Fast and Efficient Detection of 511 keV Photons using Cherenkov Light in PbF$_2$ Crystal coupled to a MCP-PMT and SAMPIC Digitization Module
| Autor: | Canot, C., Alokhina, M., Abbon, P., Bard, J. P., Breton, D., Delagnes, E., Maalmi, J., Tauzin, G., Yvon, D., Sharyy, V. |
|---|---|
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Journal of Instrumentation, 14, P1200 (2019) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/1748-0221/14/12/P12001 |
| Popis: | We study the possibility to use the Cherenkov light for the efficient detection of 511 keV photons with the goal to use it in TOF-PET. We designed and tested two detection modules consisting of PbF$_2$ crystals attached to Planacon MCP-PMT XP85012. Amplified PMT signals are digitized by the SAMPIC module with high readout rate, up to $10^5$ events/s, and a negligible contribution to the time resolution, below 20 ps (FWHM). We developed a fast 2D scanning system to calibrate the PMT time response and studied in details the timing characteristics of the Planacon PMT. Using a radioactive $^{22}$Na source we measured a detection efficiency of 24% for 511 keV photons in a 10 mm thick crystal and a coincidence resolving time of 280 ps. We analyzed the main factors limiting the time resolution of the large-surface detection module and proposed solutions to improve it, which will be tested in our future project. Comment: Accepted by JINST |
| Databáze: | arXiv |
| Externí odkaz: |
|