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Dosimetry experiments at the MEDUSA Facility (Little Mountain)

Harper-Slaboszewicz, V.H.; Hartman, Elmer F.; Shaneyfelt, Marty R.; Schwank, James R.; Sheridan, Timothy J.

A series of experiments on the MEDUSA linear accelerator radiation test facility were performed to evaluate the difference in dose measured using different methods. Significant differences in dosimeter-measured radiation dose were observed for the different dosimeter types for the same radiation environments, and the results are compared and discussed in this report.

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Effects of moisture on radiation-induced degradation in CMOS SOI transistors

IEEE Transactions on Nuclear Science

Shaneyfelt, Marty R.; Schwank, James R.; Dodd, Paul E.; Hill, Thomas A.; Dalton, Scott M.; Swanson, Scot E.

The effects of moisture on radiation-induced charge buildup in the oxides of a 0.35 μSOI technology are explored. Data show no observable effects of moisture-related aging on radiation hardness. These results are in contrast to those of previous work performed on bulk MOS technologies fabricated in the 1980s. The cause of these differences do not appear to be due to differences in final chip passivation layers. Instead, other processing variables (e.g., thicker overlayers) may account for these differences. In any case, the SOI technology results indicate that not all advanced technologies exposed to moisture are necessarily susceptible to enhanced radiation-induced degradation. © 2010 IEEE.

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Hardness assurance test guideline for qualifying devices for use in proton environments

IEEE Transactions on Nuclear Science

Schwank, James R.; Shaneyfelt, Marty R.; Dodd, Paul E.; Felix, James A.; Baggio, J.; Ferlet-Cavrois, V.; Paillet, P.; Label, K.A.; Pease, R.L.; Simons, M.; Cohn, L.M.

Proton-induced singl -event effects hardness assurance guidelines are developed to address issues raised by recent test results in advanced IC technologies for use in space environments. Specifically, guidelines are developed that address the effects of proton energy and angle of incidence on single-event latchup and the effects of total dose on single-event upset. The guidelines address both single-event upset (SEU), single-event latchup (SEL), and combined SEU and total ionizing dose (TID) effects. © 2006 IEEE.

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Analysis of proton and heavy-ion irradiation effects on phase change memories with MOSFET and BJT selectors

IEEE Transactions on Nuclear Science

Gasperin, Alberto; Paccagnella, Alessandro; Schwank, James R.; Vizkelethy, Gyorgy; Ottogalli, Federica; Pellizzer, Fabio

We study proton and heavy ion irradiation effects on Phase Change Memories (PCM) with MOSFET and BJT selectors and the effect of the irradiation on the retention characteristics of these devices. Proton irradiation produces noticeable variations in the cell distributions in PCM with MOSFET selectors mostly due to leakage currents affecting the transistors. PCM with BJT selectors show only small variations after proton irradiation. PCM cells do not appear to be impacted by heavy-ion irradiation. Using high temperature accelerated retention tests, we demonstrate that the retention capability of these memories is not compromised by the irradiation. © 2006 IEEE.

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Results 26–50 of 101
Results 26–50 of 101