SLVK231 November   2025 TPS7H4104-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 LETEFF and Range Calculation
  9. 6 Test Setup and Procedures
  10. 7 Destructive Single-Event Effects (DSEE)
    1. 7.1 Safe Operating Area (SOA) Results
    2. 7.2 Single-Event Latch-up (SEL) Results
    3. 7.3 Single-Event Burnout (SEB) and Single-Event Gate Rupture (SEGR) Results
  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 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). Using the 95% upper-bounds for the SEL and the SEB/SEGR, the event rate calculation for the SEL and the SEB/SEGR is shown on Table 9-1 and Table 9-2, respectively. SET orbit rate is presented on Table 9-2. It is important to note that this number is for reference since no SEL, SEB/SEGR, or SET events were observed at the SOA bias conditions discussed in this report.

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 × 10–49.22 x 10-84.15 × 10–111.73 × 10–36.60 × 107
GEO1.48 × 10–31.36 × 10–105.67 × 10–32.01 × 107
Table 9-2 SEB/SEGR 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 × 10–45.27 x 10-82.37 × 10–119.88 × 10–41.15 × 108
GEO1.48 × 10–37.78 × 10–113.24 × 10–33.52 × 107
Table 9-3 SET Event Rate Calculations for Worst-Week LEO and GEO Orbits
Orbit Type Onset LETEFF (MeV-cm2/mg) CREME96 Integral FLUX (/day/cm2) σSAT (cm2) Event Rate (/day) Event Rate (FIT) MTBE (Years)
LEO (ISS)

48

 4.50 × 10–4 3.69 x 10-7 1.66 × 10–10 6.92 × 10–3 1.65 × 107
GEO 1.48 × 10–3 5.45 × 10–10 2.27 × 10–2 5.03 × 106