SLVK282 April   2026 ISOS510-SEP

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 Introduction
  5. 2 Single-Event Effects (SEE)
  6. 3 Device and Test Board Information
  7. 4 Irradiation Facility and Setup
  8. 5 Test Setup and Procedures
  9. 6 Single-Event Latch-up (SEL) Results
  10. 7 Single-Event Transients (SET) Results
  11. 8 Event Rate Calculations
  12. 9 Summary
  13. 10References

8 Event Rate Calculations

Event rates were calculated for LEO (ISS) and GEO environments by combining CREME96 orbital integral flux estimations and simplified SEE cross-sections according to methods described in Heavy Ion Orbital Environment Single-Event Effects Estimations application report. We assume a minimum shielding configuration of 100 mils (2.54mm) of aluminum, and “worst-week” solar activity (this is similar to a 99% upper bound for the environment). Using the 95% upper-bounds for the SEL, the event rate calculation for the SEL is shown on Table 8-1. Note that this number is for reference since no SEL events were observed.

Table 8-1 SEL Event Rate Calculations for Worst-Week LEO and GEO Orbits
Orbit TypeOnset LETEFF (MeV-cm2/mg)CREME96 Integral FLUX (/day/cm2)σSAT (cm2)Event Rate (/day)Event Rate (FIT)MTBE (Years)
LEO (ISS)

47

4.81 × 10–48.20 × 10–83.94 × 10–111.64 × 10–36.95 × 107
GEO1.58 × 10–31.30 × 10–105.40 × 10–32.11 × 107