SLVK181 January   2025 DRV8351-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 Depth, Range, and LETEFF Calculation
  9. 6 Test Setup and Procedures
  10. 7 Destructive Single-Event Effects (DSEE)
    1. 7.1 Single-Event Latch-up (SEL) Results
    2. 7.2 Single-Event Burnout (SEB)
  11. 8 Single-Event Transients (SET)
  12. 9 Event Rate Calculations
  13. 10Summary
  14.   A References

9 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 shown in Heavy Ion Orbital Environment Single-Event Effects Estimations. Assume a minimum shielding configuration of 100mils (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 and the SEB, the event rate calculation for the SEL and the SEB is shown on Table 9-1 and Table 9-2, respectively.

Table 9-1 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)

48

4.50 × 10–45.68 × 10-82.55 × 10–111.06 × 10–31.07 × 108
GEO1.48 × 10–38.38 × 10–113.49 × 10–33.27 × 107
Table 9-2 SEB 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)

48

4.50 × 10–41.23 × 10-75.54 × 10–112.31 × 10–34.95 × 107
GEO1.48 × 10–31.82 × 10–107.56 × 10–31.51 × 107