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Klamra, Wlodzimierz
Publications (2 of 2) Show all publications
Swiderski, L., Moszynski, M., Czarnacki, W., Grodzicka-Kobylka, M., Mianowska, Z., Sworobowicz, T., . . . Gola, A. (2018). Temperature Dependence of CsI:Tl Scintillation Pulse Shapes from -183°C to +90°C Measured with a SiPM Readout. In: 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017 - Conference Proceedings: . Paper presented at 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017, 21 October 2017 through 28 October 2017. Institute of Electrical and Electronics Engineers Inc.
Open this publication in new window or tab >>Temperature Dependence of CsI:Tl Scintillation Pulse Shapes from -183°C to +90°C Measured with a SiPM Readout
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2018 (English)In: 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017 - Conference Proceedings, Institute of Electrical and Electronics Engineers Inc. , 2018Conference paper, Published paper (Refereed)
Abstract [en]

A custom designed cryostat was constructed to measure the response of a CsI:Tl scintillator in temperature range from - 183 ^{circ}\mathrm {C} up to +90 ^{circ}\mathrm {C}. The light readout was realized using a SiPM developed by FBK in near ultraviolet high density (NUV-HD) technology. The crystal and the SiPM were installed on separated copper frames. The crystal was cooled down by liquid nitrogen, while the SiPM was kept at temperature close to room temperature. A separation of 1 mm was kept between the crystal and the photodetector to ensure thermal isolation. The temperature of the crystal could be varied by heaters on the scintillator frame and was continuously monitored using a coil shaped resistance thermometer. The CsI:Tl scintillation decay profiles were recorded in the entire temperature range provided by the cryostat.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers Inc., 2018
Keywords
Cesium iodide, Cryostats, Scintillation, Scintillation counters, Silicon compounds, Temperature distribution, Thermoelectricity, Thermometers, Near ultraviolet, Resistance thermometers, Scintillation decay, Scintillation pulse shapes, Sipm readouts, Temperature dependence, Temperature range, Thermal isolation, Medical imaging
National Category
Chemical Sciences
Identifiers
urn:nbn:se:kth:diva-247057 (URN)10.1109/NSSMIC.2017.8532976 (DOI)2-s2.0-85058493318 (Scopus ID)9781538622827 (ISBN)
Conference
2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017, 21 October 2017 through 28 October 2017
Note

QC 20190625

Available from: 2019-06-25 Created: 2019-06-25 Last updated: 2019-06-25Bibliographically approved
Swiderski, L., Moszynski, M., Czarnacki, W., Mianowska, Z., Sibczynski, P., Sworobowicz, T., . . . Gola, A. (2016). CsI:T1 Scintillation Pulse Shapes Measured with a SiPM Photodetector in a Liquid Nitrogen Cryostat. In: 2016 IEEE NUCLEAR SCIENCE SYMPOSIUM, MEDICAL IMAGING CONFERENCE AND ROOM-TEMPERATURE SEMICONDUCTOR DETECTOR WORKSHOP (NSS/MIC/RTSD): . Paper presented at IEEE Nuclear Science Symposium / Medical Imaging Conference / Room-Temperature Semiconductor Detector Workshop (NSS/MIC/RTSD), OCT 29-NOV 06, 2016, Strasbourg, FRANCE. IEEE
Open this publication in new window or tab >>CsI:T1 Scintillation Pulse Shapes Measured with a SiPM Photodetector in a Liquid Nitrogen Cryostat
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2016 (English)In: 2016 IEEE NUCLEAR SCIENCE SYMPOSIUM, MEDICAL IMAGING CONFERENCE AND ROOM-TEMPERATURE SEMICONDUCTOR DETECTOR WORKSHOP (NSS/MIC/RTSD), IEEE , 2016Conference paper, Published paper (Refereed)
Abstract [en]

A custom designed cryostat was constructed to measure the response of a CsI:T1 scintillator at temperatures close to the boiling point of liquid nitrogen (LN2). The scintillation light was collected by an HUV-HD SiPM from FBK with 6x6 mm(2) area and 25x25 mu m(2) cell pitch. The crystal size was 5x6x7 mm(3). All surfaces except the one facing the SiPM were covered with Teflon tape to enhance light collection by the photodetector. The performance of the experimental setup was verified at room temperature using analog electronics for signal processing. The crystal was mounted on a copper frame placed inside the LN2 cryostat. Since our goal was to measure the scintillation decay profiles, and the SiPM response at low temperatures becomes substantially slower than that observed at room temperature, the SiPM was mounted on a separate copper frame connected with the outer housing to keep it close to room temperature. The separation between the crystal surface and the SiPM was about 1.5 mm at room temperature, and it became smaller once the setup was cooled down to LN2 temperature, but even so the crystal and the photodetector were still separated. This approach allowed us to analyze scintillation pulse shapes of CsI:T1 at LN2 temperatures. An energy spectrum of 662 keV gamma-rays from a Cs-137 source was also recorded. The light yield of the CsI:T1 sample at LN2 temperature stands at about 6 % divided by 8 % of the value observed at room temperature.

Place, publisher, year, edition, pages
IEEE, 2016
Series
IEEE Nuclear Science Symposium and Medical Imaging Conference, ISSN 1095-7863
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-242753 (URN)000432419500422 ()978-1-5090-1642-6 (ISBN)
Conference
IEEE Nuclear Science Symposium / Medical Imaging Conference / Room-Temperature Semiconductor Detector Workshop (NSS/MIC/RTSD), OCT 29-NOV 06, 2016, Strasbourg, FRANCE
Note

QC 20190219

Available from: 2019-02-19 Created: 2019-02-19 Last updated: 2019-02-19Bibliographically approved
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