SBOK044B December   2020  – December 2024 TPS7H4010-SEP

 

  1.   1
  2. 1 Abstract
  3.   Trademarks
  4. 2 Introduction
  5. 3 Single-Event Effects (SEE)
  6. 4 Device and Test Board Information
  7. 5 Irradiation Facility and Setup
  8. 6 Depth, Range, and LETEFF Calculation
  9. 7 Test Setup and Procedures
  10. 8 Destructive Single-Event Effects (DSEE)
    1. 8.1 Single-Event Latch-up (SEL) Results
    2. 8.2 Single-Event Burnout (SEB) and Single-Event Gate Rupture (SEGR) Results
  11. 9 Single-Event Transients (SET)
  12. 10Event Rate Calculations
  13. 11Summary
  14. 12Revision History
  15.   A Total Ionizing Dose from SEE Experiments
  16.   B References

10 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 10-1 and Table 10-2, respectively. It is important to note that this number is for reference since no SEL or SEB/SEGR events were observed.

Table 10-1 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) 43 6.4 × 10–4 9.23 × 10–8 5.91 × 10–11 2.5 × 10–3 4.63 × 107
GEO 2.2 × 10–3 2 × 10–10 8.4 × 10–3 1.36 × 107
Table 10-2 SEB/SEGR 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) 43 6.4 × 10–4 1.21 × 10–7 7.74 × 10–11 3.2 × 10–3 3.53 × 107
GEO 2.2 × 10–3 2.62 × 10–10 11 × 10–3 1.04 × 107
Table 10-3 Combined SET (1.8V) 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

2.24 x 103

1.66 x 10-4

3.72 x 10-1

1.55 x 107

7.36 x 10-3
GEO

2.70 x 104

4.49 x 100

1.87 x 108

6.10 x 10-4
Table 10-4 VOUT SET (1.8V) 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

 2.24 x 103

8.37 x 10-5

1.87 x 10-1

7.81 x 106

1.46 x 10-2
GEO 2.70 x 104

2.26 x 100

9.42 x 107

1.21 x 10-3
Table 10-5 SS SEFI (1.8V) 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)

2

5.25 x 102

8.27 x 10-5

4.34 x 10-2

1.81 x 106

6.31 x 10-2
GEO

5.22 x 103

4.31 x 10-1

1.80 x 107

6.35 x 10-3
Table 10-6 Combined SET (3.3V) 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

 2.24 x 103 1.49 x 10-4 3.34 x 10-1 1.39 x 107 8.20 x 10-3
GEO 2.70 x 104 4.03 x 100 1.68 x 108 6.79 x 10-4
Table 10-7 VOUT SET (3.3V) 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

 2.24 x 103

8.63 x 10-5

1.93 x 10-1

8.05 x 106

1.42 x 10-2
GEO 2.70 x 104

2.33 x 100

9.71 x 107

1.18 x 10-3
Table 10-8 SS SEFI (3.3V) 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)

2

 5.25 x 102

6.30 x 10-5

3.31 x 10-2

1.38 x 106

8.28 x 10-2
GEO 5.22 x 103

3.29 x 10-1

1.37 x 107

8.34 x 10-3