal
fDate :
12/1/2000 12:00:00 AM
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 :
data acquisition; liquid ionisation chambers; multiwire ionisation chambers; nuclear electronics; position sensitive particle detectors; positron emission tomography; readout electronics; xenon; Compton scattered events; PET liquid xenon multiwire ionisation chamber; Positron Emission Tomography; Xe; data acquisition systems; drift time based correction algorithm; energy resolution; gamma ray energy; gridless multiwire ionisation chamber; induction cross-talk; ionisation spectra; pulse processing; pulse shape discrimination method; Data acquisition; Energy measurement; Energy resolution; Gamma ray detectors; Ionization chambers; Positron emission tomography; Prototypes; Pulse shaping methods; Testing; Xenon;
Journal_Title :
Nuclear Science, IEEE Transactions on
