Proton direct ionization upsets at tens of MeV
Coronetti, A., Alia, R. G., Lucsanyi, D., Wang, J., Saigne, F., Javanainen, A., Leroux, P., & Prinzie, J. (2023). Proton direct ionization upsets at tens of MeV. IEEE Transactions on Nuclear Science, 70(4), 314-321. https://doi.org/10.1109/TNS.2022.3207877
Julkaistu sarjassa
IEEE Transactions on Nuclear ScienceTekijät
Päivämäärä
2023Tekijänoikeudet
© Authors 2023
Experimental mono-energetic proton single-event upset (SEU) cross-sections of a 65 nm low core-voltage static random access memory (SRAM) were found to be exceptionally high not only at low energies (< 3 MeV), but also at energies > 3 MeV and extending up to tens of MeV. The SEU cross-section from 20 MeV protons exceed the 200 MeV proton SEU cross-section by almost a factor of 3. Similarly, mono-energetic neutron cross-sections at 14 MeV are about a factor of 3 lower than the 20 MeV proton cross-section. Thanks to Monte-Carlo (MC) simulations it was determined that this strong enhancement is due to the proton direct ionization process as opposed to the elastic and inelastic scattering processes that dominate the SEU response above 3 MeV in other SRAMs. As shown by means of a detailed energy deposition scoring analysis, however, this does not appear to be caused by the critical charge of the SRAM being lower than the charge resulting from the average proton ionization through the linear energy transfer (LET). On the other hand, this is caused by high-energy δ-rays (> 1 keV) that can deposit their full kinetic energy within the sensitive volume (SV) of a cell despite their range being theoretically much longer than the characteristic size of the SV. Multiple scattering events are responsible for increasing the trajectory path of the δ-rays within the sensitive volume, resulting in a 6 fold increase in the probability of upset with respect to the sole electron ionization.
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Institute of Electrical and Electronics Engineers (IEEE)ISSN Hae Julkaisufoorumista
0018-9499Asiasanat
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https://converis.jyu.fi/converis/portal/detail/Publication/156693008
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This study has received funding from the European Union’s Horizon 2020 research and innovation programme under the MSC grant agreement no. 721624, from the European Union’s Horizon 2020 research and innovation programme under grant agreement no. 101008126 and from the European Space Agency (ESA/ESTEC) at the University of Jyväskylä under Contract 4000124504/18/NL/KML/zk.Lisenssi
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