SLVK307 April   2026 SN54SC1G125-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 (2.54mm) 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: It is important to note that 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)474.72 × 10–43.69 × 10–81.74 × 10–117.26 × 10–41.57 × 108
GEO1.55 × 10–35.73 × 10–112.39 × 10–34.52 × 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)474.72 × 10–43.69 × 10–71.74 × 10–107.26 × 10–31.57 × 107
GEO1.55 × 10–35.73 × 10–102.39 × 10–24.728 × 106