Exploring the limiting timing resolution for large volume CZT detectors with waveform analysis
This paper presents a study for exploring the limiting timing resolution that can be achieved with a large volume 3-D position sensitive CZT detector. The interaction timing information was obtained by fitting the measured cathode waveforms to pre-defined waveform models. We compared the results fro...
| Veröffentlicht in: | IEEE transactions on nuclear science. - 1988. - 550(2005), 1-2 vom: 11. Sept., Seite 435-445 |
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| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2005
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| Zugriff auf das übergeordnete Werk: | IEEE transactions on nuclear science |
| Schlagworte: | Journal Article Large volume 3-D position sensitive czt Timing resolution Waveform analysis |
| Zusammenfassung: | This paper presents a study for exploring the limiting timing resolution that can be achieved with a large volume 3-D position sensitive CZT detector. The interaction timing information was obtained by fitting the measured cathode waveforms to pre-defined waveform models. We compared the results from using several different waveform models. Timing resolutions, of ~9.5 ns for 511 keV full-energy events and ~11.6 ns for all detected events with energy deposition above 250 keV, were achieved with a detailed modeling of the cathode waveform as a function of interaction location and energy deposition. This detailed modeling also allowed us to derive a theoretical lower bound for the error on estimated interaction timing. Both experimental results and theoretical predications matched well, which indicated that the best timing resolution achievable in the 1 cm3 CZT detector tested is ~10 ns. It is also showed that the correlation between sampled amplitudes in cathode waveforms is an important limiting factor for the achievable timing resolution |
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| Beschreibung: | Date Revised 25.02.2020 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
| ISSN: | 0018-9499 |
| DOI: | 10.1016/j.nima.2005.04.076 |