SLVK198A July   2025  – August 2025 TPS7H3014-SEP

 

  1.   1
  2.   2
  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) and Single-Event Gate Rupture (SEGR) Results
  11. 8 Single-Event Transients (SET)
  12. 9 Event Rate Calculations
  13. 10Summary
  14.   A References
  15.   B Revision History

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 (2.54mm) 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, SEB/SEGR, and SET, the event rate calculation for the SEL, SEB/SEGR, and SET are shown in Table 9-1, Table 9-2, and Table 9-2, respectively. It is important to note that this number is for reference since no SEL, SEB/SEGR, or SET events were observed.

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)484.50 × 10–47.38 × 10-83.32 × 10–111.38 × 10–38.25 × 107
GEO1.48 × 10–31.09 × 10–104.54 × 10–32.52 × 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 × 10–43.69 × 10-81.66 × 10–116.92 × 10–41.65 × 108
GEO1.48 × 10–35.45 × 10–112.27 × 10–35.07 × 107
Table 9-3 SET (Waiting to Sequence DOWN) 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 × 10–41.84 × 10–78.30 × 10–11

3.46 × 10-3

3.30 × 107
GEO1.48 × 10–32.72 × 10–10

1.13 × 10-2

1.01 × 107
Table 9-4 SET (Waiting to Sequence UP) 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 × 10–41.84 × 10–78.30 × 10–11

3.46 × 10-3

3.30 × 107
GEO1.48 × 10–32.72 × 10–10

1.13 × 10-2

1.01 × 107