SBOK092 December   2024 OPA4H199-SP

 

  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
  11. 8 Single-Event Transients (SET)
  12. 9 Event Rate Calculations
  13. 10Summary
  14.   A Total Ionizing Dose from SEE Experiments
  15.   B 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. 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 SEL and SET the event rate calculations for SEL and SET are shown on Table 9-1 and Table 9-2, respectively. Note the onset LETEFF for the long and short SET testing was estimated using Figure 8-1 and Figure 8-2.

Table 9-1 SEL 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) 65 1.19 × 10–4 8.20 × 10-8 9.72 × 10–12 4.05 × 10–4 2.82 × 108
GEO 3.40 × 10–4 2.79 × 10–11 1.16 × 10–3 9.83 × 107
Table 9-2 Long 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) 1.53 8.39 × 102 7.74 × 10-6 6.49 × 10–3 2.71 × 105 4.22 × 10-1
GEO 8.94 × 103 6.92 × 10–2 2.88 × 106 3.96 × 10-2
Table 9-3 Short 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) 0.9 2.75 × 103 1.71 × 10-5 4.70 × 10–2 1.96 × 106 5.83 × 10-2
GEO 3.38 × 104 5.77 × 10–1 2.40 × 107 4.75 × 10-3