SLVK281 February   2026 SN54SC1G175-SEP

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Overview
  5. 2Single-Event Effects (SEE)
  6. 3Test Device and Test Board Information
  7. 4Irradiation Facility and Setup
  8. 5Results
    1. 5.1 Single-Event Latch-up (SEL) Results
    2. 5.2 Single-Event Transients (SET) Results
  9. 6Event Rate Calculations
  10. 7Summary
  11. 8References

6 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 (2.54 mm) of aluminum, and worst-week solar activity (this is similar to a 99% upper bound for the environment). Table 6-1 and Table 6-2 provide the event rate calculation using the 95% upper-bounds for the SEL and the SET, respectively.

Note: This number is for reference since no SEL or SET events were observed.
Table 6-1 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)MTBF (Years)
LEO (ISS)503.93 × 10–44.10 × 10–81.61 × 10–116.71 × 10–41.70 × 108
GEO1.28 × 10–35.23 × 10–112.18 × 10–35.24 × 107
Table 6-2 SET 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)MTBF (Years)
LEO (ISS)503.93 × 10–43.69 x 10–71.45× 10–106.04× 10–31.89 × 107
GEO1.28 × 10–34.7× 10–101.96 × 10–25.82 × 106