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- W3207528265 abstract "We report the results from proton and gamma ray radiation testing of HgCdTe avalanche photodiode (APD) arrays developed by Leonardo DRS for space lidar detectors. We tested these devices with both approximately 60 MeV protons and gamma rays, with and without the read out integrated circuit (ROIC). We also measured the transient responses with the device fully powered and with the APD gain from unity to greater than 1000. The detectors produced a large current impulse in response to each proton hit but the response completely recovered within 1 microsecond. The devices started to have persistent damage at a proton fluence of 7e10 protons/cm2, equivalent to 10 krad(Si) total ionization dose. The dark current became much higher after the device was warmed to room temperature and cooled to 80K again, but it completely annealed after baking at 85 C for several hours. These results showed the HgCdTe APD arrays are suitable for use in space lidar for typical Earth orbiting and planetary missions provided that provisions are made to heat the detector chip to 85 C for several hours after radiation damage becomes evident that system performance is impacted." @default.
- W3207528265 created "2021-10-25" @default.
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- W3207528265 date "2018-04-15" @default.
- W3207528265 modified "2023-09-23" @default.
- W3207528265 title "Evaluation of Space Radiation Effects on HgCdTe Avalanche Photodiode Arrays for Lidar Applications" @default.
- W3207528265 hasPublicationYear "2018" @default.
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