Abstract
We perform Monte Carlo (MC) simulations to describe heavy ion (HI) nuclear interactions in a broad energy range (4 MeV/n-150 GeV/n), focusing on the single event effect (SEE) sub-linear energy transfer (LET) impact. Previously retrieved single event latch-up (SEL) experimental data have indicated that standard energy ions (~10 MeV/n) can produce high-LET secondaries through fusion reactions which are expected to strongly influence the SEE cross section in the sub-LET region. Alternatively, interactions of higher energy ions (>100 MeV/n) yield secondaries of a similar LET distribution as from the projectile, for projectile-like fragments, and high-energy proton reactions, for target-like fragments. Hence, the factor of relevance to the sub-LET SEE cross section is correlated to low-energy.
Highlights
I NDIRECT energy deposition plays an important role in single event effect (SEE) rate calculations, as indicated by Dodd et al [1]
The impact of the nuclear interaction products on the SEE production is addressed in this work through the analysis of the single event latch-up (SEL) induced on a specific static random-access memory (SRAM) irradiated under the different beam conditions described in Sections I and II
For standard energy heavy ion (HI) and high energy protons, which are widely used for space application SEE tests, the results presented in this article have shown that fusion products, with linear energy transfer (LET) higher than the projectile, dominate as far as the sub-threshold LET region is concerned
Summary
I NDIRECT energy deposition plays an important role in single event effect (SEE) rate calculations, as indicated by Dodd et al [1]. A successful prediction of the proton single event upset (SEU) and single event latch-up (SEL) cross section has been carried out in [3], by utilizing an IRPP-MC model, based on the HI direct ionization response This approach has not been fruitful in achieving a similar accuracy for sub-LET threshold low-energy HI data as it was for high-energy ions or protons. This article includes a comparison between the theoretical contribution of standard energies of neon and argon beams, obtained through MC FLUKA simulations, and the experimental data obtained for the same species at the RADiation Effects Facility (RADEF) in Finland [16] and the Université Catholique de Leuven (UCL), in Belgium [17] It will be further discussed in this work, that standard energy HIs, while interacting with material in the beam line, are leading to high-LET fragments originated from fusion processes. These fragments dominate the SEE cross sections within the sub-LET region
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