Dynode-Timing Method for PET Block Detectors
2008 (English)In: IEEE Transactions on Nuclear Science, ISSN 0018-9499, Vol. 55, no 1, 451-456 p.Article in journal (Refereed) Published
The focus of this paper is the investigation of a new dynode-timing technique optimized for PET block detectors. This method allows utilization of dynode signals from single but especially multiple photo-multiplier tubes (PMTs), operated with negative high-voltage. The technique will provide an event-timing trigger without deteriorating the anode signal. A printed circuit board has been developed and built for this investigation. Benchmark measurements have been performed, comparing timing of the anode signal with timing of the inverted last-dynode signal and timing of the dynode signal extracted via a newly developed LVPECL-logic based board. Timing measurements were performed with plastic as well as LSO scintillators. From single PMT measurements we find a 30 ps improvement with the dynode-timing method compared to the standard anode timing with two Photonis XP2020Q PMTs with LSO (10 mmtimes10 mmtimes10 mm). For a quad-PMT block detector, assembled of four Hamamatsu R9800 with a Hi-Rez block, the timing-resolution improves ~10%, by 43 ps compared to the standard anode timing.
Place, publisher, year, edition, pages
2008. Vol. 55, no 1, 451-456 p.
IdentifiersURN: urn:nbn:se:su:diva-31664ISI: 000253224800001OAI: oai:DiVA.org:su-31664DiVA: diva2:278543