Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/29432
Title: | Inflight proton activation and damage on a CdTe detection plane | Authors: | Simões, N. Maia, J. M. Curado da Silva, R. M. Ghithan, S. Crespo, P. do Carmo, S. J. C. Alves, Francisco Moita, M. AURICCHIO, NATALIA CAROLI, EZIO |
Issue Date: | 2018 | Journal: | NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT | Number: | 877 | First Page: | 183 | Abstract: | Future high-energy space telescope missions require further analysis of orbital environment induced activation and radiation damage on main instruments. A scientific satellite is exposed to the charged particles harsh environment, mainly geomagnetically trapped protons (up to ∼300 MeV) that interact with the payload materials, generating nuclear activation background noise within instruments' operational energy range and causing radiation damage in detector material. As a consequence, instruments' performances deteriorate during the mission time-frame. In order to optimize inflight operational performances of future CdTe high-energy telescope detection planes under orbital radiation environment, we measured and analyzed the effects generated by protons on CdTe ACRORAD detectors with 2.56 cm<SUP>2</SUP> sensitive area and 2 mm thickness. To carry-out this study, several sets of measurements were performed under a ∼14 MeV cyclotron proton beam. Nuclear activation radionuclides' identification was performed. Estimation of activation background generated by short-lived radioisotopes during one day was less than ∼1.3 ×10-<SUP>5</SUP> counts cm-<SUP>2</SUP> s-<SUP>1</SUP> keV-<SUP>1</SUP> up to 800 keV. A noticeable gamma-rays energy resolution degradation was registered (∼60% @ 122 keV, ∼14% @ 511 and ∼2.2% @ 1275 keV) after an accumulated proton fluence of 4.5 ×101<SUP>0</SUP> protons cm-<SUP>2</SUP>, equivalent to ∼22 years in-orbit fluence. One year later, the energy resolution of the irradiated prototype showed a good level of performancerecovery. | URI: | http://hdl.handle.net/20.500.12386/29432 | URL: | https://www.sciencedirect.com/science/article/pii/S0168900217309841?via%3Dihub | ISSN: | 0168-9002 | DOI: | 10.1016/j.nima.2017.09.017 | Bibcode ADS: | 2018NIMPA.877..183S | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
1-s2.0-S0168900217309841-free.pdf | postprint | 3.05 MB | Adobe PDF | View/Open |
1-s2.0-S0168900217309841-main.pdf | [Administrators only] | 2.92 MB | Adobe PDF |
Page view(s)
50
checked on Apr 24, 2024
Download(s)
28
checked on Apr 24, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are published in Open Access, unless otherwise indicated.