The pion single-event latch-up cross-section enhancement : mechanisms and consequences for accelerator hardness assurance
Coronetti, A., Alia Garcia, R., Cerutti, F., Hajdas, W., Söderström, D., Javanainen, A., & Saigne, F. (2021). The pion single-event latch-up cross-section enhancement : mechanisms and consequences for accelerator hardness assurance. IEEE Transactions on Nuclear Science, 68(8), 1613-1622. https://doi.org/10.1109/TNS.2021.3070216
Published inIEEE Transactions on Nuclear Science
© 2021 the Authors
Pions make up a large part of the hadronic environment typical of accelerator mixed-fields. Characterizing device cross-sections against pions is usually disregarded in favour of tests with protons, whose single-event latch-up cross-section is, nonetheless, experimentally found to be lower than that of pions for all energies below 250 MeV. While Monte-Carlo simulations are capable of reproducing such behavior, the reason of the observed pion cross-section enhancement can only be explained by a deeper analysis of the underlying mechanisms dominating proton-silicon and pion-silicon reactions. The mechanisms dominating the single-event latchup response are found to vary with the energy under consideration. While a higher pion nuclear reaction rate, i.e., probability of interaction, can explain the observed latchup cross-section enhancement at energies > 100 MeV, it is the volume-equivalent linear energy transfer (LETEQ) of the secondary ions that keeps the pion latchup response high at lower energies. The higher LETEQ of secondary ions from pion-silicon interactions are caused by the pion absorption mechanism, which is highly exothermic. In spite of the observed higher cross-section for pions, the high-energy hadron approximation is found to still provide reliable estimations of the latch-up response of a device in mixed-field. ...
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
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Related funder(s)European Commission
The content of the publication reflects only the author’s view. The funder is not responsible for any use that may be made of the information it contains.
Additional information about fundingThis study has received funding from the European Union’s Horizon 2020 research and innovation programme under the MSC grant agreement no. 721624
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