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- W2556809439 abstract "SUMMARY OF MEASUREMENTS VERSUS PROTON FLUENCE Proton Proton Change in 14 Responsivity Lateral -+fee2 pm Implant Damage Factor Collection Diameter Length Damage at 300 Detector Factor krad(Si) Responsivity at 300 krad(Si) Eauivalent 0 0 05 15 2 0x10'~ (MeV) (p/cm2) Proton Fluence (~lphfplcm~) (1lpm2)l(plcm2 (%) ) 7 4.2 x -12% 1.2 x 10-l9 1.3 x lo-'4 10 12 6.2 x -13 % 8.6 x loa0 7.0 x lo-'' 10 In this section, the correlation of the measured lateral collection length damage constant and responsivity damage factors to the calculated proton NIEL in HgCdTe is presented. The energy dependence of the NIEL provides a framework for estimating the on orbit performance of these parameters. This development made two assumptions that required validation to provide confidence in this analysis. The first assumption was that change in detector performance was due to displacement damage and that this change was linear with proton fluence. This frst assumption has been validated with the measurement results presented in Section 4. The second assumption was that the lateral collection length and responsivity changes in the detectors has the same energy dependence as NIEL. The second assumption is validated by comparing the energy dependence of the lateral collection length damage factors to the NIEL energy dependence as shown in Fig. 16 and Fig. 17. These measured data show a monotonic decrease in both the lateral collection length damage constant and the responsivity damage factor with energy at the lower proton energies of 7 and 12 MeV. At 63 MeV, the lateral collection length damage factor continues to decrease; but not at the rate predicted by the Coulombic contribution to the NIEL. This is likely due to the increase in the inelastic damage contribution to the total NIEL above proton energies of 30 to 50 MeV. The measured data at 63 MeV does not exactly correspond to the calculated NIEL and if the NIEL curve were used to predict the on-orbit change in detector responsivity, it would provide a conservative estimate of the performance change." @default.
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- W2556809439 date "2007-01-01" @default.
- W2556809439 modified "2023-09-26" @default.
- W2556809439 title "Lateral Diffusion Length Changes in HgCdTe Source of Acquisition" @default.
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